Class Hierarchies, Library & Containers Quiz 3

1 / 50

Which header file is required to use any container?

<stl>

<any>

<container-any>

2 / 50

Pick the incorrect statement.

Vectors have a dynamic size

Insertion in vectors always takes constant time

Vectors are placed in contiguous storage

Vectors insert the element at the end

3 / 50

Which operator is used to access the first or second element of a pair?

[]

4 / 50

What is the use of empty() function in array classes?

To check how many elements are there in the array

To check whether an array is empty or not

To check whether an array contains negative elements or not

To check whether the size of an array is zero or not

5 / 50

How the list differs from vectors?

There is no capacity defined for list

All of the mentioned

Vector is contiguous whereas List is non-contiguous

Insertion in the list takes constant time whereas it is not constant in vectors

6 / 50

Which is the following is syntactically correct for vector v?

vector <int> :: iterator itr = v.cbegin();

vector <int> :: iterator itr = v.begin();

vector <int> :: const_iterator itr = v.rbegin();

vector <int> :: reverse_iterator itr = v.begin();

7 / 50

Which of the following(s) is/are the correct way of assigning values to a forward_list f?

f.assign(10,5)

both f.assign({1,2,3,4,5}) and f.assign(10,5)

f.assign({1,2,3,4,5})

f.assign(1,1,1,1)

8 / 50

What are the vectors?

Same as array classes

Arrays with different types of elements

Arrays with dynamic size

Arrays with static size but use template classes

9 / 50

What happens if a pair is not initialized?

Second is initialized to zero or null and first is initialized a garbage value

Both first and second part is initialized a garbage value

First is initialized to zero or null and second is initialized a garbage value

Both first and second part is initialized to zero or null

10 / 50

What is the correct syntax of declaring an array class?

Array<type,size> arr;

Array<type> arr;

array<type> arr;

array<type,size> arr;

11 / 50

Which of the following(s) can be used to access the last element of a vector v?

v.cend()

both v.end() and v.cend()

v.end()

vectors do not have a function to access the last element

12 / 50

1. Which of the following is correct way of copying the values of pair p1 into other pair p2?

pair <type,type> p2 = p1;

Both pair <type,type> p2 = p1; and pair <type,type> p2(p1);

Pair <int,int> p2.copy(p1);

pair <type,type> p2(p1);

13 / 50

Which type of list a List sequence container implements?

A simple sequence of array

Singly Linked List

Both type of list

Doubly Linked List

14 / 50

Which function is used to access the last element of an array class?

start()

back()

end()

last()

15 / 50

Which type of list a Forward_list sequence container implements?

Doubly Linked List

Singly Linked List

A simple sequence of array

Both type of list

16 / 50

Which function is used to get the total capacity of a vector?

v.no_of_elements()

v.capacity()

v.max_size()

v.size()

17 / 50

Which of the following is the correct syntax of accessing the second element of a pair p?

p[0]

p.second

p.first

p[1]

18 / 50

Pick the correct statement.

Both vectors and Array classes have a static size

Vectors have static size whereas Array classes have a dynamic size

Both vectors and Array classes have a dynamic size

Vectors have dynamic size whereas Array classes have a static size

19 / 50

Which exception is thrown if the typecasting is not done properly?

bad_any_cast

type_mismatched

bad_cast_mismatched

bad_type_cast

20 / 50

Which function is used to swap two vectors?

swap()

change()

exchange()

merge()

21 / 50

1. What is the difference between get() and at()?

all of the mentioned

get() takes array class as a parameter whereas at() takes a constant integer(i.e. index) as a parameter

at() is available under <array> header file whereas get() is available under <tuple> header file

at() is a member function of array class whereas get() is not

22 / 50

What is the use of type() function in any container?

