The traditional waterfall method involves the breakdown of projects into
linear sequential phases. This method didn't give enough room for changes
to be made during testing stages.
The practitioners of alternative software development methods were not
satisfied with the traditional waterfall method due to other reasons such as:
Inferior quality.Bad visibility.Large risk etc.Read more about Waterfall method here https://brainly.com/question/25655550
It should be noted that the practitioners of alternative software development methods not satisfied with the traditional waterfall method because;
Of inability to make changes during testing stages.Large riskInferiority quality.The traditional waterfall method in software development can be regarded as a method which involves development of the projects base on linear sequential phases.
However, this method doesn't allow to make changes Incase their is an error during testing stages.
Learn more about software development at,
https://brainly.com/question/22654163
in a multitasking system, the context-switch time is 1ms and the time slice is 10ms. Will the CPU efficiency increase or decrease when we increase the time slice to 15ms? Explain why.
Answer:
Answer explained below
Explanation:
It depends on the arrival time and burst time of the processes. On increasing the time slice the waiting and turn around time can increase and decrease both.
As waiting time and turn around time are the major criteria for calculating the efficiency, so we can't say whether the efficiency will increase or decrease.
Remember for a moment a recent trip you have made to the grocery store to pick up a few items. What pieces of data did the Point of Sale (POS) terminal and cashier collect from you and what pieces of data about the transaction did the POS terminal pull from a database to complete the sale? In addition to the data collected and retrieved what information was generated by the POS terminal at the end of the order, as it is being completed?Identify the following parts of a common grocery store transaction as data, information, or knowledge.1. An item's UPC number 2. Change back to customer 3. General changes to demand in different seasons 4. Cost each Data 5. Quantity purchased 6. Non-taxable total 7. Extended cost (quantity times cost each) 8. Amount tendered 9. Sales of an item for the last week 10. Upcoming holidays and customer's special needs 11. How paid (cash, charge card, debit card) 12. Shopper loyalty card number 13. Taxable total
Answer:
Answer is explained below
Explanation:
Data: Data are raw facts and figures that are collected together for analysis. In other words, Simple no processing is data.
Information: Information is the facts provided about something. In simple terms, processed data is information.
Knowledge: Knowledge is the processed facts that are understand for a conclusion.
1. An item's UPC number - data
Explanation: An item number is data because simple no processing is required.
2. Change back to customer - information
Explanation: Data about a customer is information.
3. General changes to demand in different seasons - knowledge
Explanation: Requires data (time and quantity purchased) to be processed/aggregated into information. The information is understood to provide a pattern of demad changes due to seasons.
4. Cost each - data
Explanation: Cost each is data because simple no processing is required.
5. Quantity purchased - data
Explanation: Cost each is data because simple no processing is required.
6. Non-taxable total - information
Explanation: -- requires that data (prices, amounts and whether the item is taxable) to be processed (price * amount for items that are non-taxable).
7. Extended cost [quantity times cost each] - information
Explanation: Extended cost requires processing two pieces of data quantity and cost
8. Amount tendered - data
Explanation: Amount tendered is data because simple no processing is required.
9. Sales of an item for the last week - information
Explanation: Sales of an item for the last week requires aggregating sales for a specific time frame together
10. Upcoming holidays and customer's special needs - knowledge
Explanation: Upcoming holidays and customer's special needs requires holiday data (dates) to be combined with information gathered about customer to understand customer's special needs
11. How paid [cash, charge card, debit card] - data
Explanation: Cost each is data because simple no processing is required.
12. Shopper loyalty card number - data
Explanation: Cost each is data because simple no processing is required.
13. Taxable total - information
Explanation: Taxable total requires that data (prices, amounts and whether the item is taxable) to be processed (price * amount for items that are taxable).
The laptop has a built-in wireless adapter or the wireless adapter is physically installed on a computer and it does not appear in Network Connections. What is most likely the problem when it does not show in Network Connections
Answer:
The wireless adapter driver software.
