What is the difference between map and multimap associative containers Mcq?

The map and the multimap are both containers that manage key/value pairs as single components. The essential difference between the two is that in a map the keys must be unique, while a multimap permits duplicate keys.

What are associative containers Mcq?

Explanation: Associative containers refer to a group of class templates in the standard library of the C++ programming language that implements ordered associative arrays. 2.

Which of the following is an associative container?

The following containers are defined in the current revision of the C++ standard: set , map , multiset , multimap . Each of these containers differ only on constraints placed on their elements.

Which of the following is true when we apply &( Addressof operator to a reference variable?

Which of the following is true when we apply &(addressof) operator to a reference variable? A. The address of the object pointed by the reference is returned.

What are sequence containers derived containers and associative containers?

Sequence containers implement data structures that can be accessed sequentially. Associative containers implement sorted data structures that can be quickly searched (O(log n) complexity). Map: Collection of key-value pairs, sorted by keys, keys are unique (class template).

OOP | STL |Associative Container | map and multimap

What is associative container explain any two associative containers with their functions?

In standard template libraries, they refer to the group of class templates used to implement associative arrays. They are used to store elements but have some constraints placed on their elements. There exists a key. In case of map and set, key is unique.

How many associative containers are provided by C++ Mcq?

Explanation: C++ provides 4 types of Associative Containers namely Set, Map, multiset and multimap.

Which of the following is the correct difference between references and pointers Mcq?

What is the difference between references and pointers? Explanation: References are an alias/another name for a variable whereas pointer stores the address of a variable.

Which of the following is the correct difference between references vs pointers?

References are used to refer an existing variable in another name whereas pointers are used to store address of variable. References cannot have a null value assigned but pointer can. A reference variable can be referenced by pass by value whereas a pointer can be referenced by pass by reference.

What do you understand by a de referencing and referencing operator?

The dereference operator is also known as an indirection operator, which is represented by (*). When indirection operator (*) is used with the pointer variable, then it is known as dereferencing a pointer. When we dereference a pointer, then the value of the variable pointed by this pointer will be returned.

Is a map a container?

std::map is a sorted associative container that contains key-value pairs with unique keys. Keys are sorted by using the comparison function Compare . Search, removal, and insertion operations have logarithmic complexity. Maps are usually implemented as red-black trees.

Which of the following is unordered associative containers?

The four unordered associative containers are called unordered_set , unordered_multiset , unordered_map , and unordered_multimap .

Why Is set an associative container?

An AssociativeContainer is an ordered Container that provides fast lookup of objects based on keys. So what makes it associative? The fact that elements in a set are referenced by their key and not by their absolute position in the container. The key, of course, is the element itself.

What is map in C++?

What is a map in C++? A C++ map is a way to store a key-value pair. A map can be declared as follows: #include <iostream> #include <map> map<int, int> sample_map; Each map entry consists of a pair: a key and a value.

What is map in C Plus Plus?

Maps are part of the C++ STL (Standard Template Library). Maps are the associative containers that store sorted key-value pair, in which each key is unique and it can be inserted or deleted but cannot be altered. Values associated with keys can be changed.

What are iterators Mcq?

Explanation: Iterators are STL components used to point a memory address of a container. They are used to iterate over container classes.

What is the difference between reference variable and pointer variable?

Pointers: A pointer is a variable that holds memory address of another variable. A pointer needs to be dereferenced with * operator to access the memory location it points to. References : A reference variable is an alias, that is, another name for an already existing variable.

What is the difference between pointer and reference in Java?

Reference: A reference is a variable that refers to something else and can be used as an alias for that something else. Pointer: A pointer is a variable that stores a memory address, for the purpose of acting as an alias to what is stored at that address.

What is the difference between a pointer and a reference C++?

Differences between pointers and references in C++

A pointer in C++ is a variable that holds the memory address of another variable. A reference is an alias for an already existing variable. Once a reference is initialized to a variable, it cannot be changed to refer to another variable.

Which of the following describes a difference between template function and template class in C++?

What is the difference between normal function and template function? Explanation: As a template feature allows you to write generic programs. therefore a template function works with any type of data whereas normal function works with the specific types mentioned while writing a program.

Which of the following is the correct operator to compare two variables?

== Equality operator is used for checking if two variables are equal.

How many associative containers are provided by C++? Explain?

In the C++ Standard Library, there are four ordered associative containers and four unordered associative containers. The four ordered associative containers are multiset, set, multimap, and map.

Which data structure is used by map in C++ Mcq?

map is often implemented using red-black trees, while unordered_map is often implemented using hash tables.

Which are not full container classes in C++ Mcq?

6. Which are not full container classes in c++? Explanation: Container adaptors are not full container classes, but classes that provide a specific interface relying on an object of one of the container classes such as deque or list to handle the elements.