Memory Layout Comparison Array vs Linked List in DSA C - Interactive Comparison Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an array of 5 integers.

DSA C

int numbers[[1]];

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A5

B10

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 or 1 as size will not allocate enough space.

The array size must be 5 to hold 5 integers.

2fill in blank

medium

Complete the code to define a node struct for a singly linked list.

DSA C

struct Node {
    int data;
    struct Node* [1];
};

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Apointer

Bprev

Cnext

Dlink

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'prev' is for doubly linked lists, not singly linked lists.

The pointer to the next node in a singly linked list is commonly named 'next'.

3fill in blank

hard

Fix the error in the code to allocate memory for a new linked list node.

DSA C

struct Node* newNode = (struct Node*) malloc(sizeof([1]));

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ANode

Bstruct Node

Cnode

Dstruct node

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting 'struct' causes a compilation error in C.

In C, when using sizeof for a struct, you must use the full type name including 'struct'.

4fill in blank

hard

Fill both blanks to correctly access the third element in an array and the third node's data in a linked list.

DSA C

int thirdArrayValue = arr[[1]];
int thirdNodeValue = thirdNode->[2];

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A2

B3

Cdata

Dnext

Attempts:

3 left

💡 Hint

Common Mistakes

Using index 3 for the third element causes out-of-bounds error.

Array indices start at 0, so the third element is at index 2. The data in a node is accessed via 'data'.

5fill in blank

hard

Fill all three blanks to create a linked list node, assign data, and link to next node.

DSA C

struct Node* node1 = (struct Node*) malloc(sizeof([1]));
node1->[2] = 10;
node1->[3] = NULL;

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Astruct Node

Bdata

Cnext

DNode

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Node' without 'struct' in sizeof causes errors.

Confusing 'data' and 'next' fields.

Memory is allocated for 'struct Node'. The data field is assigned 10. The next pointer is set to NULL to mark the end.