Standard Template Library (STL) in C++ MCQ question and answer with solution

Standard Template Library (STL) in C++ MCQ question and answer with solution | C++ Programimg MCQs

Learn Standard Template Library (STL) in C++ MCQ Questions and answers with easy and logical explanations in C++ Programimg. Standard Template Library (STL) in C++ MCQ question provides all type of technical mcq questions which is important for technical exams, campus exams and other entrance examination. Page-2 section-1

Which container in C++ STL does not preserve the order of elements?

A) vector B) list C) set D) map

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Answer & Solution

Answer: Option C

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What is the time complexity of searching for an element in a set in C++ STL?

A) O(1) B) O(log n) C) O(n) D) O(n log n)

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Answer: Option B

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Which algorithm in C++ STL is used to merge two sorted ranges into a single sorted range?

A) merge B) sort C) concatenate D) combine

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Answer: Option A

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What is the purpose of the 'std::unordered_map' container in C++ STL?

A) To store elements in key-value pairs with constant-time access B) To store elements in a sorted sequence with constant-time access C) To store elements in a stack with constant-time access D) To store elements in a queue with constant-time access

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Answer: Option A

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Which algorithm in C++ STL is used to remove all occurrences of a value from a container?

A) remove B) erase C) delete D) eliminate

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Answer: Option B

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What is the purpose of the 'std::deque' container in C++ STL?

A) To provide dynamic array-like functionality with efficient insertion and deletion at both ends B) To store elements in a sorted sequence C) To store elements in a stack D) To store elements in a queue

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Answer: Option A

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Which algorithm in C++ STL is used to count the number of occurrences of a value in a range?

A) count B) find C) search D) find_count

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Answer: Option A

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What is the time complexity of inserting an element into a set in C++ STL?

A) O(log n) B) O(1) C) O(n) D) O(n log n)

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Answer: Option A

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Which container in C++ STL is typically implemented using a red-black tree?

A) vector B) list C) set D) map

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Answer: Option C

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What is the purpose of the 'std::priority_queue' container in C++ STL?

A) To store elements in a sorted sequence with constant-time access to the largest element B) To store elements in a sorted sequence with constant-time access to the smallest element C) To store elements in a stack with constant-time access to the largest element D) To store elements in a queue with constant-time access to the largest element

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Answer: Option C

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