What does Doubly linked list refer to?
Difficulty: Medium
About this MCQ
This Medium Data Structures question asks: What does Doubly linked list refer to? The correct choice is B. A linked list where each node has pointers to both the next and previous nodes.. Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.
Data Structures items like this one are written for Pakistan exams such as CSS, FPSC, PPSC, and NTS. The difficulty label is a hint about how much of the topic the stem assumes, not a score. Tags and exam names, when they are present, tell you where else the same idea is tested. Previous and next links stay in Data Structures so you can continue the subject. Related questions point at nearby stems if you want another angle on the same idea.
Treat the explanation as part of the question, not a footnote. If you missed it, reread the stem against the correct option before you open the next Data Structures item. A timed quiz is the same pool with a clock and a score. A past paper is a full sitting rather than this single question.
- A. A data structure that maps keys to values using a hash function for fast lookup.
Why not A: “A data structure that maps keys to values using a hash function for fast lookup.” does not fit this question. The answer is A linked list where each node has pointers to both the next and previous nodes..
- B. A linked list where each node has pointers to both the next and previous nodes. ✓
- C. A self-balancing binary search tree where the height difference between subtrees is at most one.
Why not C: “A self-balancing binary search tree where the height difference between subtrees is at most one.” does not fit this question. The answer is A linked list where each node has pointers to both the next and previous nodes..
- D. A data structure consisting of nodes (vertices) connected by edges, used to represent relationships.
Why not D: “A data structure consisting of nodes (vertices) connected by edges, used to represent relationships.” does not fit this question. The answer is A linked list where each node has pointers to both the next and previous nodes..
Correct answer
B. A linked list where each node has pointers to both the next and previous nodes.
Explanation
A linked list where each node has pointers to both the next and previous nodes option B is the accepted answer to What does Doubly linked list refer to Option A A data structure that maps keys to values using a hash function for fast lookup does not fit this question Option C A self-balancing binary search tree where the height difference between subtrees is at most one does not fit this question Option D A data structure consisting of nodes vertices connected by edges used to represent relationships does not fit this question For this Data Structures question the accepted answer is A linked list where each node has.
Source: Data Structures Official Reference Guide
Tags: computer science, data structures, algorithms, programming
Submitted by: MCQsHub Editorial
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