Why does a computer need an operating system?

​

Answer:

An operating system helps it to manage and run its designed duties.

If it lacks an operating system, it wouldn't be able to work

What is the best data type for nationality field

Should people who are able to break a hashing algorithm be allowed to post their findings on the Internet?

Discuss some of the reasons you feel that people have for either liking or disliking Excel

The ______ Works on a single variable or constant. *​

Which device can perform both input and output functions?

Kiểm tra cặp số hứa hôn
Đầu vào : số nguyên n,m
Đầu ra : in ra n,m là cặp số hứa hôn và in ra không là số hứa hôn nếu ngược lại

True or False? Voice recognition is the process of determining the meaning of the words spoken by a human.

Write SQL queries to answer the following questions: (15 points) a. Which students have an ID number that is less than 50000

stages of IT revolution​

how can computers be a threat to public safety??

help asap marking brainiest ​

Consider the conditions and intentions behind the creation of the internet—that it was initially created as a tool for academics and federal problem-solvers. How might that explain some of the security vulnerabilities present in the “cloud” today?

You modified the GreenvilleRevenue program to include a number of methods. Now modify every data entry statement to use a TryParse() method to ensure that each piece of data is the correct type. Any invalid user entries should generate an appropriate message, and the user should be required to reenter the data.
using System;
using static System.Console;
class GreenvilleRevenue
{
static void Main(string[] args)
{
const int fee = 25;
int lastYearsContestants;
int thisYearsContestants;
const int LOW = 0;
const int HIGH = 30;
int other = 0;
int dancer = 0;
int musician = 0;
int singer = 0;
WriteLine("**********************************");
WriteLine("* The stars shine in Greenville. *");
WriteLine("**********************************");
WriteLine("");
lastYearsContestants = getContestantsNum(message, LOW, HIGH);
string[] contestant = new string[thisYearsContestants];
string[] talent = new string[thisYearsContestants];
getContestantsInfo(contestant, talent);
for (int x = 0; x < talent.Length; ++x)
{
if (talent[x] == "O")
{
++other;
}
else if (talent[x] == "S")
{
++singer;
}
else if (talent[x] == "D")
{
++dancer;
}
else if (talent[x] == "M")
{
++musician;
}
}
Clear();
WriteLine("Currently signed up, there are..");
WriteLine("{0} dancers", dancer);
WriteLine("{0} singers", singer);
WriteLine("{0} musicians", musician);
WriteLine("{0} everything else!", other);
contestantByTalent(contestant, talent);
Clear();
contestantInfo(thisYearsContestants, lastYearsContestants, fee);
}
static int getContestantsNum(string message, int LOW, int HIGH)
{
WriteLine("Please enter the number of contestants for last year.>>");
string input = ReadLine();
int contestantsNum = Convert.ToInt32(input);
while (contestantsNum < LOW || contestantsNum > HIGH)
{
WriteLine("Valid numbers are 0 through 30, Please try again.>>");
contestantsNum = Convert.ToInt32(ReadLine());
}
return contestantsNum;
WriteLine("Please enter the number of contestants for this year.>>");
string input = ReadLine();
int contestantsNum = Convert.ToInt32(input);
while (contestantsNum < LOW || contestantsNum > HIGH)
{
WriteLine("Valid numbers are 0 through 30, Please try again.>>");
contestantsNum = Convert.ToInt32(ReadLine());
}
return contestantsNum;
}
static string getTalent(int contestantsNum)
{
bool correct = false;
string talentType = "";
while (!correct)
{
WriteLine("What is contestant " + contestantsNum + "'s skill? Please enter 'S' for Singer, 'D' for Dancer, 'M' for " +
"Musician, 'O' for Other.>>");
talentType = ReadLine().ToUpper();
if (talentType == "S" || talentType == "D" || talentType == "M" || talentType == "O")
{
correct = true;
}
else
{
WriteLine("Please enter a valid response.>>");
}
}
return talentType;
}
static void contestantByTalent(string[] contestant, string[] talent)
{
WriteLine ("To see a list of all contestants with a specific talent, Please enter a talent code.talent codes are(S)inger, (D)ancer, (M)usician, (O)ther; altenatively, you may type (E) to exit.>>");
string entry = ReadLine().ToUpper();
while (entry != "E")
{
if (entry != "S" && entry != "D" && entry != "M" && entry != "O")
{
WriteLine("That wasn't a valid talent code. Valid talent codes are (S)inger, (D)ancer, (M)usician, (O)ther; altenatively, you may type (E) to exit.>>");
entry = ReadLine().ToUpper();
if (entry == "E")
break;
}
for (int x = 0; x < talent.Length; ++x)
{
if (entry == talent[x])
WriteLine("Contestant " + contestant[x] + " talent " + talent[x]);
}
WriteLine("To see a list of all contestants with a specific talent, Please enter a talent code. talent codes are (S)inger, (D)ancer, (M)usician, (O)ther; altenatively, you may type (E) to exit.>>");
entry = ReadLine().ToUpper();
}
}
static void getContestantsInfo(string[] contestant, string[] talent)
{
for (int x = 0; x < contestant.Length; ++x)
{
WriteLine("What is the name for Contestant " + (x + 1) + "?");
contestant[x] = ReadLine();
talent[x] = getTalent(x + 1);
}
}
static void contestantInfo (int thisYearsContestants, int lastYearsContestants, int fee)
{
if (thisYearsContestants > lastYearsContestants * 2)
{
WriteLine("The competition is more than twice as big this year!");
WriteLine("The expected revenue for this year's competition is {0:C}", (thisYearsContestants * fee));
}
else
if (thisYearsContestants > lastYearsContestants && thisYearsContestants <= (lastYearsContestants * 2))
{
WriteLine("The competition is bigger than ever!");
WriteLine("The expected revenue for this year's competition is {0:C}", (thisYearsContestants * fee));
}
else
if (thisYearsContestants < lastYearsContestants)
{
WriteLine("A tighter race this year! Come out and cast your vote!");
WriteLine("The expected revenue for this year's competition is {0:C}.", (thisYearsContestants * fee));
}
}
}