Explanation:
All computer systems are composed of hardware and software components. The hardware components is driven by the software components.
The operating system software is the mainly software component of the computer system, which creates the proper environment to run application software. It also runs the activities the hardware with the connection called the kernel.
Kernels are device drivers that runs the hardware components. The wireless adapter is the hardware that needs the wireless adapter driver to be recognised run by the computer.
A 1 MB digital file needs to transmit a channel with bandwidth of 10 MHz and the SNR is 10 dB. What is the minimum amount of time required for the file to be completely transferred to the destination?
Answer:
A 1 MB digital file needs 0.23 seconds to transfer over a channel with bandwidth 10 MHz and SNR 10 dB.
Explanation:
We can calculate the channel capacity using Shannon's Capacity formula:
C = B + log₂ (1 + SNR)
Where C = Channel Capacity
B = Bandwidth of the Channel
SNR = Signal to Noise Ratio
We are given SNR in dB so we need to convert it into a ratio.
[tex]SNR_{dB}[/tex] = 10log₁₀ (SNR)
10 = 10log₁₀ (SNR)
1 = log₁₀ (SNR)
SNR = 10¹
SNR = 10
So, using Shannon Channel Capacity formula:
C = 10 x 10⁶ log₂ (1 + 10)
C = 34.5 MHz
Total amount of time required to transmit a 1MB file:
1MB = 1 x 8 Mbytes = 8Mb
C = 34.5 MHz = 34.5 Mb/s
Time required = 8Mb/34.5Mb/s = 0.23 seconds
A 1 MB digital file needs 0.23 seconds to transfer over a channel with bandwidth 10 MHz and SNR 10 dB.
Design and implement a program (name it SumValue) that reads three integers (say X, Y, and Z) and prints out their values on separate lines with proper labels, followed by their average with proper label. Comment your code properly. Format the outputs following the sample runs below.
Answer:
//import Scanner class to allow the program receive user input
import java.util.Scanner;
//the class SumValue is define
public class SumValue {
// main method that signify the beginning of program execution
public static void main(String args[]) {
// scanner object scan is defined
Scanner scan = new Scanner(System.in);
// prompt asking the user to enter value of integer X
System.out.println("Enter the value of X: ");
// the received value is stored in X
int X = scan.nextInt();
// prompt asking the user to enter value of integer Y
System.out.println("Enter the value of Y: ");
// the received value is stored in Y
int Y = scan.nextInt();
// prompt asking the user to enter value of integer Z
System.out.println("Enter the value of Z: ");
// the received value is stored in Z
int Z = scan.nextInt();
// The value of X is displayed
System.out.println("The value of X is: " + X);
// The value of Y is displayed
System.out.println("The value of Y is: " + Y);
// The value of Z is displayed
System.out.println("The value of Z is: " + Z);
// The average of the three numbers is calculated
int average = (X + Y + Z) / 3;
// The average of the three numbers is displayed
System.out.println("The average of " + X + ", " + Y + " and " + Z + " is: " + average);
}
}
Explanation:
Load the titanic sample dataset from the Seaborn library into Python using a Pandas dataframe, and visualize the dataset. Create a distribution plot (histogram) of survival conditional on age and gender
Answer:
Following is given the data as required.
The images for histograms for age and gender are also attached below.
I hope it will help you!
Explanation:
Convert the value of the following binary numbers to hexadecimal notation. (Note: this question has 2 parts; you must answer each part correctly to receive full marks. Do not include spaces, commas or subscripts in your answer.)
a. 11012 =
b. 111011102 =
Answer:
Explanation: Where binary numbers are made up of 0s and 1s, numbers in hexadecimal (base 16) contains digits from 0 to 9 as well as letters from A to F. Any number gotten from applying the placeholders (8,4,2,1) that is above 9 is changed into letters. Thus: 10 = A; 11 = B; 12 = C; 13 = D; 14 = E & 15 = F
Solving the question, we split the binaries groups of fours while adding 0s from the left hand side of incomplete groups of four to make it up to four.
