Trees In Data Structures — Part 2 MCQs with Explanations
Practice high-yield Computer Science & IT MCQs on Trees In Data Structures — Part 2 with worked academic solutions for PPSC, FPSC, CSS, PMS, NTS.
Questions
40
Difficulty Level
Exam-Level
Target Exams
PPSC, FPSC, CSS...
Estimated Time
48 mins
Exam-Level PPSC FPSC CSS PMS NTS
Verified for Commission Syllabus • Oct 14, 2026
40
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Question 1 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What type of tree is used in databases for indexing?
Correct Answer: Option A — B-Tree
Detailed Academic Explanation:
B-Tree is the correct answer to “What type of tree is used in databases for indexing”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 2 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the primary use of a Trie data structure?
Correct Answer: Option A — Efficiently storing and retrieving strings, especially for prefix searches.
Detailed Academic Explanation:
Efficiently storing and retrieving strings, especially for prefix searches. is the correct answer to “What is the primary use of a Trie data structure”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 3 of 40
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★ FPSC
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In a B-Tree, what is the minimum number of keys in a non-root node?
Correct Answer: Option A — ⌈t/2⌉ - 1 where t is the minimum degree
Detailed Academic Explanation:
⌈t/2⌉ - 1 where t is the minimum degree is the correct answer to “In a B-Tree, what is the minimum number of keys in a non-root node”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 4 of 40
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What is the primary benefit of using a B+ Tree over a B-Tree?
Correct Answer: Option A — B+ Trees have all values stored in leaf nodes, which improves range queries.
Detailed Academic Explanation:
B+ Trees have all values stored in leaf nodes, which improves range queries. is the correct answer to “What is the primary benefit of using a B+ Tree over a B-Tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 5 of 40
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★ FPSC
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★ FPSC
Which property is maintained in a Red-Black Tree to ensure balanced height?
Correct Answer: Option A — Each path from a node to its descendant leaves has the same number of black nodes.
Detailed Academic Explanation:
Each path from a node to its descendant leaves has the same number of black nodes. is the correct answer to “Which property is maintained in a Red-Black Tree to ensure balanced height”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 6 of 40
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Who is the ancestor of Node G?
Correct Answer: Option A — C
Detailed Academic Explanation:
C is the correct answer to “Who is the ancestor of Node G”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 7 of 40
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Bigger the query rectangle the better is the query efficiency.
Correct Answer: Option B — false
Detailed Academic Explanation:
false is the correct answer to “Bigger the query rectangle the better is the query efficiency.”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 8 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Consider the given syntax tree. Assume that division has the lowest precedence than addition, subtraction and multiplication. Addition and subtraction have the same precedence but more than multiplication. Which of the following expression can be given by the following syntax tree?
[5 / (p + q) * (q - r)] is the correct answer to “Consider the given syntax tree. Assume that division has the lowest precedence than addition, subtraction and multiplication. Addition and subtraction have the same precedence but more than multiplication. Which of the following expression can be given by the following syntax tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 9 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the depth of the root node of K-ary tree?
Correct Answer: Option C — 0
Detailed Academic Explanation:
0 is the correct answer to “What is the depth of the root node of K-ary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 10 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In an expression tree algorithm, what happens when an operand is encountered?
Correct Answer: Option A — create one node pointing to a stack
Detailed Academic Explanation:
create one node pointing to a stack is the correct answer to “In an expression tree algorithm, what happens when an operand is encountered”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 11 of 40
★ PPSC
★ FPSC
★ PPSC
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How many extra nodes are there in Full K-ary tree than complete K-ary tree?
Correct Answer: Option D — Both have same number of nodes
Detailed Academic Explanation:
Both have same number of nodes is the correct answer to “How many extra nodes are there in Full K-ary tree than complete K-ary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 12 of 40
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★ FPSC
★ PPSC
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What is the depth of the root node of the ternary tree?
