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.
Max-Heap
B.
Stable Sorting
C.
Graph
D.
AVL Tree
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Correct Answer: A. Max-Heap
Explanation:
Max-Heap is a heap in which every parent key is no less than its children's keys.
This description distinguishes it from the other choices.
Choose an option to check your answer.
A.
Counting Sort
B.
Stable Sorting
C.
Big-O Notation
D.
Trie
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Correct Answer: D. Trie
Explanation:
Trie fits because it supports prefix search and autocomplete and edges typically represent characters or symbols.
Both clues point to this choice.
Choose an option to check your answer.
A.
Radix Tree
B.
B+ Tree
C.
Circular Queue
D.
In-Place Algorithm
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Correct Answer: A. Radix Tree
Explanation:
Radix Tree is a compressed trie that merges chains of single-child nodes.
This description distinguishes it from the other choices.
Choose an option to check your answer.
A.
representing hierarchical binary relationships
B.
memory-efficient prefix indexing
C.
repeatedly retrieving the smallest element
D.
sliding-window algorithms
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Correct Answer: B. memory-efficient prefix indexing
Explanation:
Radix Tree is commonly used for memory-efficient prefix indexing.
Its design supports this task efficiently or naturally.
Choose an option to check your answer.
A.
both front and rear operations can be efficient
B.
it can suffer from primary clustering
C.
an edge may represent a string rather than one character
D.
suffixes are ordered lexicographically
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Correct Answer: C. an edge may represent a string rather than one character
Explanation:
The defining property is that an edge may represent a string rather than one character.
The other statements describe different structures or concepts.
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A.
Binary Search Tree
B.
Garbage Collection
C.
Quadratic Probing
D.
Radix Tree
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Correct Answer: D. Radix Tree
Explanation:
Radix Tree fits because it supports memory-efficient prefix indexing and an edge may represent a string rather than one character.
Both clues point to this choice.
Choose an option to check your answer.
A.
Heap
B.
Stack
C.
Binary Tree
D.
Binary Search
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Correct Answer: A. Heap
Explanation:
Heap is a complete tree-based structure satisfying a heap-order property.
This description distinguishes it from the other choices.
Choose an option to check your answer.
A.
memory management in managed runtimes
B.
priority queue implementation
C.
explaining occasional expensive dynamic-array operations
D.
cycle detection, topological reasoning, and connectivity
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Correct Answer: B. priority queue implementation
Explanation:
Heap is commonly used for priority queue implementation.
Its design supports this task efficiently or naturally.
Choose an option to check your answer.
A.
edges may be directed or undirected
B.
it provides excellent amortized decrease-key performance
C.
only the root is guaranteed to contain the global minimum or maximum
D.
it typically uses recursion or a stack
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Correct Answer: C. only the root is guaranteed to contain the global minimum or maximum
Explanation:
The defining property is that only the root is guaranteed to contain the global minimum or maximum.
The other statements describe different structures or concepts.
Choose an option to check your answer.
A.
B+ Tree
B.
Suffix Array
C.
Circular Queue
D.
Radix Tree
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Correct Answer: A. B+ Tree
Explanation:
B+ Tree is a balanced multiway index tree that stores records or record pointers at leaf level.
This description distinguishes it from the other choices.
Choose an option to check your answer.
A.
ordered dictionary operations with expected logarithmic time
B.
database range queries
C.
fast random access when the index is known
D.
quickly rejecting items that are definitely absent
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Correct Answer: B. database range queries
Explanation:
B+ Tree is commonly used for database range queries.
Its design supports this task efficiently or naturally.
Choose an option to check your answer.
A.
edges may be directed or undirected
B.
its merge step usually needs auxiliary storage for arrays
C.
leaf nodes are commonly linked for sequential access
D.
path quality can depend on the sum of weights
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Correct Answer: C. leaf nodes are commonly linked for sequential access
Explanation:
The defining property is that leaf nodes are commonly linked for sequential access.
The other statements describe different structures or concepts.