I would place the placeholders in brackets for example 1(8) should be read as "number of 8s is 1; 0(2) as " number of 2s is 0"
1. 1101 in base to to base 16 = 1(8) 1(4) 0(2) 1(1)
= 8 + 4 + 0 + 1 = 13 = D
Therefore, 1101 base 2 is D in hexadecimal
2. 11101110 = 1110 & 1110 {group of four}
1110 = 1(8) 1(4) 1(2) 0(1)
= 8 + 4 + 2 + 0 = 14 = E
Therefore, 11101110 base 2 = EE in hexadecimal
In C#Write the program SubscriptExceptionTest in which you use an array of 10 doubles. Write a try block in which you place a loop that prompts the user for a subscript value and displays the value stored in the corresponding array position or asks the user to quit the program by entering 99. Create a catch block that catches any IndexOutOfRangeException and displays the message: Index was outside the bounds of the array.
Answer:
using System;
namespace ConsoleApp3
{
class Program
{
static void Main(string[] args)
{
double[] doubleArray = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0 };
Console.WriteLine("Double Array values are:");
foreach (var b in doubleArray)
{
Console.WriteLine(b);
}
Console.WriteLine("Enter value to find position in Array");
var input = Console.ReadLine();
var value = Convert.ToDouble(input);
if (value == 99.0)
{
Environment.Exit(0);
}
try
{
var index = Array.IndexOf(doubleArray, value);
if (index == -1)
{
Console.WriteLine("Index was outside the bounds of the array");
Console.ReadLine();
}
else
{
Console.WriteLine("Position in Array is:" + index);
Console.ReadLine();
}
}
catch (Exception e)
{
Console.WriteLine("Index was outside the bounds of the array");
Console.ReadLine();
}
}
}
}
Explanation:
this is the code of console program which initialize the double array from 1-10 and displays the existing values of array in console.
Then it will take input from user, convert it to double and find the value position in double array.
if 99, then program will be exist
if exist in array:display the index position
else:index was outside the bounds of the array in try catch block.
Consider a system that contains 32K bytes. Assume we are using byte addressing, that is assume that each byte will need to have its own address, and therefore we will need 32K different addresses. For convenience, all addresses will have the same number n , of bits, and n should be as small as possible. What is the value of n ?
Answer:
n = 15
Explanation:
Using
Given
Number of bytes = 32k
At the smallest scale in the computer, information is stored as bits and bytes.
In the cases when used to describe data storage bits/bytes are calculated as follows:
Number of bytes when n = 1 is 2¹ = 2 bytes
When n = 2, number of bytes = 2² = 4 bytes
n = 3, number of bytes = 2³ = 8 bytes
So, the general formula is
Number of bytes = 2^n
In this case
2^n = 32k
Note that 1k = 1024 bytes,
So, 32k = 32 * 1024 bytes
Thus, 2^n = 32 * 1024
2^n = 2^5 * 2^10
2^n = 2^15
n = 15.
Final answer:
To address 32K bytes uniquely using byte addressing, 15 bits are required which [tex]2^{15}[/tex] equals 32768, the number of bytes in 32K. This demonstrates a fundamental concept of how memory is addressed in computing.
Explanation:
Understanding the minimum number of bits required to represent a certain amount of memory is a fundamental concept in computer science. To represent 32K bytes where 'K' stands for kilo (1024) due to binary base, we need to calculate the minimum number of bits (n) to address each byte. Essentially, 32K bytes equals 32 * 1024 = 32768 bytes. The question is how many bits are required to uniquely address each of these bytes.
To find the value of n, we rely on the principle that each bit can represent 2 states. Therefore, [tex]2^{n}[/tex] should be equal to or greater than 32768. Calculating this, we see that [tex]2^{15}[/tex] = 32768 exactly, indicating that 15 bits are sufficient to address 32K bytes uniquely. Thus, n = 15.
