Class Hierarchies, Library & Containers Quiz 4

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What is a Random number generator?

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

A generator that generates a simple random number

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What are the tuples in C++?

Objects that can hold more than one element of different types

Objects that can hold a single element of fundamental type

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

Objects that can hold a single element of complex type

3 / 50

Which algorithm is used in subtract_with_carry_engine?

Either the Mersenne Twister algorithm or Lagged fibonacci generator algorithm

Mersenne Twister algorithm

Lagged fibonacci generator algorithm

Fibonacci generator

4 / 50

Which function is used to insert an element into heap?

pop_heap()

pop_back()

push_heap()

push_back()

5 / 50

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

make_Tuple()

make()

make_pair()

make_tuple()

6 / 50

What is the full form of vtable?

Virtual-vector table

V type table

Virtual table

Vector table

7 / 50

How many Engine Adaptors are there in C++?

8 / 50

What is the use of tie() function?

Used to check whether two tuples are the same or not

Used to replace elements

Used to unpack the values of a tuple

Used to delete elements

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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

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 in the range [0, 2w-1] for some w using lagged Fibonacci generator

10 / 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 Mersenne Twister algorithm

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 lagged Fibonacci generator

11 / 50

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

make_heap(v.elements);

make_heap(v);

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

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

12 / 50

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

Returns how many elements are in array currently

Returns how many total elements can be stored in an array

Returns the dimension of an array

Returns size of each dimension

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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 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 Mersenne Twister algorithm

14 / 50

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

Returns the size of a given dimension

Returns how many total elements can be stored in an array

Returns the size of the 1st dimension

Returns how many elements are in array currently

15 / 50

Which type of heap is implemented in STL heap?

middle heap

close heap

max heap

min heap

16 / 50

Which of the following is correct about tuple_size?

Returns the maximum sized type element

Returns the sum of non-string values

Returns the number of elements in a tuple

Returns the total number of bits used by the tuple

17 / 50

What is the use of is_heap_until() function?

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

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

Returns the iterator of the first element of the sequence

Returns the iterator of the last element of the sequence always

18 / 50

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

To delete an element

To access an element of a tuple

To print an element of a tuple

To check whether the element of the tuple is empty

19 / 50

What is the full form of vptr?

Virtual Pointer

Vector Pointer

Virtual-vector Pointer

V type Pointer

20 / 50

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

21 / 50

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

To check if a variable is 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 two variable is of array type or not

22 / 50

What is vptr?

A pointer in a class that points to other class

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

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

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

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

is_heap_until()

is_heap()

sort_heap()

check_heap()

24 / 50

What are Distributions in C++?

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

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

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

25 / 50

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

<tuple>

<array>

<stl>

26 / 50

1. What is random_device?

Time-dependent random number generator

A pseudo-random number generator

A true random number generator

Simple random number generator

27 / 50

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

make_heap()

start_heap()

construct_heap()

create_heap()

28 / 50

What is the use of reset() function?

Used to empty any container value

Used to check the type of any variable

Used to destroys the contained object in any variable

Used to change the object any container is holding

29 / 50

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

To sort the second half of the heap

To sort the elements in the heap into ascending order

To sort the elements in the heap into descending order

To sort the first half of the heap

30 / 50

vptr is _______________

used to resolve self-references

a real pointer

like this pointer of class

passed as a parameter to all functions of class

31 / 50

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

Removes the first dimension from the right of the array

Removes the all dimension from an array

Removes the first dimension from the left of the array

Removes the last dimension from the left of the array

32 / 50

What are Engine Adaptors?

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

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

33 / 50

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

<type_traits>

<array>

std namespace

34 / 50

Which classes can have vtable?

Classes having virtual functions

Classes having friend functions

Classes having static functions

All classes have a vtable

35 / 50

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

Returns the last element of the heap

Returns the element closest to mean of a sequence

Returns the first element of the heap

Returns the element closest to the median of a sequence

36 / 50

What is the default random engine?

Random number engine that generates true random numbers

Mersenne Twister 19937 generator generating 32-bit true random number

Mersenne Twister 19937 generator generating 32-bit pseudo random number

Random number engine that generates pseudo-random numbers

37 / 50

Which of the following is correct about tuples?

A tuple can hold more than one element

Elements of tuples are initialized in order

A tuple can hold elements having different types

All of the mentioned

38 / 50

What is Pseudo-random number engines?

Uses user input for random number generation

Uses initial seed based algorithm to generate random numbers

Random number generates depends on the program

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

39 / 50

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

all of the mentioned

min()

max()

operator()

40 / 50

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

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

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

41 / 50

Elements in STL heap are removed in ________________________

increasing order

decreasing order

input order

alternate i.e. once max element then min element

42 / 50

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

tuple <type1, type2, type3> tp;

tuple tp<type1, type2, type3>;

Tuple <type1, type2, type3> tp;

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

43 / 50

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

Removes the first dimension from the left of the array

Removes the first dimension from the right of the array

Removes the given dimension from an array

Removes the last dimension from the left of the array

44 / 50

How many Pseudo-random number engines are there?

45 / 50

Which header file is used for generating random numbers?

<gen_dist>

46 / 50

Which of the following is correct about swap()?

Swaps first element of both tuples

Swaps two tuples

Swaps elements of a tuple alternatively

Swaps last elements of two tuples

47 / 50

What is vtable in C++?

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

Lookup table to resolve function calls in static manners

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

Lookup table to resolve function calls in dynamic manners

48 / 50

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

<heap>

<map>

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

Used to return the type information about the any container

Used to destroys the contained object in any variable

Used to check whether any container is empty or not

Used to change the object any container is holding

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