Used to check whether a container is empty or not

Used to destroys the contained object in any variable

Used to return the type information about the any container

Used to change the object any container is holding

23 / 50

What is the syntax of declaraing a forward_list?

forward_list<type,size> f;

forward_list f<type>;

forward_list f;

forward_list<type> f;

24 / 50

What is the syntax of swap()?

swap[arr1, arr2];

arr1.swap(arr2);

swap<int, int>(arr1, arr2);

swap(arr1, arr2);

25 / 50

Which of the following function is used to get the actual number of elements stored in vector?

v.no_of_elements()

v.size()

v.max_size()

v.capacity()

26 / 50

Which of the following Operator cannot be used with pairs?

27 / 50

What is the use of swap() function in array class?

Swaps same elements of the array if required

Swaps two arrays

Swaps two elements given indices of elements

Swaps two elements of an array given elements

28 / 50

What is the difference between begin() and cbegin() in vectors?

both are same

begin() returns an iterator to first element whereas cbegin() returns constant iterator to first element

begin() returns iterator to first element and cbegin() returns iterator to last element

begin() returns returns first element cbegin() returns void

29 / 50

Which of the following syntax is used to convert any variable to its original type?

any_cast<original_type>(variable_name);

any_cast<variable_name>();

<original_type>(variable_name);

any_cast(variable_name);

30 / 50

In how many different ways any-container can be constructed?

31 / 50

What is the difference between begin() and rbegin()?

both are the same

begin() returns an iterator to the first element and rbegin() returns an iterator to an element kept at the end of the vector

begin() returns returns first element rbegin() returns void

begin() returns an iterator to first element whereas rbegin() returns constant iterator to first element

32 / 50

Which of the following header file is required for forwawrd_list?

<list>

<f_list>

<Forward_List>

<forward_list>

33 / 50

Which of the following is the correct syntax of using pair p?

pair p <type,type>;

pair <type,type> p;

pair p [type,type];

pair [type,type] p;

34 / 50

Which of the following(s) can be used to access the first element of a vector v?

v.cbegin()

all of the mentioned

v.begin()

v[0]

35 / 50

How many list sequence containers are provided by STL?

36 / 50

Which function is used to check whether the vector is empty or not?

isempty()

none()

haveElements()

empty()

37 / 50

What is any in C++?

Template data type

Fundamental type provided by C++

STL container used to store a single value of any type

Exception class in C++

38 / 50

What is the use of fill() function in array class?

To replace all the elements of the array which are equal to the given value

To fill an array with a given single value

To delete all the elements that are equal to the given value

To check whether given element fills the array or not

39 / 50

Which of the following header file is needed to use vectors in your program?

<stdio>

<array>

40 / 50

What is the use of emplace() function?

Used to check the type of any variable

Used to empty any container value

Used to add more item to the any list

Used to change the object any container is holding

41 / 50

How the size of a vector increases once it is full?

Vector increases its capacity by half of its previous size

Vector increases its capacity one by one

Vector doubles its capacity after it is full

Vector increases its capacity by a constant factor

42 / 50

Which function is used to access the first element of an array class?

first()

back()

start()

front()

43 / 50

Which header file is required to use pair container in your program?

<pair>

44 / 50

Which header file is required to use get() function?

<array>

<Array>

<tuple>

45 / 50

What is the syntax of printing the first element of an array Arr using get() function?

get<0>(Arr)

Arr.get[0]

get<0>[Arr]

Arr.get(0)

46 / 50

Which of the following function is used to insert an element at the end of a vector?

end()

front()

push_back()

pop_back()

47 / 50

Which of the following operations can be performed on a pair?

Assignment of pairs

Comparison of two pairs

All of the mentioned

Copying of one pair to another

48 / 50

Which of the following function(s) is/are used to get the size of the array class?

max_size()

get_size()

both size() and max_size()

size()

49 / 50

What is a pair?

Container consisting of one header and two data elements of the same type

Container consisting of two data elements of different type

Container consisting of two data elements of the same type

Container consisting of two data elements can have the same or different type

50 / 50

Which of the following is the correct syntax of accessing the first element of a pair p?

p.second

p[1]

p[0]

p.first

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