This example highlights how binary representation and addressing work in computing, illustrating why understanding of binary and byte addressing is crucial in fields related to computers and technology.
Some architectures support the ‘memory indirect’ addressing mode. Below is an example. In this case, the register R2contains a pointer to a pointer. Two memory accesses are required to load the data. ADD R3, @(R2)The MIPS CPU doesn’t support this addressing mode. Write a MIPS code that’s equivalent to the instruction above. The pointer-to-pointer is in register $t1. The other data is in register $t4.
Answer:
Following is given the solution to question I hope it will make the concept easier!
Explanation:
How does a MIPS Assembly procedure return to the caller? (you only need to write a single .text instruction).
Answer:
A MIPS Assembly procedure return to the caller by having the caller pass an output pointer (to an already-allocated array).
Write a function solution that returns an arbitrary integer which is greater than n.
Answer:
public static int greaterThanInt(int n){
return n+10;
}
Explanation:
This is a very simple method in Java. it will accept an argument which is an integer n and return n+10 since the question requires that an arbitrary integer greater than n be returned adding any int value to n will make it greater than n.
A complete java program calling the method is given below:
import java.util.Scanner;
public class ANot {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("Please enter an integer");
int n = in.nextInt();
int greaterInt = greaterThanInt(n);
System.out.println("You entered "+n+", "+greaterInt+" is larger than it");
}
public static int greaterThanInt(int n){
return n+10;
}
}
If you hear that an airplane crashes into the Empire State Building, and you immediately think of the 9/11 terrorist attack on the World Trade Center, you are reacting to what type of memory? a repressed memory a suppressed memory a flashbulb memory a pseudo-memory
Final answer:
If you think of the 9/11 terrorist attack when hearing about an airplane crashing into the Empire State Building, you are reacting to a flashbulb memory.
Explanation:
If you hear that an airplane crashed into the Empire State Building and immediately think of the 9/11 terrorist attack on the World Trade Center, you are reacting to a memory known as flashbulb memory. A flashbulb memory is an exceptionally clear recollection of an important and emotionally charged event.
Thus, a flashbulb memory is a vivid, detailed, and long-lasting recollection of the circumstances surrounding a significant, emotionally charged event. Many people remember exactly where they were and how they heard about significant events like 9/11, even years later. These memories can be vivid and distinct, often accompanied by strong emotions.
The type of memory you are experiencing is called a flashbulb memory so the correct option is C. a flashbulb memory.
If you hear that an airplane crashes into the Empire State Building and immediately think of the 9/11 terrorist attack on the World Trade Center, you are reacting to a flashbulb memory. It is a vivid and emotional memory of an unusual event that people believe they remember well. This memory is related to the strong emotional impact of the event, such as the 9/11 terrorist attack.A flashbulb memory is an exceptionally clear and vivid memory of an important and emotional event that people often believe they remember very well.For example, many people can recall exactly where they were and what they were doing when they first heard about the 9/11 attacks. These types of memories are characterized by their strong emotional associations and are typically remembered in great detail, though they are not immune to inaccuracies over time.Complete question:
If you hear that an airplane crashes into the Empire State Building, and you immediately think of the 9/11 terrorist attack on the World Trade Center, you are reacting to what type of memory?
A. a repressed memory
B. a suppressed memory
C. a flashbulb memory
D. a pseudo-memory
Write statements that declare inFile to be an ifstream variable and outFile to be an ofstream variable.
Answer:
Following are the statement in the c++ language
ifstream inFile; // declared a variable inFile
ofstream outFile; //declared a variable outFile
Explanation:
The ifstream and ofstream is the file stream object in the c++ Programming language .The ifstream file stream object is used for reading the contents from the file whereas the ofstream file stream object is used for writting the contents into the file.
We can create the variable for the ifstream and ofstream These variable is used for reading and writing into the File.Following are the syntax to create the ifstream variable and ofstream variableifstream variablename;
ofstream variablename
Write a program whose input is a character and a string, and whose output indicates the number of times the character appears in the string.
