Standard Libraries In Data Structures — Part 1 MCQs with Explanations
Practice high-yield Computer Science & IT MCQs on Standard Libraries In Data Structures — Part 1 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
Which C++ standard library provides functionalities for containers like vector, list, and map?
Correct Answer: Option C — <vector>
Detailed Academic Explanation:
<vector> is the correct answer to “Which C++ standard library provides functionalities for containers like vector, list, and map”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 2 of 40
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★ FPSC
★ PPSC
★ FPSC
In Python, which module provides a collection of high-performance data structures like deque and defaultdict?
Correct Answer: Option D — collections
Detailed Academic Explanation:
collections is the correct answer to “In Python, which module provides a collection of high-performance data structures like deque and defaultdict”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 3 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Java standard library class is used for implementing a resizable array?
Correct Answer: Option A — ArrayList
Detailed Academic Explanation:
ArrayList is the correct answer to “Which Java standard library class is used for implementing a resizable array”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 4 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the purpose of the heapq module in Python?
Correct Answer: Option D — To provide heap queue algorithms.
Detailed Academic Explanation:
To provide heap queue algorithms. is the correct answer to “What is the purpose of the heapq module in Python”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 5 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which C++ standard library header is used for input and output stream operations?
Correct Answer: Option C — <iostream>
Detailed Academic Explanation:
<iostream> is the correct answer to “Which C++ standard library header is used for input and output stream operations”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 6 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In Java, which class provides methods for sorting and searching arrays?
Correct Answer: Option B — Arrays
Detailed Academic Explanation:
Arrays is the correct answer to “In Java, which class provides methods for sorting and searching arrays”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 7 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which module in Python is commonly used for efficient mathematical operations on large arrays?
Correct Answer: Option C — numpy
Detailed Academic Explanation:
numpy is the correct answer to “Which module in Python is commonly used for efficient mathematical operations on large arrays”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 8 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which C++ library provides algorithms for sorting, searching, and manipulating sequences?
Correct Answer: Option D — <algorithm>
Detailed Academic Explanation:
<algorithm> is the correct answer to “Which C++ library provides algorithms for sorting, searching, and manipulating sequences”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 9 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What does the deque class in Python's collections module provide?
Correct Answer: Option A — A double-ended queue.
Detailed Academic Explanation:
A double-ended queue. is the correct answer to “What does the deque class in Python's collections module provide”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 10 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In C++, which header file is used to handle mathematical functions and constants?
Correct Answer: Option D — <cmath>
Detailed Academic Explanation:
<cmath> is the correct answer to “In C++, which header file is used to handle mathematical functions and constants”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 11 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Java class is used to create a thread-safe map that is part of the Java Collections Framework?
Correct Answer: Option C — ConcurrentHashMap
Detailed Academic Explanation:
ConcurrentHashMap is the correct answer to “Which Java class is used to create a thread-safe map that is part of the Java Collections Framework”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 12 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Python library is used to create and manipulate arrays of numerical data?
Correct Answer: Option B — numpy
Detailed Academic Explanation:
numpy is the correct answer to “Which Python library is used to create and manipulate arrays of numerical data”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 13 of 40
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★ FPSC
★ PPSC
★ FPSC
Which C++ standard library class is used for managing a sequence of elements with fast insertions and deletions?
Correct Answer: Option C — list
Detailed Academic Explanation:
list is the correct answer to “Which C++ standard library class is used for managing a sequence of elements with fast insertions and deletions”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 14 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In Python, which module provides a set of functions for functional programming, such as map and filter?
Correct Answer: Option D — functools
Detailed Academic Explanation:
functools is the correct answer to “In Python, which module provides a set of functions for functional programming, such as map and filter”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 15 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which header file in C++ provides support for random number generation?
Correct Answer: Option A — <random>
Detailed Academic Explanation:
<random> is the correct answer to “Which header file in C++ provides support for random number generation”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 16 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which C++ standard library header provides the unordered_map container?
Correct Answer: Option D — <unordered_map>
Detailed Academic Explanation:
<unordered_map> is the correct answer to “Which C++ standard library header provides the unordered_map container”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 17 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In Python, which module provides a collection of mathematical functions for operations on arrays?
Correct Answer: Option C — numpy
Detailed Academic Explanation:
numpy is the correct answer to “In Python, which module provides a collection of mathematical functions for operations on arrays”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 18 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Java class from the Collections Framework implements a thread-safe list?
Correct Answer: Option B — CopyOnWriteArrayList
Detailed Academic Explanation:
CopyOnWriteArrayList is the correct answer to “Which Java class from the Collections Framework implements a thread-safe list”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 19 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which C++ standard library class provides a set of functions for input and output operations?
Correct Answer: Option C — iostream
Detailed Academic Explanation:
iostream is the correct answer to “Which C++ standard library class provides a set of functions for input and output operations”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 20 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What does the itertools module in Python provide?
Correct Answer: Option D — Functions for creating iterators for efficient looping.
