Data Structures MCQs with Answers
Practice important Data Structures MCQs with answers and explanations.
Multiple Choice Questions
Q521: What is the correct approach to proving that the buildHeap algorithm runs in linear time?
- A: By comparing it to N log N complexity and showing it is more efficient
- B: By showing that it takes constant time
- C: By proving the algorithm takes quadratic time
- D: By demonstrating that it involves exponential growth
View Answer
A
Q522: How does the theorem related to the sum of node heights in a perfect binary tree relate to heap construction time?
- A: It shows that the buildHeap algorithm is less efficient than N log N
- B: It demonstrates that the buildHeap algorithm runs in linear time
- C: It proves that the height of nodes is irrelevant
- D: It indicates that heap construction is exponential
View Answer
B
Q523: What does the getSize method return in the heap class?
- A: The maximum capacity of the heap
- B: The number of elements currently in the heap
- C: The minimum element in the heap
- D: The height of the heap
View Answer
B
Q524: What is the purpose of the isFull method in the heap class?
- A: To check if the heap is empty
- B: To determine if the heap has reached its capacity
- C: To check if the heap is currently building
- D: To determine if there is space to insert new elements
View Answer
B
Q525: What is the primary advantage of using buildHeap over insert in heap operations?
- A: buildHeap is faster than insert
- B: buildHeap requires less memory
- C: buildHeap is simpler to implement
- D: buildHeap is more flexible
View Answer
A
Q526: In the PriorityQueue class, what is the maximum size defined by PQMAX?
- A: 10
- B: 20
- C: 30
- D: 40
View Answer
C
Q527: What does the remove method of the PriorityQueue class do if the heap is empty?
- A: It returns an Event object
- B: It throws an error
- C: It prints a message and returns NULL
- D: It inserts a new Event
View Answer
C
Q528: Which method in the PriorityQueue class checks if the heap is full?
- A: full()
- B: length()
- C: insert()
- D: isEmpty()
View Answer
A
Q529: How does the insert method in the PriorityQueue class signal a successful operation?
- A: By returning 0
- B: By printing a message
- C: By returning 1
- D: By throwing an exception
View Answer
C
Q530: What is the result of calling deleteMin() from a min-heap?
- A: The maximum element is removed
- B: The minimum element is removed
- C: The heap is cleared
- D: The last element is removed
View Answer
B