Which statement best explains how the main idea relates to taking notes?

The main idea is always included in effective notes.
The main idea is always easy to identify.
The main idea is rarely used as a title for notes.
The main idea is rarely identified by listening or reading

50 free po.intssssssss!

LIst types of computer process ?

Create a program that uses an array of Shape references to objects of each concrete class in the hierarchy (see program-2). The program should print a text description of the object to which each array element refers. Also, in the loop that processes all the shapes in the array, determine the size of each shape If it‟s a TwoDimensionalShape, display its area. If it‟s a ThreeDimensionalShape, display its area and volum ​

Tamanika got a raise in her hourly pay, from $15.90 to $17.65. Find the percent increase

1. Which of the following options can you use to format the contents of a cell?
Select all that apply.
a. Font Size
b. Sort
C. Italic
d. Underline

WORTH 75 POINTS!!
Which best describes the video encoding process?

converting analog video into digital video

filming a video at 30 frames per second

saving a digital video in a specific file format

watching a video while the file downloads

Question # 1 Multiple Select Which features are important when you plan a program? Select 4 options. Knowing what information is needed to find the result. Knowing what information is needed to find the result. Knowing what the user needs the program to accomplish. Knowing what the user needs the program to accomplish. Knowing how many lines of code you are allowed to use. Knowing how many lines of code you are allowed to use. Knowing what you want the program to do. Knowing what you want the program to do. Knowing how to find the result needed. Knowing how to find the result needed.

Problem: For multi access control, there are two approaches, those based on channel partitioning, and those based on random access. In packet switching, there are two rather similar approaches as well, namely, circuit switching and package switching. Discuss the similarities and differences in these two problem domains and the corresponding approaches g

Find the error and rewrite the code with the error fixed.
// INSTANCE VARIABLE

public class Main {



public static void main(String[] args) {



Product prod1 = new Product();

prod1.Barcode = 123456;



Product prod2 = new Product();

prod2.Barcode = 987654;



System.out.println(prod1.Barcode);

System.out.println(prod2.Barcode);

}

}



public class Product {

public int Barcode;

}

discuss with illustrations how to implement a simple home network ​

Write a program, using case statements, that mimics a calculator. The program should take as input two integers and the operation to be performed. It should then output the numbers, the operator, and the result. For division, of the denominator is zero, output an appropriate message.

Partially-filled Arrays
Write the function rindby() which stands for remove mark>if not divisiby by. The function removes all elements from the array that are not evenly divisible by the argument n. You can find out if a number is evenly divisible by n using the remainder operator: % (there will be nothing left over).
The function returns the number of items removed or -1 if the array was originally empty.
The function takes 3 arguments:
the array of int that may be modified.
the size of the array (use size_t as the type)
the int n used to check for divisibility
Here are two short examples:
int a[] = {2, 3, 4, 5, 6};
size_t size = 5;
int removed = rindby(a, size, 2);
// removed->2, a = [2, 4, 6], size = 3
size = 0;
removed = rindby(a, size, 3);
// removed-> -1, no change otherwise
In the first case, the numbers 3 and 5 are removed because they are not divisible by 2. Only the numbers that are divisible by 2 are left in the array.
In the second, size has been set to , so the input array is empty and the function returns - 1.
Exam C++ Quick Reference
p1.cpp
1 #include // size_t for sizes and indexes
2 using namespace std;
3
4 ////////////////WRITE YOUR FUNCTION BELOW THIS LINE ///////////////
5 int rindby(int all, size_t& size, int number)
6 {
7 int result;
8 // Add your code here
9 return result;
10 }
11

F= A· (B+C). draw the symbol for the logic gate​

In a _____, there is no skipping or repeating instructions. A. iteration B. sequence C. selection D. conditional

Why do some computer systems not allow users to activate macros?
O Amacro can be used by only one person.
0 You must close all other programs to run a macro.
O The Word software does not work well with macros.
O Macros can carry viruses that can harm a computer.

The _______ is responsible for fetching program instructions, decoding each one, and performing the indicated sequence of operations.

Which two are computing devices? (Choose two)
A. Unix
B. Laptop
C. Server
D. Mac OS