Array Insertion at End in DSA Python - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to insert an element at the end of the array.

DSA Python

arr = [1, 2, 3]
arr.[1](4)
print(arr)

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

Aappend

Binsert

Cextend

Dpop

Attempts:

3 left

💡 Hint

Common Mistakes

Using insert without index causes error.

Using pop removes elements instead of adding.

The append method adds an element at the end of the list.

2fill in blank

medium

Complete the code to add multiple elements at the end of the array.

DSA Python

arr = [1, 2, 3]
arr.[1]([4, 5])
print(arr)

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

Aappend

Binsert

Cextend

Dremove

Attempts:

3 left

💡 Hint

Common Mistakes

Using append adds the list as a single element.

Using remove deletes elements instead of adding.

The extend method adds all elements from another list to the end.

3fill in blank

hard

Fix the error in the code to insert 10 at the end of the array.

DSA Python

arr = [5, 6, 7]
arr.[1](10, 3)
print(arr)

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

Apop

Binsert

Cextend

Dappend

Attempts:

3 left

💡 Hint

Common Mistakes

Using insert with wrong arguments causes error.

Using pop removes elements instead of adding.

append takes only one argument and adds it at the end. insert needs index and value, but here we want to add at the end simply.

4fill in blank

hard

Fill both blanks to insert 20 at the end of the array using insert method.

DSA Python

arr = [10, 15, 18]
arr.[1]([2], 20)
print(arr)

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

Ainsert

Bappend

Clen(arr)

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using index 0 inserts at the start, not the end.

Using append with two arguments causes error.

Using insert with index equal to the length of the array adds the element at the end.

5fill in blank

hard

Fill all three blanks to create a new array by adding 30 at the end using concatenation.

DSA Python

arr = [25, 27]
new_arr = arr [1] [[2]] [3]
print(new_arr)

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

A+

B30

C*

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using * repeats the list instead of adding an element.

Using - between lists causes error.

Using + concatenates lists. We add a list with one element 30. The - at the end is just to complete the code line (no operation here, but needed to fill blank).