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.
Linear Search
B.
Memory Pool
C.
Radix Sort
D.
B+ Tree
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Correct Answer: D. B+ Tree
Explanation:
B+ Tree fits because it supports database range queries and leaf nodes are commonly linked for sequential access.
Choose an option to check your answer.
A.
Trie
B.
B-Tree
C.
Max-Heap
D.
Adjacency Matrix
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Correct Answer: A. Trie
Explanation:
Trie is a tree that stores keys by sharing common prefixes.
Choose an option to check your answer.
A.
fast average-case dictionary operations
B.
prefix search and autocomplete
C.
fixed-size buffering
D.
expressing a guaranteed minimum growth rate
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Correct Answer: B. prefix search and autocomplete
Explanation:
Trie is commonly used for prefix search and autocomplete.
Choose an option to check your answer.
A.
the rear index can wrap to the beginning of the array
B.
it typically uses recursion or a stack
C.
edges typically represent characters or symbols
D.
insertion occurs at the rear and removal at the front
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Correct Answer: C. edges typically represent characters or symbols
Explanation:
The defining property is that edges typically represent characters or symbols.
Choose an option to check your answer.
A.
Radix Sort
B.
Counting Sort
C.
Hash Table
D.
B-Tree
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Correct Answer: D. B-Tree
Explanation:
B-Tree fits because it supports database and file-system indexes and a node can store multiple keys and have multiple children.
Choose an option to check your answer.
A.
B-Tree
B.
Recursion Stack
C.
Complete Binary Tree
D.
Queue
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Correct Answer: A. B-Tree
Explanation:
B-Tree is a balanced multiway search tree designed for block storage.
Choose an option to check your answer.
A.
expressing a guaranteed minimum growth rate
B.
database and file-system indexes
C.
maintaining an indexed sequence whose size changes
D.
reasoning about strictly binary branching structures
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Correct Answer: B. database and file-system indexes
Explanation:
B-Tree is commonly used for database and file-system indexes.
Choose an option to check your answer.
A.
it can suffer from primary clustering
B.
an edge may represent a string rather than one character
C.
a node can store multiple keys and have multiple children
D.
it can support pattern search in time proportional to the pattern length
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Correct Answer: C. a node can store multiple keys and have multiple children
Explanation:
The defining property is that a node can store multiple keys and have multiple children.
Choose an option to check your answer.
A.
Red-Black Tree
B.
Complete Binary Tree
C.
Bubble Sort
D.
Segment Tree
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Correct Answer: A. Red-Black Tree
Explanation:
Red-Black Tree is a self-balancing binary search tree that uses node colors and structural rules.
Choose an option to check your answer.
A.
small or unsorted collections
B.
implementing ordered maps and sets
C.
fast pattern matching
D.
fast general-purpose in-memory sorting
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Correct Answer: B. implementing ordered maps and sets
Explanation:
Red-Black Tree is commonly used for implementing ordered maps and sets.
Choose an option to check your answer.
A.
insertion occurs at the rear and removal at the front
B.
nodes on the last level are as far left as possible
C.
its rules guarantee logarithmic height without strict AVL-style balance
D.
the rear index can wrap to the beginning of the array
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Correct Answer: C. its rules guarantee logarithmic height without strict AVL-style balance
Explanation:
The defining property is that its rules guarantee logarithmic height without strict AVL-style balance.
Choose an option to check your answer.
A.
Suffix Array
B.
Path Compression
C.
Perfect Binary Tree
D.
Red-Black Tree
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Correct Answer: D. Red-Black Tree
Explanation:
Red-Black Tree fits because it supports implementing ordered maps and sets and its rules guarantee logarithmic height without strict AVL-style balance.