Answer:
import java.util.Scanner;
public class ANot {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("Please enter a word");
String word = in.next();
System.out.println("Please enter a character");
char ca = in.next().charAt(0);
int countVariable = 0;
for(int i=0; i<word.length(); i++){
if(ca ==word.charAt(i))
countVariable++;
}
System.out.println(countVariable);
}
}
Explanation:
Using the Scanner Class prompt and receive the users input (the word and character). Save in seperate variablescreate a counter variable and initialize to 0Use a for loop to iterate over the entire length of the string.Using an if statement check if the character is equal to any character in string (Note that character casing upper or lower is not handled) and increase the count variable by 1print out the count variableWhy are user application configuration files saved in the user’s home directory and not under /etc with all the other system-wide configuration files? ____________________________________________________________________________________
Explanation:
The main reason why is because regular users don't have permission to write to /etc. Assuming this is Linux, it is a multi-user operating system. Meaning if there are user-application configuration files within /etc, it would prevent users from being able to customize their applications.
Write a Python function uniquely_sorted() that takes a list as a parameter, and returns the unique values in sorted order.
Answer:
Following is the program in Python language
def uniquely_sorted(lst1): #define the function uniquely_sorted
uni_que = [] #creating an array
for number in lst1: #itereating the loop
if number not in uni_que: #check the condition
uni_que.append(number)#calling the function
uni_que.sort() #calling the predefined function sort
return uni_que #returns the unique values in sorted order.
print(uniquely_sorted()([8, 6, 90, 76])) #calling the function uniquely_sorted()
Output:
[6,8,76,90]
Explanation:
Following are the description of the Python program
Create a functionuniquely_sorted() that takes "lst1" as a list parameter. Declared a uni_que[] array . Iterating the loop and transfer the value of "lst1" into "number" Inside the loop call, the append function .the append function is used for adding the element in the last position of the list. Call the predefined function sort(for sorting). Finally, call the function uniquely_sorted() inside the print function.
Hard drives are usually self-contained, sealed devices. Why must the case for the hard drive remain sealed closed?
Answer:
To avoid contact with any contaminants that might be able to destroy the data.
Explanation:
Hard drives are usually self-contained, sealed devices and the case for the hard drive must remain sealed closed to avoid contact with any contaminants that might be able to destroy the data.
In a point-to-point single network, how many physical links will there be when a packet is transmitted?
Answer:
One
Explanation:
A network is the interconnection and communication of two or more computer devices. Computer systems on a network shares resources with one another, using network standards like OSI and TCP/IP suite model and using the protocols on each layers.
There are two major types of network communication between devices and they are peer to peer or point to point Network and client-server network.
Point to point Network uses one secure physical link to connect two computers or routers in a network.
Explain why deploying software as a service can reduce the IT support costs for a company. What additional costs might arise if this deployment model is used?
Answer:
It reduces the cost of multiple subscription, but the cost of management is applied.
Explanation:
Cloud computing is the use of online resources like storage infrastructure available on database servers to hold company resources on a central level. There are various platforms available in adopting cloud services and they are SaaS or software as a service, PaaS, or platform as a service, IaaS or infrastructure as a service etc.
SaaS is a cloud computing services where software applications are made centrally available for an organisation. It reduces the cost of purchasing multiple activation keys for software traditionally installed. But it requires a skilled personnel and annual or monthly subscription, which when added together, might spike the cost of deployment.
____ was the first-generation cellular telephone system. a. Advanced Mobile Phone Service (AMPS) b. Global System for Mobile (GSM) Communications c. Time Division Multiple Access (TDMA) d. Personal Communications Services (PCS)
Answer:
Global system for mobile
Explanation:
Answer:
The answer is "Option b"
Explanation:
GSM is a cellular network system of the second generation, which is currently used in the world's. It is most useful in a telecommunications network. It is also regarded as open-ended and wireless cellular technology for mobile voice and data transmission, and certain choices were incorrect, which is explained as follows:
In option a, It is wrong because it is part of the first generation. In option c, It works on channels, that's why it is wrong. In option d, It is part of wireless communication, that's why it is wrong.Write a function called cipher(phrase,shift)that accepts two parameters: a string phrase and an integer shift.The integer shift can be positive, negative or zero.
