Array Insertion at End in DSA C - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to insert a new element at the end of the array.

DSA C

arr[size] = [1];
size++;

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

Aarr[size]

Bsize

Cnew_element

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using size as the value instead of the new element.

Assigning to arr[size-1] which overwrites the last element.

We assign the new element to the position at the current size index, then increase size.

2fill in blank

medium

Complete the code to check if the array has space before insertion.

DSA C

if (size < [1]) {
    arr[size] = new_element;
    size++;
}

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

Anew_element

Bmax_size

Carr

Dsize

Attempts:

3 left

💡 Hint

Common Mistakes

Comparing size with arr instead of max_size.

Using new_element in the condition.

We compare size with max_size to ensure there is space to insert.

3fill in blank

hard

Fix the error in the insertion code to avoid overwriting elements.

DSA C

arr[[1]] = new_element;
size++;

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

Asize

Bsize - 1

C0

Dmax_size

Attempts:

3 left

💡 Hint

Common Mistakes

Using size - 1 which overwrites the last element.

Using max_size which is out of bounds.

Inserting at index size appends the element; size - 1 overwrites last element.

4fill in blank

hard

Fill both blanks to insert an element only if there is space.

DSA C

if ([1] < [2]) {
    arr[size] = new_element;
    size++;
}

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

Asize

Bmax_size

Cnew_element

Darr

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping size and max_size in the condition.

Using new_element or arr in the condition.

We check if size is less than max_size before inserting.

5fill in blank

hard

Fill all three blanks to insert and print the updated array size.

DSA C

if ([1] < [2]) {
    arr[[3]] = new_element;
    size++;
    printf("Size: %d\n", size);
}

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

Asize

Bmax_size

Dnew_element

Attempts:

3 left

💡 Hint

Common Mistakes

Using new_element as index.

Printing size before incrementing.

Check size < max_size, insert at arr[size], then increment size.