Data Structures MCQs with Answers
Practice important Data Structures MCQs with answers and explanations.
Multiple Choice Questions
Q471: How do you maintain heap property when inserting a new value into a heap?
- A: By moving the new value to the root
- B: By replacing the new value with the minimum value
- C: By adjusting the tree to restore heap property
- D: By removing the smallest value from the heap
View Answer
C
Q472: What is a max heap?
- A: A heap where the root node has the smallest value
- B: A heap where the root node has the largest value
- C: A heap with unordered nodes
- D: A heap where all nodes are equal
View Answer
B
Q473: How is a node inserted into a heap?
- A: At the root node
- B: At the end of the heap and then adjusted
- C: At any random position
- D: Directly into the middle of the heap
View Answer
B
Q474: What is the formula used to find the parent node's index in an array representation of a heap?
- A: i / 2
- B: 2i + 1
- C: (i - 1) / 2
- D: 2i
View Answer
A
Q475: What does a complete binary tree ensure when using an array for storage?
- A: Efficient use of memory
- B: Fast sorting of elements
- C: Quick access to parent nodes
- D: Contiguous allocation of nodes
View Answer
A
Q476: How are pointers used in dynamic memory allocation compared to arrays in the context of data structures?
- A: Pointers provide faster access
- B: Pointers reduce memory wastage
- C: Arrays are more efficient
- D: Pointers manage memory efficiently and dynamically
View Answer
D
Q477: What operation is used to adjust the position of nodes after inserting a new value in a heap?
- A: Deletion operation
- B: Heapify operation
- C: Sorting operation
- D: Traversal operation
View Answer
B
Q478: In a min-heap, if a new node has a value less than its parent, what is the result?
- A: The new node remains in place
- B: The new node becomes the root
- C: The new node is removed
- D: The new node is swapped with its parent and potentially other nodes
View Answer
B
Q479: Which data structure is often used to implement a priority queue?
- A: Stack
- B: Queue
- C: Heap
- D: Linked List
View Answer
C
Q480: How are elements rearranged in a heap after the insertion of a new value?
- A: By merging elements
- B: By swapping elements to restore heap property
- C: By sorting the entire heap
- D: By reversing the order of elements
View Answer
B