MCQ Collection
Data Structures 300 Unique MCQs
Practice Data Structures 300 Unique questions with answers and explanations.
Choose an option to check your answer.
A.
Binary Tree
B.
Radix Sort
C.
Deque
D.
Complete Binary Tree
Show Answer
Correct Answer: D. Complete Binary Tree
Explanation:
Complete Binary Tree fits because it supports array-based heap representation and nodes on the last level are as far left as possible.
Choose an option to check your answer.
A.
multi-key sorting
B.
reasoning about strictly binary branching structures
C.
priority queues requiring efficient meld operations
D.
database range queries
Show Answer
Correct Answer: B. reasoning about strictly binary branching structures
Explanation:
Full Binary Tree is commonly used for reasoning about strictly binary branching structures.
Choose an option to check your answer.
A.
it does not naturally support frequent updates
B.
edges typically represent characters or symbols
C.
no node has exactly one child
D.
it bounds a function from below for sufficiently large inputs
Show Answer
Correct Answer: C. no node has exactly one child
Explanation:
The defining property is that no node has exactly one child.
Choose an option to check your answer.
A.
Binary Tree
B.
Big-Theta Notation
C.
Directed Graph
D.
Path Compression
Show Answer
Correct Answer: A. Binary Tree
Explanation:
Binary Tree is a tree in which each node has at most two children.
Choose an option to check your answer.
A.
ordered searching and dynamic set operations
B.
representing hierarchical binary relationships
C.
dense graphs and constant-time edge-existence tests
D.
teaching basic sorting mechanics
Show Answer
Correct Answer: B. representing hierarchical binary relationships
Explanation:
Binary Tree is commonly used for representing hierarchical binary relationships.
Choose an option to check your answer.
A.
edges typically represent characters or symbols
B.
its merge step usually needs auxiliary storage for arrays
C.
children are commonly called left and right
D.
elements are typically stored in adjacent memory locations
Show Answer
Correct Answer: C. children are commonly called left and right
Explanation:
The defining property is that children are commonly called left and right.
Choose an option to check your answer.
A.
Graph
B.
Stable Sorting
C.
Heap
D.
Binary Tree
Show Answer
Correct Answer: D. Binary Tree
Explanation:
Binary Tree fits because it supports representing hierarchical binary relationships and children are commonly called left and right.
Choose an option to check your answer.
A.
Full Binary Tree
B.
Stable Sorting
C.
Balanced Binary Tree
D.
Adjacency List
Show Answer
Correct Answer: A. Full Binary Tree
Explanation:
Full Binary Tree is a binary tree where every node has either zero or two children.
Choose an option to check your answer.
A.
substring search and text indexing
B.
sliding-window algorithms
C.
prefix sums with updates
D.
hash tables with flexible load factors
Show Answer
Correct Answer: B. sliding-window algorithms
Explanation:
Deque is commonly used for sliding-window algorithms.
Choose an option to check your answer.
A.
recently accessed elements become quicker to access again
B.
it avoids allocating an auxiliary structure proportional to input size
C.
both front and rear operations can be efficient
D.
performance depends on how evenly items spread across buckets
Show Answer
Correct Answer: C. both front and rear operations can be efficient
Explanation:
The defining property is that both front and rear operations can be efficient.
Choose an option to check your answer.
A.
Complete Binary Tree
B.
Queue
C.
Binary Search Tree
D.
Deque
Show Answer
Correct Answer: D. Deque
Explanation:
Deque fits because it supports sliding-window algorithms and both front and rear operations can be efficient.
Choose an option to check your answer.
A.
Priority Queue
B.
B+ Tree
C.
Trie
D.
Linear Search
Show Answer
Correct Answer: A. Priority Queue
Explanation:
Priority Queue is a structure that removes elements according to priority rather than arrival time.
