Why collections over arrays in C Sharp (C#) - Quick Recap

Recall & Review

beginner

What is a key limitation of arrays compared to collections in C#?

Arrays have a fixed size, meaning once created, their length cannot change. Collections can grow or shrink dynamically.

beginner

How do collections improve code flexibility over arrays?

Collections provide methods to add, remove, and search items easily, making code more adaptable to changing data.

beginner

Name a common collection type in C# that is preferred over arrays for dynamic data.

List<T> is a common collection that allows dynamic resizing and easy manipulation of elements.

intermediate

Why might you choose an array over a collection in C#?

Arrays can be more efficient in memory and performance when the size is fixed and known in advance.

intermediate

Explain how collections support better code readability compared to arrays.

Collections have built-in methods with clear names like Add, Remove, and Contains, making code easier to understand than manual array management.

Which of the following is true about arrays in C#?

A They have a fixed size once created.

B Their size can be changed after creation.

C They provide built-in methods like Add and Remove.

D They are always slower than collections.

Arrays have a fixed size once created and do not provide methods like Add or Remove.

What is a main advantage of using List<T> over arrays?

A List<T> has a fixed size.

B List<T> can dynamically resize and has helpful methods.

C List<T> uses less memory than arrays.

D List<T> cannot store objects.

List can grow or shrink dynamically and provides methods like Add, Remove, and Contains.

When might arrays be preferred over collections?

A When data size changes frequently.

B When you need dynamic resizing.

C When you want to use Add and Remove methods.

D When performance and fixed size are important.

Arrays can be more efficient when the size is fixed and known, improving performance.

Which collection method is NOT available in arrays?

A Indexing

B Length

C Add

D Iteration

Arrays do not have an Add method; their size is fixed.

Why do collections improve code readability?

A They have clear method names for common actions.

B They do not support iteration.

C They require manual size management.

D They use complex syntax.

Collections provide methods like Add, Remove, and Contains, making code easier to read and maintain.

Explain why collections are often preferred over arrays in C# programming.

Think about how easy it is to change the number of items.

Describe a scenario where using an array might be better than a collection.

Consider when data size does not change.