Class Hierarchies, Library & Containers Quiz 4

1 / 50

vptr is _______________

a real pointer

used to resolve self-references

passed as a parameter to all functions of class

like this pointer of class

2 / 50

What is the default random engine?

Mersenne Twister 19937 generator generating 32-bit pseudo random number

Random number engine that generates pseudo-random numbers

Mersenne Twister 19937 generator generating 32-bit true random number

Random number engine that generates true random numbers

3 / 50

What is linear_congruential_engine?

Pseudo-random number engine that generates random unsigned integers in the range [0, 2w-1] for some w using lagged Fibonacci generator

Pseudo-random number engine that generates random unsigned integers

Pseudo-random number engine that generates random unsigned integers in the range [0, 2w-1] for some w using Mersenne Twister algorithm

Pseudo-random number engine that generates random signed integers in the range [0, 2w-1] for some w using Mersenne Twister algorithm

4 / 50

Which classes can have vtable?

Classes having friend functions

All classes have a vtable

Classes having static functions

Classes having virtual functions

5 / 50

What is a Random number generator?

A generator that generates a simple random number

A generator that generates non-deterministic random numbers

A generator that generates both non-deterministic random numbers and deterministic random numbers

A generator that generates deterministic random numbers

6 / 50

What is Pseudo-random number engines?

Uses initial seed based algorithm to generate random numbers

Random number generates depends on the program

Uses user input for random number generation

Uses an algorithm that does not require any initial seed to generate random numbers

7 / 50

What is the full form of vptr?

V type Pointer

Virtual-vector Pointer

Virtual Pointer

Vector Pointer

8 / 50

What are different operations are used in Pseudo-random number engines?

all of the mentioned

min()

max()

operator()

9 / 50

Which of the following is correct about extent() function?

Returns the size of the 1st dimension

Returns the size of a given dimension

Returns how many total elements can be stored in an array

Returns how many elements are in array currently

10 / 50

Which function is used to check whether a given sequence is heap or not?

is_heap_until()

check_heap()

is_heap()

sort_heap()

11 / 50

Which type of heap is implemented in STL heap?

middle heap

close heap

max heap

min heap

12 / 50

What is mersenne_twister_engine?

Pseudo-random number engine that generates random signed integers in the range [0, 2w-1] for some w using Mersenne Twister algorithm

Pseudo-random number engine that generates random unsigned integers in the range [0, 2w-1] for some w using lagged Fibonacci generator

Pseudo-random number engine that generates random unsigned integers in the range [0, 2w-1] for some w using Mersenne Twister algorithm

Pseudo-random number engine that generates random unsigned integers

13 / 50

What are Distributions in C++?

Objects that converts a sequence into a sequence having a descending order

Objects that converts a sequence into a sequence having an ascending order

Objects that converts a sequence into a sequence having only the smallest, largest and median

Objects that converts a sequence into a sequence having specific random variable distribution

14 / 50

What is the use of reset() function?

Used to destroys the contained object in any variable

Used to change the object any container is holding

Used to check the type of any variable

Used to empty any container value

15 / 50

Which of the following is the correct way of declaring a tuple?

tuple <type1, type2, type3> tp;

tuple tp = new tuple<type1, type2, type3>;

tuple tp<type1, type2, type3>;

Tuple <type1, type2, type3> tp;

16 / 50

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

Used to change the object any container is holding

Used to destroys the contained object in any variable

Used to check whether any container is empty or not

Used to return the type information about the any container

17 / 50

Which of the following is correct about remove_all_extents() function?

Removes the first dimension from the left of the array

Removes the last dimension from the left of the array

Removes the first dimension from the right of the array

Removes the all dimension from an array

18 / 50

Which function is used to construct heap from given sequence of numbers?

construct_heap()

create_heap()

start_heap()

make_heap()

19 / 50

Which header file is used for generating random numbers?

<gen_dist>

20 / 50

How many Engine Adaptors are there in C++?

21 / 50

Which of the following is correct syntax of making heap from a vector v?

make_heap(v);

make_heap(v.begin(), v.end());

make_heap(v.end(), v.begin());

make_heap(v.elements);

22 / 50

Which header file is required to use tuples in your program?

<array>

<stl>

<tuple>

23 / 50

Which of the following function is used to initialize a tuple?

make_pair()

make_Tuple()

make_tuple()

make()

24 / 50

Which of the following is correct about remove_extent() function?

Removes the given dimension from an array

Removes the first dimension from the left of the array

Removes the first dimension from the right of the array

Removes the last dimension from the left of the array

25 / 50

Which of the following is correct about swap()?