Correct Answer: Option C — 0
Detailed Academic Explanation:
0 is the correct answer to “What is the depth of the root node of the ternary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 13 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the Height of the given ternary tree?
Correct Answer: Option C — 2
Detailed Academic Explanation:
2 is the correct answer to “What is the Height of the given ternary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 14 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Who is descendant of Node B?
Correct Answer: Option D — Both E and F
Detailed Academic Explanation:
Both E and F is the correct answer to “Who is descendant of Node B”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 15 of 40
★ PPSC
★ FPSC
★ PPSC
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Which node is the Leaf node in the following K-ary tree?
Correct Answer: Option D — F
Detailed Academic Explanation:
F is the correct answer to “Which node is the Leaf node in the following K-ary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 16 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which node is the root node of the following ternary tree?
Correct Answer: Option A — A
Detailed Academic Explanation:
A is the correct answer to “Which node is the root node of the following ternary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 17 of 40
★ PPSC
★ FPSC
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What will be the time complexity of delete operation if all the candidates are evenly spaced so that each bin has constant no. of candidates? (m = number of bins intersecting candidate intersects)
Correct Answer: Option B — O(m)
Detailed Academic Explanation:
O(m) is the correct answer to “What will be the time complexity of delete operation if all the candidates are evenly spaced so that each bin has constant no. of candidates? (m = number of bins intersecting candidate intersects)”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 18 of 40
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★ FPSC
★ PPSC
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How many properties will an equivalent relationship satisfy?
Correct Answer: Option C — 3
Detailed Academic Explanation:
3 is the correct answer to “How many properties will an equivalent relationship satisfy”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 19 of 40
★ PPSC
★ FPSC
★ PPSC
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What is the size of Node B in given K-ary tree?
Correct Answer: Option A — 1
Detailed Academic Explanation:
1 is the correct answer to “What is the size of Node B in given K-ary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 20 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which data structure is used in the syntax analysis phase of the compiler?
Correct Answer: Option A — Tree
Detailed Academic Explanation:
Tree is the correct answer to “Which data structure is used in the syntax analysis phase of the compiler”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 21 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What will be the time complexity of insertion operation if all the candidates are evenly spaced so that each bin has constant no. of candidates? (m = number of bins intersecting candidate intersects)
Correct Answer: Option B — O(m)
Detailed Academic Explanation:
O(m) is the correct answer to “What will be the time complexity of insertion operation if all the candidates are evenly spaced so that each bin has constant no. of candidates? (m = number of bins intersecting candidate intersects)”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 22 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the worst case time complexity of insertion operation(n =no. of candidates)?
Correct Answer: Option A — O(1)
Detailed Academic Explanation:
O(1) is the correct answer to “What is the worst case time complexity of insertion operation(n =no. of candidates)”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 23 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the condition for an equivalence relation if two cities are related within a country?
Correct Answer: Option B — the two cities should have a two-way connection
Detailed Academic Explanation:
the two cities should have a two-way connection is the correct answer to “What is the condition for an equivalence relation if two cities are related within a country”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 24 of 40
★ PPSC
★ FPSC
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★ FPSC
When executing a sequence of Unions, a node of rank r must have at least 2 r descendants.
Correct Answer: Option A — true
Detailed Academic Explanation:
true is the correct answer to “When executing a sequence of Unions, a node of rank r must have at least 2 r descendants.”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 25 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In an abstract syntax tree, each internal node represents an operand and each leaf node represents an operator.
Correct Answer: Option B — False
Detailed Academic Explanation:
False is the correct answer to “In an abstract syntax tree, each internal node represents an operand and each leaf node represents an operator.”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 26 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Parse tree is constructed from the tokens produced by lexical analyzer.
Correct Answer: Option A — True
Detailed Academic Explanation:
True is the correct answer to “Parse tree is constructed from the tokens produced by lexical analyzer.”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 27 of 40
★ PPSC
★ FPSC
★ PPSC
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Which node is the child node of the Node D in the following ternary tree?
