Data Structures MCQs with Answers
Practice important Data Structures MCQs with answers and explanations.
Multiple Choice Questions
Q71: How does the back method in a singly-linked list work?
- A: Moves currentNode one step forward
- B: Moves currentNode to headNode
- C: Traverses the list from the start to find the previous node
- D: Deletes the last node
View Answer
C
Q72: What additional pointer is used in a doubly-linked list that is not present in a singly-linked list?
- A: currentNode
- B: lastCurrentNode
- C: prevNode
- D: nextNode
View Answer
C
Q73: In a doubly-linked list, what does the getPrev() method do?
- A: Sets the previous node
- B: Returns the previous node's address
- C: Sets the next node
- D: Returns the next node's address
View Answer
B
Q74: What does the circularly-linked list avoid by linking the last node to the first node?
- A: NULL pointers
- B: Memory allocation
- C: Node deletion
- D: Backward traversal errors
View Answer
A
Q75: In a circularly-linked list, where does the next pointer of the last node point?
- A: To the first node
- B: To NULL
- C: To the previous node
- D: To the head node
View Answer
A
Q76: What kind of data structure is a circularly-linked list?
- A: Non-linear
- B: Linear
- C: Tree
- D: Graph
View Answer
B
Q77: Which method is typically used to move the currentNode to the start of the list?
- A: back()
- B: length()
- C: start()
- D: remove()
View Answer
C
Q78: What is the benefit of a doubly-linked list over a singly-linked list?
- A: Easier backward traversal
- B: More memory efficient
- C: Simplified addition operation
- D: Easier node removal
View Answer
A
Q79: How many pointers are there in a node of a doubly-linked list?
- A: 1
- B: 2
- C: 3
- D: 4
View Answer
C
Q80: Which operation in a linked list may require traversing the entire list?
- A: Add
- B: Remove
- C: Find
- D: Start
View Answer
C