Detailed Academic Explanation:
Functions for creating iterators for efficient looping. is the correct answer to “What does the itertools module in Python provide”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 21 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which header file in C++ provides functionality for string manipulation?
Correct Answer: Option A — <string>
Detailed Academic Explanation:
<string> is the correct answer to “Which header file in C++ provides functionality for string manipulation”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 22 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In Java, which class provides the implementation of a doubly linked list?
Correct Answer: Option D — LinkedList
Detailed Academic Explanation:
LinkedList is the correct answer to “In Java, which class provides the implementation of a doubly linked list”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 23 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Python module is commonly used for creating and manipulating tuples?
Correct Answer: Option C — collections
Detailed Academic Explanation:
collections is the correct answer to “Which Python module is commonly used for creating and manipulating tuples”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 24 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the main use of the priority_queue in C++ Standard Library?
Correct Answer: Option B — To manage a collection of elements in a priority order.
Detailed Academic Explanation:
To manage a collection of elements in a priority order. is the correct answer to “What is the main use of the priority_queue in C++ Standard Library”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 25 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Java class is used for implementing a queue with priority order?
Correct Answer: Option C — PriorityQueue
Detailed Academic Explanation:
PriorityQueue is the correct answer to “Which Java class is used for implementing a queue with priority order”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 26 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In Python, which module allows for efficient implementations of various algorithms and data structures?
Correct Answer: Option D — heapq
Detailed Academic Explanation:
heapq is the correct answer to “In Python, which module allows for efficient implementations of various algorithms and data structures”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 27 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which C++ header provides functionality for managing sets and their operations?
Correct Answer: Option C — <set>
Detailed Academic Explanation:
<set> is the correct answer to “Which C++ header provides functionality for managing sets and their operations”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 28 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which standard library class in C++ supports both ordered and unordered associative containers?
Correct Answer: Option D — unordered_map
Detailed Academic Explanation:
unordered_map is the correct answer to “Which standard library class in C++ supports both ordered and unordered associative containers”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 29 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What does the random module in Python provide?
Correct Answer: Option A — Functions for generating random numbers.
Detailed Academic Explanation:
Functions for generating random numbers. is the correct answer to “What does the random module in Python provide”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 30 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Java standard library provides utility functions for manipulating strings?
Correct Answer: Option D — StringBuilder
Detailed Academic Explanation:
StringBuilder is the correct answer to “Which Java standard library provides utility functions for manipulating strings”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 31 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which C++ standard library header provides functions for manipulating strings using regular expressions?
Correct Answer: Option C — <regex>
Detailed Academic Explanation:
<regex> is the correct answer to “Which C++ standard library header provides functions for manipulating strings using regular expressions”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 32 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In Python, which module is used to work with file and directory operations?
Correct Answer: Option B — os
Detailed Academic Explanation:
os is the correct answer to “In Python, which module is used to work with file and directory operations”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 33 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Java class provides methods for fixed-size arrays with automatic resizing?
Correct Answer: Option C — ArrayList
Detailed Academic Explanation:
ArrayList is the correct answer to “Which Java class provides methods for fixed-size arrays with automatic resizing”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 34 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What functionality does the itertools module in Python offer?
Correct Answer: Option D — Iterators for efficient looping.
Detailed Academic Explanation:
Iterators for efficient looping. is the correct answer to “What functionality does the itertools module in Python offer”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 35 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which header file in C++ provides support for atomic operations and memory models?
Correct Answer: Option A — <atomic>
Detailed Academic Explanation:
<atomic> is the correct answer to “Which header file in C++ provides support for atomic operations and memory models”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 36 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In Java, which class provides a collection that maintains the order of elements based on their insertion?
Correct Answer: Option D — LinkedHashSet
Detailed Academic Explanation:
LinkedHashSet is the correct answer to “In Java, which class provides a collection that maintains the order of elements based on their insertion”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 37 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Python module is specifically designed for efficient mathematical operations on large data sets?
Correct Answer: Option C — numpy
Detailed Academic Explanation:
numpy is the correct answer to “Which Python module is specifically designed for efficient mathematical operations on large data sets”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 38 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which C++ standard library provides algorithms for manipulating data in a functional programming style?
Correct Answer: Option B — <functional>
Detailed Academic Explanation:
<functional> is the correct answer to “Which C++ standard library provides algorithms for manipulating data in a functional programming style”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 39 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What does the math module in Python provide?
Correct Answer: Option A — Mathematical functions and constants.
Detailed Academic Explanation:
Mathematical functions and constants. is the correct answer to “What does the math module in Python provide”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
Question 40 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which Java class is used to handle concurrent tasks in a multi-threaded environment?
Correct Answer: Option D — ExecutorService
Detailed Academic Explanation:
ExecutorService is the correct answer to “Which Java class is used to handle concurrent tasks in a multi-threaded environment”. This question is standard in competitive examination syllabi for Standard Libraries In Data Structures.
💡Key Conceptual Anchor:Standard Libraries In Data Structures
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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.