Standard Template Library _Stl_ In C Plus Plus — Part 1 MCQs with Explanations

The purpose of the 'std::multiset' container in C++ STL is to store multiple elements in sorted order. Unlike a std::set , which only stores unique elements, a std::multiset allows multiple occurrences of the same element. The elements in a std::multiset are always sorted according to a specified sorting criterion, which is by default the operator< . This makes std::multiset useful when you need to maintain a collection of sorted elements with duplicates allowed.

The <exception> header in C++ is specifically designed to handle errors and unusual situations that occur during the execution of a program. It defines a hierarchy of standard exception classes , such as std::exception , std::bad_alloc , std::runtime_error , and others. These classes are used to represent different types of errors and provide a way to report and handle them gracefully. Option B is incorrect because <exception> doesn't contain all standard library files. Option C is partially correct, as exceptions can be raised, but <exception> primarily *defines* the exception classes, not directly raise them (though you can throw instances of these classes). Option D is incorrect because <exception> has nothing to do with reducing memory size. Its purpose is for error handling.

<vector> is the correct answer to “Which header file is used to include the vector container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

Standard Template Library is the correct answer to “What does STL stand for in C++”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To sort elements of a container is the correct answer to “What is the purpose of the 'std::sort' function in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

set is the correct answer to “Which container in C++ STL does not allow duplicate elements”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

O(1) is the correct answer to “What is the time complexity of accessing an element in a vector in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

max_element is the correct answer to “Which algorithm in C++ STL is used to find the maximum element in a range”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To store elements in key-value pairs is the correct answer to “What is the purpose of the 'std::map' container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

list is the correct answer to “Which container in C++ STL is implemented as a doubly linked list”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To store unique elements in sorted order is the correct answer to “What is the purpose of the 'std::set' container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

Reverses the order of elements in a range is the correct answer to “What does the 'std::reverse' algorithm do in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

set is the correct answer to “Which container in C++ STL does not preserve the order of elements”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

O(log n) is the correct answer to “What is the time complexity of searching for an element in a set in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

merge is the correct answer to “Which algorithm in C++ STL is used to merge two sorted ranges into a single sorted range”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To store elements in key-value pairs with constant-time access is the correct answer to “What is the purpose of the 'std::unordered_map' container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

erase is the correct answer to “Which algorithm in C++ STL is used to remove all occurrences of a value from a container”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To provide dynamic array-like functionality with efficient insertion and deletion at both ends is the correct answer to “What is the purpose of the 'std::deque' container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

count is the correct answer to “Which algorithm in C++ STL is used to count the number of occurrences of a value in a range”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

O(log n) is the correct answer to “What is the time complexity of inserting an element into a set in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

set is the correct answer to “Which container in C++ STL is typically implemented using a red-black tree”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To store elements in a stack with constant-time access to the largest element is the correct answer to “What is the purpose of the 'std::priority_queue' container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

find is the correct answer to “Which algorithm in C++ STL is used to find the first occurrence of a value in a range”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

O(1) is the correct answer to “What is the time complexity of removing an element from a list in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To provide last-in, first-out (LIFO) access to elements is the correct answer to “What is the purpose of the 'std::stack' container adapter in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

find_end is the correct answer to “Which algorithm in C++ STL is used to find the last occurrence of a value in a range”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

O(log n) is the correct answer to “What is the time complexity of searching for an element in a map in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

merge is the correct answer to “Which algorithm in C++ STL is used to find the union of two sorted ranges”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To provide first-in, first-out (FIFO) access to elements is the correct answer to “What is the purpose of the 'std::queue' container adapter in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

O(log n) is the correct answer to “What is the time complexity of removing an element from a priority queue in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

set_intersection is the correct answer to “Which algorithm in C++ STL is used to find the intersection of two sorted ranges”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To store unique elements in a hash table is the correct answer to “What is the purpose of the 'std::unordered_set' container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

nth_element is the correct answer to “Which algorithm in C++ STL is used to find the median of a range of elements”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To store multiple elements in a hash table is the correct answer to “What is the purpose of the 'std::unordered_multiset' container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

set_difference is the correct answer to “Which algorithm in C++ STL is used to find the difference between two sorted ranges”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

O(1) is the correct answer to “What is the time complexity of searching for an element in an unordered_set in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

set_symmetric_difference is the correct answer to “Which algorithm in C++ STL is used to find the symmetric difference between two sets”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To store multiple key-value pairs in a hash table is the correct answer to “What is the purpose of the 'std::unordered_multimap' container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

rotate is the correct answer to “Which algorithm in C++ STL is used to rotate the elements in a range”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.

To represent a fixed-size sequence of bits is the correct answer to “What is the purpose of the 'std::bitset' container in C++ STL”. This question is standard in competitive examination syllabi for Standard Template Library _Stl_ In C Plus Plus.