Collections C#

What is the main motivation for using collection classes in C#?

• To reduce the size of arrays

• To provide flexible, dynamically resizing data structures

• To avoid using objects

• To enhance memory usage

Which namespace contains nongeneric collections in C#?

• System.Generic

• System.Collections.Generic

• System.Collections

• System.Data

What is the key disadvantage of nongeneric collections?

• They are type-safe

• They perform better than generic collections

• They operate on `System.Object` types, leading to type safety issues

• They require complex syntax

Which of the following is an example of a generic collection?

• ArrayList

• Queue

• List

• Stack

Why are generic collections preferred over nongeneric collections?

• They provide better type safety and performance by avoiding boxing and unboxing

• They allow any data type to be used without casting

• They only work with primitive data types

• They can store only objects

What does the `ArrayList` collection in C# represent?

• A generic collection for fixed-size arrays

• A nongeneric collection that can hold different data types

• A stack-based collection

• A queue-based collection

Which of the following is NOT a generic collection class in C#?

• List

• Dictionary

• ArrayList

• Stack

What is the main purpose of the `List` class in C#?

• To store fixed-size data

• To provide a dynamically resizable collection of elements with type safety

• To represent a first-in, first-out (FIFO) collection

• To store key-value pairs

Which method is used to add an item to a `List`?

• AddItem()

• Insert()

• Add()

• Enqueue()

What is the primary difference between `Stack` and `Queue`?

• `Stack` is first-in, first-out (FIFO), while `Queue` is last-in, first-out (LIFO)

• `Stack` is last-in, first-out (LIFO), while `Queue` is first-in, first-out (FIFO)

• `Stack` stores only objects, while `Queue` stores primitives

• `Queue` is always sorted, but `Stack` is not