Basic C# intro

Which of the following is used for a single-line comment in C#?

• /*

• //

• <!--

• /**

What is the correct syntax for a multi-line comment in C#?

• /* Comment */

• <!-- Comment -->

• // Comment //

• /* Comment */

Which of the following is a valid declaration of a variable in C#?

• int 1number;

• int number;

• var int number;

• int = number;

What type of variable would you use to store the value true or false?

• string

• int

• bool

• float

What will happen if a local variable is accessed outside its scope?

• It will return a default value.

• It will throw a compile-time error.

• It will automatically be promoted to a global variable.

• It will execute without errors.

Which type of conversion does not require explicit casting?

• Implicit conversion

• Explicit conversion

• Typecasting

• Parsing

What is the output of the following code?

• 10

• 10.5

• 11

• compile-time error

Which of the following is the correct syntax for an if statement in C#?

• if x > 5 { Console.WriteLine(x); }

• if (x > 5) Console.WriteLine(x);

• if (x > 5) { Console.WriteLine(x); }

• if (x > 5); { Console.WriteLine(x); }

What does the following code print?

• Greater

• Smaller

• True

• False

Which keyword is used in C# to exit a switch statement?

• return

• exit

• break

• continue