Swaps elements of a tuple alternatively

Swaps last elements of two tuples

Swaps two tuples

Swaps first element of both tuples

26 / 50

What is vptr?

A hidden pointer in a class that points to virtual members of the class of that class

A hidden pointer in a class that points to a virtual table of that class

A pointer in a class that points to other class

A hidden pointer in a class that points to virtual functions of that class

27 / 50

What is vtable in C++?

Lookup table to resolve function calls in static manners

Lookup table to see which are the functions available for calls throughout the program

Lookup table to resolve function calls in dynamic manners

Lookup table to check how many functions are there int he program

28 / 50

What are Engine Adaptors?

Random number engine that generates pseudo-random numbers

Mersenne Twister 19937 generator generating 32-bit true random number

Class template that adopts a pseudo-random number generator engine to produce numbers with a given numbers of bits

Class template that adopts a pseudo-random number generator engine

29 / 50

Which of the following is correct about tuples?

Elements of tuples are initialized in order

A tuple can hold more than one element

All of the mentioned

A tuple can hold elements having different types

30 / 50

What is subtract_with_carry_engine?

Pseudo-random number engine that generates random signed integers in the range [0, 2w-1] for some w using Mersenne Twister algorithm

Pseudo-random number engine that generates random unsigned integers in the range [0, 2w-1] for some w using lagged Fibonacci generator

Pseudo-random number engine that generates random unsigned integers in the range [0, 2w-1] for some w using Mersenne Twister algorithm

Pseudo-random number engine that generates random unsigned integers

31 / 50

What is the use of is_heap_until() function?

Returns the iterator of the position till that the sequence is a heap

Returns the iterator of the last element of the sequence always

Returns the iterator to the position from where the sequence is a heap

Returns the iterator of the first element of the sequence

32 / 50

How many Pseudo-random number engines are there?

33 / 50

What is the use of get() function in tuples?

To delete an element

To print an element of a tuple

To access an element of a tuple

To check whether the element of the tuple is empty

34 / 50

What is the full form of vtable?

Virtual table

V type table

Vector table

Virtual-vector table

35 / 50

Which of the header file is used for array type manipulation?

<type_traits>

std namespace

<array>

36 / 50

What is the use of rank() function in C++?

Returns how many total elements can be stored in an array

Returns how many elements are in array currently

Returns size of each dimension

Returns the dimension of an array

37 / 50

What is the use of tie() function?

Used to check whether two tuples are the same or not

Used to delete elements

Used to replace elements

Used to unpack the values of a tuple

38 / 50

1. What is random_device?

Time-dependent random number generator

A true random number generator

Simple random number generator

A pseudo-random number generator

39 / 50

Which header file is required to use heap in your program?

<map>

<heap>

40 / 50

What is the use of front() function in heap?

Returns the element closest to mean of a sequence

Returns the last element of the heap

Returns the first element of the heap

Returns the element closest to the median of a sequence

41 / 50

What are the tuples in C++?

Objects that can hold more than one element of the same types

Objects that can hold more than one element of different types

Objects that can hold a single element of complex type

Objects that can hold a single element of fundamental type

42 / 50

What is the use of is_same() function in C++?

To check if two variable is of array type or not

To check whether two variables are different or not

To check whether two variables have the same characteristics

To check if a variable is array type or not

43 / 50

In how many ways we can handle errors in any class?

44 / 50

1. What is the use of sort_heap() function in heap?

To sort the second half of the heap

To sort the first half of the heap

To sort the elements in the heap into ascending order

To sort the elements in the heap into descending order

45 / 50

Which function is used to insert an element into heap?

push_back()

pop_heap()

push_heap()

pop_back()

46 / 50

Which algorithm is used in subtract_with_carry_engine?

Either the Mersenne Twister algorithm or Lagged fibonacci generator algorithm

Lagged fibonacci generator algorithm

Fibonacci generator

Mersenne Twister algorithm

47 / 50

Which of the following is correct about tuple_size?

Returns the total number of bits used by the tuple

Returns the sum of non-string values

Returns the maximum sized type element

Returns the number of elements in a tuple

48 / 50

What is the use of is_array() function in C++?

To check if a variable is 2-D array type or not

To check if a variable is 1-D or 2-D array type or not

To check if a variable is 1-D array type or not

To check if a variable is array type or not

49 / 50

Elements in STL heap are removed in ________________________

decreasing order

increasing order

input order

alternate i.e. once max element then min element

50 / 50

What are the Generators in C++?

An object that generates a number from a given sequence

An object that generates the smallest number from a given range

An object that generates unique numbers

An object that generates uniformly distributed numbers

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