C# Data Types Quiz

Questions and Answers

What are the two main categories of data types in C#? (Select all that apply)

Value types and reference types (correct)

Mutable types and immutable types

Primitive types and complex types

Static types and dynamic types

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

delegate

interface

struct (correct)

class

How are reference types stored in memory?

They are stored in registers

They contain the actual data within their own memory allocation

They are stored in the stack

They contain a pointer to another memory location that holds the actual data (correct)

What is the primary characteristic of a string in C#?

Strings are immutable Signup and view all the answers

Can a record in C# be a value type?

Yes, a record can be either a struct (value type) or a class (reference type) Signup and view all the answers

What is the difference between value types and reference types in terms of memory allocation?

Value types hold the data within their own memory allocation, while reference types contain a pointer to another memory location Signup and view all the answers

Can a string be modified after its creation in C#?

No, strings are immutable in C# Signup and view all the answers

How are arrays classified in C#?

As non-primitive types, also known as reference types Signup and view all the answers

Study Notes

Data Types in C#

Two primary categories: value types and reference types.
Value types hold their data directly, while reference types store a pointer to the data's memory location.

Value Types

Examples of value types include struct.
Each value type has its own memory allocation, holding the actual data.

Reference Types

Example of reference types includes class, interface, and delegate.
They are stored in the heap and contain a pointer to the actual data's memory location.

Strings in C#

Strings are immutable, meaning once created, their contents cannot be modified.
Strings are considered reference types as they do not hold the data directly within their own memory allocation.

Records in C#

Records can be either value types (as structs) or reference types (as classes).
They provide a way to define immutable data structures.

Memory Allocation Differences

Value types are typically allocated on the stack, while reference types are allocated on the heap.
Value types contain the actual data; reference types contain a reference to that data's location.

Modification of Strings

Strings in C# cannot be modified after creation due to their immutable nature.
Any "modification" results in the creation of a new string instance.

Arrays in C#

Arrays are classified as non-primitive types and are considered reference types.
Although they may behave similarly to value types in syntax, they store references to their elements in the heap.

Description

Test your knowledge on the main categories of data types in C#. This quiz covers fundamental concepts, including value types, reference types, and their characteristics. Perfect for beginners and those looking to refresh their understanding of C#.