List methods (Add, Remove, Find, Sort) in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add an item to the list.

C Sharp (C#)

List<string> fruits = new List<string>();
fruits.[1]("Apple");

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

ARemove

BAdd

CFind

DSort

Attempts:

3 left

💡 Hint

Common Mistakes

Using Remove instead of Add will try to delete an item.

Using Find or Sort will not add items.

The Add method adds an item to the end of the list.

2fill in blank

medium

Complete the code to remove an item from the list.

C Sharp (C#)

List<int> numbers = new List<int> {1, 2, 3};
numbers.[1](2);

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

ARemove

BFind

CAdd

DSort

Attempts:

3 left

💡 Hint

Common Mistakes

Using Add will add an item instead of removing.

Using Find or Sort will not remove items.

The Remove method deletes the first occurrence of the specified item from the list.

3fill in blank

hard

Fix the error in the code to find an item in the list.

C Sharp (C#)

List<string> names = new List<string> {"Anna", "Bob", "Cara"};
string found = names.[1](name => name == "Bob");

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

AFind

BRemove

CAdd

DSort

Attempts:

3 left

💡 Hint

Common Mistakes

Using Add or Remove will not find items.

Using Sort will reorder the list, not find an item.

The Find method searches for an item that matches the condition given by a lambda expression.

4fill in blank

hard

Fill both blanks to sort the list in ascending order and then remove the first item.

C Sharp (C#)

List<int> values = new List<int> {5, 3, 8};
values.[1]();
values.[2](values[0]);

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

ASort

BAdd

CRemove

DFind

Attempts:

3 left

💡 Hint

Common Mistakes

Using Add instead of Remove will add an item instead of deleting.

Using Find instead of Sort will not order the list.

First, Sort() arranges the list in ascending order. Then, Remove() deletes the first item.

5fill in blank

hard

Fill all three blanks to add a new item, find it, and then remove it from the list.

C Sharp (C#)

List<string> pets = new List<string> {"Cat", "Dog"};
pets.[1]("Bird");
string foundPet = pets.[2](p => p == "Bird");
pets.[3](foundPet);

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

AAdd

BFind

CRemove

DSort

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of methods.

Using Sort instead of Find or Remove.

We add "Bird" with Add, find it with Find, then remove it with Remove.