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    which of the following is to provide a different interface for sequential containers?

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    Containers library

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    Containers library

    C++

    Containers library

    The Containers library is a generic collection of class templates and algorithms that allow programmers to easily implement common data structures like queues, lists and stacks. There are two (until C++11)three (since C++11) classes of containers:

    sequence containers,

    associative containers, and

    unordered associative containers,

    (since C++11)

    each of which is designed to support a different set of operations.

    The container manages the storage space that is allocated for its elements and provides member functions to access them, either directly or through iterators (objects with properties similar to pointers).

    Most containers have at least several member functions in common, and share functionalities. Which container is the best for the particular application depends not only on the offered functionality, but also on its efficiency for different workloads.

    Sequence containers

    Sequence containers implement data structures which can be accessed sequentially.

    array (C++11)

    static contiguous array

    (class template) vector

    dynamic contiguous array

    (class template) deque double-ended queue (class template) forward_list (C++11) singly-linked list (class template) list doubly-linked list (class template)

    Associative containers

    Associative containers implement sorted data structures that can be quickly searched (O(log n) complexity).

    set

    collection of unique keys, sorted by keys

    (class template) map

    collection of key-value pairs, sorted by keys, keys are unique

    (class template) multiset

    collection of keys, sorted by keys

    (class template) multimap

    collection of key-value pairs, sorted by keys

    (class template)

    Unordered associative containers (since C++11)

    Unordered associative containers implement unsorted (hashed) data structures that can be quickly searched (O(1) amortized, O(n) worst-case complexity).

    unordered_set (C++11)

    collection of unique keys, hashed by keys

    (class template) unordered_map (C++11)

    collection of key-value pairs, hashed by keys, keys are unique

    (class template) unordered_multiset (C++11)

    collection of keys, hashed by keys

    (class template) unordered_multimap (C++11)

    collection of key-value pairs, hashed by keys

    (class template)

    Container adaptors

    Container adaptors provide a different interface for sequential containers.

    stack

    adapts a container to provide stack (LIFO data structure)

    (class template) queue

    adapts a container to provide queue (FIFO data structure)

    (class template) priority_queue

    adapts a container to provide priority queue

    (class template) flat_set (C++23)

    adapts a container to provide a collection of unique keys, sorted by keys

    (class template) flat_map (C++23)

    adapts a container to provide a collection of key-value pairs, sorted by unique keys

    (class template) flat_multiset (C++23)

    adapts a container to provide a collection of keys, sorted by keys

    (class template) flat_multimap (C++23)

    adapts a container to provide a collection of key-value pairs, sorted by keys

    (class template)

    Iterator invalidation

    Read-only methods never invalidate iterators or references. Methods which modify the contents of a container may invalidate iterators and/or references, as summarized in this table.

    Category Container After insertion, are... After erasure, are... Conditionally

    iterators valid? references valid? iterators valid? references valid?

    Sequence containers array N/A N/A

    vector No N/A Insertion changed capacity

    Yes Yes Before modified element(s)

    (for insertion only if capacity didn't change)

    No No At or after modified element(s)

    deque No Yes Yes, except erased element(s) Modified first or last element

    No No Modified middle only

    list Yes Yes, except erased element(s)

    forward_list Yes Yes, except erased element(s)

    Associative containers set

    multiset map

    multimap Yes Yes, except erased element(s)

    Unordered associative containers unordered_set

    unordered_multiset unordered_map

    unordered_multimap No Yes N/A Insertion caused rehash

    Yes Yes, except erased element(s) No rehash

    Here, insertion refers to any method which adds one or more elements to the container and erasure refers to any method which removes one or more elements from the container.

    Examples of insertion methods are std::set::insert, std::map::emplace, std::vector::push_back, and std::deque::push_front.

    Note that std::unordered_map::operator[] also counts, as it may insert an element into the map.

    (since C++11)

    Examples of erasure methods are std::set::erase, std::vector::pop_back, std::deque::pop_front, and std::map::clear.

    स्रोत : en.cppreference.com

    C++ STANDARD LIBRARY MCQs Questions Answers

    In which classes we can define the list and vector classes? A. Abstract classes B. child classes C. STL classes D. String classes Ans: 2. By STL how many…

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    C++ STANDARD LIBRARY MCQs Questions Answers

    1. In which classes we can define the list and vector classes?

    A. Abstract classes B. child classes C. STL classes D. String classes Ans:

    Answer - Click Here:

    B

    2. By STL how many components it has been kept?

    A. 3 B. 4 C.1 D. unlimited Ans:

    Answer - Click Here:

    B

    3. Which of the following are the components of STL?

    A. Algorithms B. containers

    C. function, iterators

    D. All of these Ans:

    Answer - Click Here:

    D

    4. Which of the following is to provide a different interface for sequential containers?

    A. container adopters

    B. sequence containers

    C. queue

    D. Associative Containers

    Ans:

    Answer - Click Here:

    A

    5. In the given below which of the following file c header files contains the only function for manipulating null-terminated arrays of character?

