C# Skill Review

C# class can inherit multiple ________

• Interfaces

• Classes

• Abstract classes

• Static classes

Which of the followings are value types in C#?

• Int32

• Double

• Decimal

• All of these options

Which of the following is a reference type in C#?

• String

• Long

• Boolean

• None

What is Nullable type?

• It allows assignment of null to reference type.

• It allows assignment of null to value type.

• It allows assignment of null to static class.

• None

Struct is a _____.

• Reference type

• Class type

• Value type

• String type

10 > 9 ? "10 is greater than 9” : "9 is greater than 10” is an example of _______

• Inverse operator

• Conditional operator

• Greater than operator

• Ternary operator

Which of the following datatype can be used with enum?

• Int

• String

• Boolean

• All of these options

What is indexer?

• It allows enumerator with class

• It creates index for instances of a class.

• It allows an instance of a class to be indexed like an array

• None

String data type is ______.

• Mutable

• Immutable

• Static

• Value type

An array in C# starts with _____ index.

• 1

• 0

• -1

• null