LinkedList usage in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new LinkedList of integers.

C Sharp (C#)

LinkedList<int> numbers = new LinkedList<int>[1];

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

A()

B[]

C{}

D<>

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets instead of parentheses.

Using curly braces which are for collection initializers.

Using angle brackets which are for generics.

The correct syntax to create a new LinkedList is to use parentheses () after the type.

2fill in blank

medium

Complete the code to add the value 10 at the end of the LinkedList.

C Sharp (C#)

numbers.[1](10);

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AAddLast

BAddAfter

CAddFirst

DAddBefore

Attempts:

3 left

💡 Hint

Common Mistakes

Using AddFirst which adds at the start.

Using AddAfter or AddBefore without a reference node.

Use AddLast to add a new element at the end of the LinkedList.

3fill in blank

hard

Fix the error in the code to remove the first element from the LinkedList.

C Sharp (C#)

numbers.[1]();

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

ADeleteFirst

BRemoveLast

CRemoveAt

DRemoveFirst

Attempts:

3 left

💡 Hint

Common Mistakes

Using RemoveLast which removes the last element.

Using RemoveAt which does not exist for LinkedList.

Using DeleteFirst which is not a valid method.

The method RemoveFirst() removes the first element from the LinkedList.

4fill in blank

hard

Fill both blanks to check if the LinkedList contains the value 5 and then add it if not present.

C Sharp (C#)

if (!numbers.[1](5)) {
    numbers.[2](5);
}

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

AContains

BAddLast

CAddFirst

DRemove

Attempts:

3 left

💡 Hint

Common Mistakes

Using Remove instead of Contains for checking.

Adding with AddFirst instead of AddLast.

Use Contains to check if the value exists, and AddLast to add it at the end if not.

5fill in blank

hard

Fill all three blanks to create a LinkedList of strings, add "hello" at the start, and then remove "world".

C Sharp (C#)

LinkedList<string> words = new LinkedList<string>[1];
words.[2]("hello");
words.[3]("world");

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

A()

BAddFirst

CRemove

DAddLast

Attempts:

3 left

💡 Hint

Common Mistakes

Using AddLast instead of AddFirst for adding "hello".

Using RemoveFirst or RemoveLast instead of Remove with a value.

Create the LinkedList with (), add "hello" at the start with AddFirst, and remove "world" with Remove.