Answer:
Following is given the code according to requirement.
The code is attached as an image so that the indentation is understood by the user. Comments are given inside the code where necessary.
The output of code is also attached as well in end.
I hope it will help you!
Explanation:
1. Write an expression whose value is the result of converting the str value associated with s to an int value. So if s were associated with "41" then the resulting int would be 41.2. Write an expression whose value is the last character in the str associated with s.
3. Given variables first and last, each of which is associated with a str, representing a first and a last name, respectively. Write an expression whose value is a str that is a full name of the form "Last, First". So, if first were associated with "alan" and last with "turing", then your expression would be "Turing,Alan". (Note the capitalization! Note: no spaces!) And if first and last were "Florean" and "fortescue" respectively, then your expression’s value would be "Fortescue,Florean".
4. Write an expression whose value is the result of converting the int value associated with x to a str. So if 582 was the int associated with x you would be converting it to the str "582".
5. Write an expression whose value is the str consisting of all the characters (starting with the sixth) of the str associated with s.
Answer:
The solution or expression for each part is given below:
int(s) s[len(s)-1] last.capitalize()+','+first.capitalize()str(x)s[5:]Explanation:
Following are attached the images that show how these expressions will be used. I hope they will make the concept clear.
All the images below are respective to the questions given.
Write pseudocode to represent the logic of a program that allows a user to enter three values then outputs the product of the three values. (If you're not sure of the definition of product be sure to look it up to verify its meaning.)
Final answer:
The pseudocode for a program that outputs the product of three user-entered values involves prompting the user for each value, calculating the product by multiplication, and displaying the result.
Explanation:
Writing Pseudocode for a Multiplication Program
The task is to write pseudocode that represents the logic of a program allowing a user to enter three values and then outputs the product of these values. The product refers to the result of multiplying the three numbers together. Below is the pseudocode for accomplishing this task:
START
Prompt user to enter the first value
Read firstValue
Prompt user to enter the second value
Read secondValue
Prompt user to enter the third value
Read thirdValue
Set product to firstValue multiplied by secondValue multiplied by thirdValue
Output product
END
This simple algorithm prompts the user to input three separate values and calculates the product by multiplying them together. The result is then displayed to the user.
Final answer:
The pseudocode for calculating the product of three user-entered values consists of reading the values, computing the product, and outputting the result.
Explanation:
The student is asking for pseudocode to calculate the product of three values entered by the user. Pseudocode is an informal way of programming description that does not require any strict programming language syntax, yet it describes the logic of the algorithm clearly. Below is an example of how this pseudocode might look:
START
Prompt user for first value
Read value1
Prompt user for second value
Read value2
Prompt user for third value
Read value3
Set product = value1 * value2 * value3
Output product
END
This pseudocode begins by prompting the user to enter three values. It then reads the values into three variables, calculates the product of these values by multiplying them, and finally outputs the product.
Compare the elements of the basic Software Development Life Cycle with 2 other models. How are they similar? How are they different? Write a paragraph for each of 3 models describing each. Then write a paragraph comparing the differences and similarities among the 3. Your submission should be 1-2 pages of discussion.
Answer:
Explanation:
One of the basic notions of the software development process is SDLC models which stands for Software Development Life Cycle models. SDLC – is a continuous process, which starts from the moment, when it’s made a decision to launch the project, and it ends at the moment of its full remove from the exploitation. There is no one single SDLC model. They are divided into main groups, each with its features and weaknesses. The most used, popular and important SDLC models are given below:
1. Waterfall model
2. Iterative model
3. Spiral model
4. V-shaped model
5. Agile model
Stage 1. Planning and requirement analysis
Each software development life cycle model starts with the analysis, in which the stakeholders of the process discuss the requirements for the final product.
