Array Insertion at Beginning in DSA Python - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to insert an element at the beginning of the list.

DSA Python

arr = [2, 3, 4]
arr.[1](0, 1)
print(arr)

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

Ainsert

Bextend

Cpop

Dappend

Attempts:

3 left

💡 Hint

Common Mistakes

Using append adds at the end, not the beginning.

Using pop removes elements instead of adding.

The insert method adds an element at a specific index. Here, index 0 means the beginning.

2fill in blank

medium

Complete the code to insert the value 10 at the start of the list named numbers.

DSA Python

numbers = [20, 30, 40]
numbers.[1](0, 10)
print(numbers)

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

Apop

Bappend

Cremove

Dinsert

Attempts:

3 left

💡 Hint

Common Mistakes

Using append adds at the end.

Using remove or pop deletes elements.

To add 10 at the start, use insert(0, 10) on the list.

3fill in blank

hard

Fix the error in the code to correctly insert 5 at the beginning of the list.

DSA Python

data = [6, 7, 8]
data.[1](0, 5)
print(data)

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

Aappend

Binsert

Cextend

Dpop

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the order of arguments causes wrong insertion.

Using append adds at the end.

The insert method requires the index first, then the value. So it should be insert(0, 5).

4fill in blank

hard

Fill both blanks to insert 100 at the start and then print the list.

DSA Python

lst = [200, 300]
lst.[1]([2], 100)
print(lst)

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

Ainsert

Bappend

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using append instead of insert.

Using wrong index like 1 instead of 0.

Use insert with index 0 to add at the beginning.

5fill in blank

hard

Fill all three blanks to insert 0 at the beginning, then insert 5 at index 1, and finally print the list.

DSA Python

arr = [10, 15]
arr.[1]([2], 0)
arr.[3](1, 5)
print(arr)

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

Ainsert

Bappend

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using append instead of insert.

Mixing up indices.

Use insert(0, 0) to add 0 at start, then insert(1, 5) to add 5 at index 1.