Correct Answer: Option D — No child node
Detailed Academic Explanation:
No child node is the correct answer to “Which node is the child node of the Node D in the following ternary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 28 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which node is the child node of the Node B in the following K-ary tree?
Correct Answer: Option D — No child node
Detailed Academic Explanation:
No child node is the correct answer to “Which node is the child node of the Node B in the following K-ary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 29 of 40
★ PPSC
★ FPSC
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★ FPSC
While evaluating the parse tree, which traversal technique is used to give the original input string?
Correct Answer: Option B — In-order traversal
Detailed Academic Explanation:
In-order traversal is the correct answer to “While evaluating the parse tree, which traversal technique is used to give the original input string”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 30 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the definition for Ackermann's function?
Correct Answer: Option A — A(1,i) = i+1 for i>=1
Detailed Academic Explanation:
A(1,i) = i+1 for i>=1 is the correct answer to “What is the definition for Ackermann's function”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 31 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the run time of finding the nearest neighbour in a k-d tree?
Correct Answer: Option C — O(2d log N)
Detailed Academic Explanation:
O(2d log N) is the correct answer to “What is the run time of finding the nearest neighbour in a k-d tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 32 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
An expression tree is a kind of?
Correct Answer: Option C — Binary tree
Detailed Academic Explanation:
Binary tree is the correct answer to “An expression tree is a kind of”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 33 of 40
★ PPSC
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What will be the correct sequence of insertion for the following k-d tree?
Correct Answer: Option C — (30,40),(5,25),(10,12),(70,70),(50,30),(35,45)
Detailed Academic Explanation:
(30,40),(5,25),(10,12),(70,70),(50,30),(35,45) is the correct answer to “What will be the correct sequence of insertion for the following k-d tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 34 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Can leaf node be called child node in a ternary tree?
Correct Answer: Option A — True
Detailed Academic Explanation:
True is the correct answer to “Can leaf node be called child node in a ternary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 35 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which node is the root node of the following K-ary tree?
Correct Answer: Option A — A
Detailed Academic Explanation:
A is the correct answer to “Which node is the root node of the following K-ary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 36 of 40
★ PPSC
★ FPSC
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★ FPSC
A node can have a minimum of one child.
Correct Answer: Option A — true
Detailed Academic Explanation:
true is the correct answer to “A node can have a minimum of one child.”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 37 of 40
★ PPSC
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★ FPSC
Is parent node of Node 4 and root node of the given K-ary tree same?
Correct Answer: Option A — True
Detailed Academic Explanation:
True is the correct answer to “Is parent node of Node 4 and root node of the given K-ary tree same”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 38 of 40
★ PPSC
★ FPSC
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★ FPSC
How many strategies are followed to solve a dynamic equivalence problem?
Correct Answer: Option B — 2
Detailed Academic Explanation:
2 is the correct answer to “How many strategies are followed to solve a dynamic equivalence problem”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 39 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Path Compression algorithm performs in which of the following operations?
Correct Answer: Option C — Find operation
Detailed Academic Explanation:
Find operation is the correct answer to “Path Compression algorithm performs in which of the following operations”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
Question 40 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which node is the child node of Node C in the following K-ary tree?
Correct Answer: Option C — G
Detailed Academic Explanation:
G is the correct answer to “Which node is the child node of Node C in the following K-ary tree”. This question is standard in competitive examination syllabi for Trees In Data Structures.
💡Key Conceptual Anchor:Trees In Data Structures
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Advanced Mapreduce Concepts — Part 1
Master the next curriculum module with 40 exam-standard MCQs.
In competitive commission exams (FPSC, PPSC, KPPSC, SPSC, CSS, PMS), questions are frequently phrased with distractor options designed to catch rote learners. Whenever you answer an MCQ, read the Detailed Academic Explanation and Conceptual Anchor to understand why the remaining options are incorrect.