VGP 3rd 6-Weeks Test Review 20/21

Which operator can be used to compare two values?

==

The value of a string variable can be surrounded by single quotes.

False

How do you create a variable with the numeric value 5?

int x = 5:

What is the correct syntax to output "Hello World" in C#?

Console.WriteLine("Hello World");

How do you insert COMMENTS in C# code?

//

What would the expected output be if the user entered a, b, c? using System; public class Exercise1 { public static void Main() { char letter1,letter2,letter3; Console.Write("Input letter: "); letter1 = Convert.ToChar(Console.ReadLine()); Console.Write("Input letter: "); letter2 = Convert.ToChar(Console.ReadLine()); Console.Write("Input letter: "); letter3 = Convert.ToChar(Console.ReadLine()); Console.WriteLine(letter3 + " " + letter2, + " " + letter1); } }

c b a

Which keyword is used to create a class in C#?

class

How do you create a variable with the floating number 2.8?

double x = 2.8D;

How do you start writing an if statement in C#?

if x > y

Which access modifier makes the code only accessible within the same class?

private

How do you insert COMMENTS in C# code?

string

What is the expected output of the following program if the user enters 32? using System; public class Exercise11 { public static void Main() { int age; Console.Write("Enter your age "); age = Convert.ToInt32(Console.ReadLine()); Console.Write("You look younger than {0} ",age); } }

Enter your age 32 You look older than 32

Which operator is used to add together two values?

The + sign

What is the expected output of the following program if the user entered -5 and 25? using System; public class Exercise18 { static void Main(string[] args) { Console.WriteLine("\nInput first integer:"); int x = Convert.ToInt32(Console.ReadLine()); Console.WriteLine("Input second integer:"); int y = Convert.ToInt32(Console.ReadLine()); Console.WriteLine("Check if one is negative and one is positive:"); Console.WriteLine((x < 0 && y > 0) || (x > 0 && y < 0)); } }

True

What is the expected output of the following program? using System; class Program { static void Main(string[] args) { Console.WriteLine(test(30, 0)); Console.WriteLine(test(25, 5)); Console.WriteLine(test(20, 30)); Console.WriteLine(test(20, 25)); Console.ReadLine(); } public static bool test(int x, int y) { return x == 30 || y == 30 || (x + y == 30); } }

True True True False