Stage 2. Designing project architecture
At the second phase of the software development life cycle, the developers are actually designing the architecture. All the different technical questions that may appear on this stage are discussed by all the stakeholders, including the customer.
Stage 3. Development and programming
After the requirements approved, the process goes to the next stage – actual development. Programmers start here with the source code writing while keeping in mind previously defined requirements. The programming by itself assumes four stages
• Algorithm development
• Source code writing
• Compilation
• Testing and debugging
Stage 4. Testing
The testing phase includes the debugging process. All the code flaws missed during the development are detected here, documented, and passed back to the developers to fix.
Stage 5. Deployment
When the program is finalized and has no critical issues – it is time to launch it for the end users.
SDLC MODELS
Waterfall – is a cascade SDLC model, in which development process looks like the flow, moving step by step through the phases of analysis, projecting, realization, testing, implementation, and support. This SDLC model includes gradual execution of every stage completely. This process is strictly documented and predefined with features expected to every phase of this software development life cycle model.
ADVANTAGES
Simple to use and understand
DISADVANTAGES
The software is ready only after the last stage is over
ADVANTAGES
Management simplicity thanks to its rigidity: every phase has a defined result and process review
DISADVANTAGES
High risks and uncertainty
Iterative SDLC Model
The Iterative SDLC model does not need the full list of requirements before the project starts. The development process may start with the requirements to the functional part, which can be expanded later.
ADVANTAGES
Some functions can be quickly be developed at the beginning of the development lifecycle
DISADVANTAGES
Iterative model requires more resources than the waterfall model
The paralleled development can be applied Constant management is required
Spiral SDLC Model
Spiral model – is SDLC model, which combines architecture and prototyping by stages. It is a combination of the Iterative and Waterfall SDLC models with the significant accent on the risk analysis.
The effectiveness of a(n) _____ process is essential to ensure the success of a data warehouse. Select one: a. visual basic b. extract-transform-load c. chamfering d. actuating
Answer:
B. Extract-transform-load
Explanation:
Extract, transform, load (ETL) and Extract, load, transform (E-LT) are the two main approaches used to ensure the success of a data warehouse system.
An extract-transform-load (ETL) process is used to pull data from disparate data sources to populate and maintain the data warehouse. An effective extract-transform-load (ETL) process is essential to ensure data warehouse success.
Option A (Visual Basic) is an example of programming language.
Answer:
b. extract-transform-load
Explanation:
A data warehouse is a repository of data gathered from other data sources, to provide a medium of central data streaming for data analysis and reporting purposes. It hold data from multiple source, where the data are extracted, transformed and loaded to the data warehouse.
ETL or extract-transform-load is very important for the successful implementation of data warehousing
What policy definition defines the standards, procedures, and guidelines for how employees are to be granted and authorized access to internal IT resources through the public Internet?
Answer:
Explanation:
Regularly in a company the senior management establish the policy and standards about the network and the employees, we can find different kind of these standards, for example:
Policies
RegulatoryAdvisoryInformativeSecurity policies
OrganizationalIssue-specificSystem-specificStandards
Actions or rulesSupportInternal or externalRe-write the following arithmetic expressions as Scheme expressions and show the result of the Scheme interpreter when invoked on your expressions. (a) (22+42) (54 x 99).(b) ((22+42) x 54) x 99. (c) 64 x 102 + 16 x (44/22).
Answer:
See Answer Below:
Explanation:
a) (22+42) (54 x 99)
= (22 + 42) × (54 × 99)
(* (+ 22 42)
(* 54 99))
(b) ((22+42) x 54) x 99
= (* (* (+ 22 42)
54
99)
(c) 64 x 102 + 16 x (44/22)
= (+ (* 64 102)
(* 16
(/ 44 22) ) )
Implement the function calcWordFrequencies() that uses a single prompt to read a list of words (separated by spaces). Then, the function outputs those words and their frequencies to the console.
