Queue and Stack behavior in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add an item to the queue.

C Sharp (C#)

Queue<int> numbers = new Queue<int>();
numbers.[1](5);

Drag options to blanks, or click blank then click option'

APush

BInsert

CAdd

DEnqueue

Attempts:

3 left

💡 Hint

Common Mistakes

Using Push instead of Enqueue for queues.

Trying to use Add or Insert which are not queue methods.

Use Enqueue to add an item to a queue in C#.

2fill in blank

medium

Complete the code to remove an item from the stack.

C Sharp (C#)

Stack<string> words = new Stack<string>();
words.Push("hello");
string top = words.[1]();

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APop

BDequeue

CRemove

DPeek

Attempts:

3 left

💡 Hint

Common Mistakes

Using Dequeue which is for queues.

Using Peek which does not remove the item.

Use Pop to remove and return the top item from a stack.

3fill in blank

hard

Fix the error in the code to get the next item from the queue without removing it.

C Sharp (C#)

Queue<char> letters = new Queue<char>();
letters.Enqueue('a');
char next = letters.[1]();

Drag options to blanks, or click blank then click option'

APop

BDequeue

CPeek

DTop

Attempts:

3 left

💡 Hint

Common Mistakes

Using Pop which is not a queue method.

Using Dequeue which removes the item.

Use Peek to look at the next item in the queue without removing it.

4fill in blank

hard

Fill both blanks to create a stack and add an item to it.

C Sharp (C#)

Stack<int> [1] = new [2]<int>();
[1].Push(10);

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Anumbers

BQueue

CStack

Ditems

Attempts:

3 left

💡 Hint

Common Mistakes

Using Queue instead of Stack for the type.

Using inconsistent variable names.

Declare a stack variable named items and create a new Stack<int> instance.

5fill in blank

hard

Fill all three blanks to create a queue, add an item, and remove it.

C Sharp (C#)

Queue<string> [1] = new Queue<string>();
[1].[2]("apple");
string fruit = [1].[3]();

Drag options to blanks, or click blank then click option'

Afruits

BEnqueue

CDequeue

Ditems

Attempts:

3 left

💡 Hint

Common Mistakes

Using Push or Pop which are stack methods.

Mixing variable names inconsistently.

Create a queue named fruits, add "apple" with Enqueue, then remove it with Dequeue.