    A. B. C. D. A&B both Ans:

    Answer - Click Here:

    C

    6. Container Adaptors provide a how many interface for sequential containers

    A. 2 B. 3 C. 4 D.1 Ans:

    Answer - Click Here:

    B

    7. Container Adaptors provide a different interface for sequential containers these are

    A. Queue B. priority Queue C. stack D. all of these Ans:

    Answer - Click Here:

    D

    8. The integer ASCII code has a range of.

    A. 0 to 500 B. 1 to 3000 C. 0 to 100 D. 200 to 227 Ans:

    Answer - Click Here:

    C

    9. Which of the following true about sequence container?

    A. Containers that implements sorted data structures for fast search in O(logn)

    B. Containers that implements data structures which can be accessed sequentially

    C. Containers that implements data structures which can be accessed non-sequentially

    D. none of these Ans:

    Answer - Click Here:

    B

    10. Which of the following are implemented through sorted data structures that can be quickly searched (O (log n) complexity)

    A. Associative Containers

    B. sequence container

    C. container adopter

    D. unordered associative containers

    Ans:

    Answer - Click Here:

    A

    11. In C++ how many sequence containers are provided?

    A. 3 B.1 C.5 D.2 Ans:

    Answer - Click Here:

    C

    12. In C++ how many container adopter are provided?

    A. 2 B.6 C.4 D.3 Ans:

    Answer - Click Here:

    D

    13. What are the unordered Associative Containers?

    A. implement sorted data structures that can be quickly searched (O(log n) complexity).

    B. implements unordered data structures that can be quickly searched

    C. implements data structures which can be accessed in a sequential manner.

    D. none of these Ans:

    Answer - Click Here:

    B

    14. The Unordered Associative Containers are implements unordered data structures that can be quickly searched

    A. unorder-set B. unorder-multiset C. unorder- map D. all of these Ans:

    Answer - Click Here:

    D

    15. Which of the following are true about unordered sequence container?

    A. these are implements through unordered data structures that can be quickly searched

    B. these are implements through data structures which can be accessed in a sequential manner

    C.A&B both

    D. these can be implemented through sorted data structures that can be quickly searched (O(log n) complexity).

    Ans:

    Answer - Click Here:

    A

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    Standard Template Library

    This set of C++ Programming Multiple Choice Questions & Answers (MCQs) focuses on “Standard Template Library”. 1. What is the Standard Template Library? a) Set of C++ template classes to provide common programming data structures and functions b) Set of C++ classes c) Set of Template functions used for easy data structures implementation d) Set ... Read more

    C++ Programming Questions and Answers – Standard Template Library

    « Prev Next »

    This set of C++ Programming Multiple Choice Questions & Answers (MCQs) focuses on “Standard Template Library”.

    1. What is the Standard Template Library?

    a) Set of C++ template classes to provide common programming data structures and functions

    b) Set of C++ classes

    c) Set of Template functions used for easy data structures implementation

    d) Set of Template data structures only

    View Answer

    2. Pick the correct statement.

    a) STL is a generalized library

    b) Components of STL are parameterized

    c) STL uses the concept of templates classes and functions to achieve generalized implementation

    d) All of the mentioned

    View Answer

    3. How many components STL has?

    a) 1 b) 2 c) 3 d) 4 View Answer

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    4. What are the containers?

    a) Containers store objects and data

    b) Containers stores all the algorithms

    c) Containers contain overloaded functions

    d) Containers contain set of Iterators

    View Answer

    5. In how many categories, containers are divided?

    a) 1 b) 2 c) 3 d) 4 View Answer

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    6. What are the Sequence Containers?

    a) Containers that implements data structures which can be accessed sequentially

    b) Containers that implements sorted data structures for fast search in O(logn)

    c) Containers that implements unsorted(hashed) data structures for quick search in O(1)

    d) Containers that implements data structures which can be accessed non-sequentially

    View Answer

    7. How many Sequence Containers are provided by C++?

    a) 2 b) 3 c) 4 d) 5 View Answer advertisement

    8. What are the Associative Containers?

    a) Containers that implements data structures which can be accessed sequentially

    b) Containers that implements sorted data structures for fast search in O(logn)

    c) Containers that implements unsorted(hashed) data structures for quick search in O(1)

    d) Containers that implements data structures which can be accessed non-sequentially

    View Answer

    9. How many Associative Containers are provided by C++?

    a) 2 b) 3 c) 4 d) 5 View Answer advertisement

    10. What are Unordered Associative Containers?

    a) Containers that implements data structures which can be accessed sequentially

    b) Containers that implements sorted data structures for fast search in O(logn)

    c) Containers that implements unsorted(hashed) data structures for quick search in O(1)

    d) Containers that implements data structures which can be accessed non-sequentially

    View Answer

    11. What are Container Adaptors?

    a) Containers that implements data structures which can be accessed sequentially

    b) Containers that implements sorted data structures for fast search in O(logn)

    c) Containers that implements unsorted(hashed) data structures for quick search in O(1)

    d) Containers that provide a different interface for sequential containers

    View Answer

    12. How many Container Adaptors are provided by C++?

    a) 2 b) 3 c) 4 d) 5 View Answer

    13. What are Iterators?

    a) Iterators are used to iterate over C-like arrays

    b) Iterators are used to iterate over pointers

    c) Iterators are used to point memory addresses of STL containers

    d) Iterators are used to iterate over functions

    View Answer

    14. How many types of Iterators are provided by C++?

    a) 2 b) 3 c) 4 d) 5 View Answer

    15. Which header file is used for Iterators?

    a) b) c) d)

    View Answer

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