Ex: If the prompt input is:
hey hi Mark hi mark
the console output is:
hey 1
hi 2
Mark 1
hi 2
mark 1
Final answer:
The function calcWordFrequencies prompts for input, splits the input into words, counts their occurrences using an object, and logs each word along with its frequency to the console.
Explanation:
To implement the function calcWordFrequencies that reads a list of words separated by spaces and outputs their frequencies, you can use a programming language like JavaScript. The function will prompt the user for input, then split the input string by spaces to get an array of words. After that, the function will count the occurrences of each word using an object to store the frequencies, and finally, it will log the words and their respective frequencies to the console.
Here is an example of how this function might look:
function calcWordFrequencies() {
var input = prompt('Enter a list of words separated by spaces:');
var words = input.split(' ');
var frequencies = {};
for (var i = 0; i < words.length; i++) {
var word = words[i].toLowerCase();
frequencies[word] = (frequencies[word] || 0) + 1;
}
for (var word in frequencies) {
console.log(word + ' ' + frequencies[word]);
}
}
Note: The example above converts all words to lowercase to count 'Mark' and 'mark' as two occurrences of the same word. You can remove the toLowerCase call if you want to distinguish between capitalized and lowercase words.
Final answer:
To count word frequencies in Python, use the input() function to collect user input, split the input into words, use a dictionary to track frequencies, then iterate and print each word with its frequency.
Explanation:
To implement the function calcWordFrequencies that reads a list of words from the user and outputs the frequency of each word, you can follow these steps in Python:
Use the input() function to prompt the user to enter a list of words separated by spaces.Create an empty dictionary to keep track of word frequencies.Split the input string into words using the split() method.Iterate over the list of words and for each word: If the word is already in the dictionary, increment its frequency.If the word is not in the dictionary, add it with a frequency of 1.Iterate over the dictionary and print each word along with its frequency.Here is an example code snippet that demonstrates these steps:
def calcWordFrequencies():5)What are the differences in the function calls between the four member functions of the Shape class below?void Shape::member(Shape s1, Shape s2);void Shape::member(Shape *s1, Shape *s2);void Shape::member(Shape& s1, Shape& s2) const;void Shape::member(const Shape& s1, const Shape& s2);void Shape::member(const Shape& s1, const Shape& s2) const;
Answer:
void Shape :: member ( Shape s1, Shape s2 ) ; // pass by value
void Shape :: member ( Shape *s1, Shape *s2 ) ; // pass by pointer
void Shape :: member ( Shape& s1, Shape& s2 ) const ; // pass by reference
void Shape :: member ( const Shape& s1, const Shape& s2 ) ; // pass by const reference
void Shape :: member ( const Shape& s1, const Shape& s2 ) const ; // plus the function is const
Explanation:
void Shape :: member ( Shape s1, Shape s2 ) ; // pass by value
The s1 and s2 objects are passed by value as there is no * or & sign with them. If any change is made to s1 or s2 object, there will not be any change to the original object.
void Shape :: member ( Shape *s1, Shape *s2 ) ; // pass by pointer
The s1 and s2 objects are passed by pointer as there is a * sign and not & sign with them. If any change is made to s1 or s2 object, there will be a change to the original object.
void Shape :: member ( Shape& s1, Shape& s2 ) const ; // pass by reference
The s1 and s2 objects are passed by reference as there is a & sign and not * sign with them. If any change is made to s1 or s2 object.
void Shape :: member ( const Shape& s1, const Shape& s2 ) ; // pass by const reference
The s1 and s2 objects are passed by reference as there is a & sign and not * sign with them. The major change is the usage of const keyword here. Const keyword restricts us so we cannot make any change to s1 or s2 object.
void Shape :: member ( const Shape& s1, const Shape& s2 ) const ; // plus the function is const
The s1 and s2 objects are passed by reference as there is a & sign and not * sign with them. const keyword restricts us so we cannot make any change to s1 or s2 object as well as the Shape function itself.