Array Deletion at Middle Index in DSA Python - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to remove the middle element from the list.

DSA Python

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

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

Ainsert

Bremove

Cappend

Dpop

Attempts:

3 left

💡 Hint

Common Mistakes

Using remove() which removes by value, not index.

Using append() or insert() which add elements instead of removing.

The pop method removes an element at a specific index. Here, mid is the middle index.

2fill in blank

medium

Complete the code to find the middle index of the list correctly.

DSA Python

arr = [10, 20, 30, 40, 50, 60]
mid = [1]
print(mid)

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

Alen(arr) / 2

Blen(arr) // 2

Clen(arr) - 1

Dlen(arr) + 1

Attempts:

3 left

💡 Hint

Common Mistakes

Using / which returns a float, causing errors when used as index.

Using len(arr) - 1 which gives last index, not middle.

Using integer division // gives the middle index as an integer.

3fill in blank

hard

Fix the error in the code to delete the middle element from the list.

DSA Python

arr = [7, 8, 9, 10, 11]
mid = len(arr) // 2
arr.[1](mid)
print(arr)

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

Ainsert

Bremove

Cpop

Dappend

Attempts:

3 left

💡 Hint

Common Mistakes

Using remove() with an index value instead of the element value.

Using append() or insert() which add elements instead of removing.

The code incorrectly uses remove with an index value. pop should be used with index to remove by position.

4fill in blank

hard

Fill both blanks to create a new list without the middle element.

DSA Python

arr = [2, 4, 6, 8, 10]
mid = len(arr) // 2
new_arr = [arr[[1]] for [2] in range(len(arr)) if [2] != mid]
print(new_arr)

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

Ai

Bj

Cx

Dy

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names causing NameError.

Using the middle index inside the list comprehension causing wrong output.

Use the same variable i for indexing and iteration to skip the middle index.

5fill in blank

hard

Fill all three blanks to delete the middle element and print the updated list.

DSA Python

arr = [3, 5, 7, 9, 11, 13]
mid = len(arr) // 2
arr.[1](mid)
print(arr[[2]:[3]])

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

Apop

B0

Cmid

Dremove

Attempts:

3 left

💡 Hint

Common Mistakes

Using remove() instead of pop() causing errors.

Incorrect slice indices causing wrong output.

Use pop to remove the middle element by index. Then print the list slice from start to middle index.