C# Basics and Operations

What is the correct way to declare a variable in C#?

• var age;

• string age = 25;

• float age;

• int age;

Which of the following is a valid data type in C#?

• char*

• int

• string[]

• float

What operator is used for addition in C#?

• /

• *

• +

• -

How do you declare a function in C#?

• public returnType functionName(parameterType parameterName) { // function body }

• functionName(parameterType parameterName) { // function body }

• public functionName(parameterType) { // function body }

• returnType functionName(parameterType parameterName)

What is the default value of an integer variable in C#?

• 1

• null

• -1

• 0

Which keyword is used to define a constant in C#?

• static

• final

• immutable

• const

What is the result of 5 / 2 in C#?

• 2

• 1

• 2.5

• 3

How do you create a string variable in C#?

• string myString = Hello World!;

• string myString = 'Hello, World!';

• myString = 'Hello, World!';

• string myString = "Hello, World!";

What data type would you use for a true/false value in C#?

• string

• int

• float

• bool

Which operator is used for concatenation of strings in C#?

• &

• ||

• +

• -