Algorithms, Objects & Iterators in C++ Quiz 2

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What is the correct syntax for declaring an allocator?

template class allocator;

template class()

template < class T > class allocator;

template < class T > class;

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Which of the following can serve as random-access iterator?

Class pointer

Object pointer

Memory & Class pointer

Memory pointer

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Which header file is used to manipulate the allocater?

object

allocater

iterator

memory

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Where are allocators implemented?

Standard library

String library

Template library

C++ code library

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What are Random-access Iterators?

Input iterator with the additional property of random access

Iterators that can be used to access elements at an arbitrary offset position

Same as Bi-directional iterator

Output iterator with the additional property of random access

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Which operator is used to allocate the memory?

new

free

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In which type of semantics does c++ implements iterator?

Memory

Pointer

Value

Size

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How many types of sequence operations are provided by the C++ algorithm STL?

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What are functors in C++?

Objects of a class which are treated as functions

Functions that are called only once in a program

Objects that are used to call the function of other classes

Functions that are called using pointer objects

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Which of the following is a logical unary functor?

logical_not<T> f;

logical_or<T> f;

negate<T> f;

logical_and<T> f;

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What kind of errors do checked iterators detect?

Initialized iterators

Range access

Both Uninitialized iterators and range access

Uninitialized iterators

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

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How many ways are there to use functors?

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What kind of pattern is iterator pattern?

Adapter pattern

Design pattern

Sequence pattern

Star pattern

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How many parameters are required for sort_heap function?

2 or 3

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Which of the header file is used to implement algorithms provided by C++ STL?

<algos>

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Which function can be used to find the sum of a vector container?

calcsum()

accumulate()

checksum()

findsum()

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Which of the following is correct?

Output Iterators are used for assigning

Input Iterators are used for assigning

Both Input and Output Iterators are used for assigning

Both Input and Output Iterators are used for accessing

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What will happen if the iterator is unchecked?

Arising of compiler warnings

Arising of compiler warnings & Unchecked behavior on program

Unchecked behavior on program

Nothing will execute

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Which of the following is a Non-modifying Sequence Operation?

remove()

search()

transform()

swap()

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Which of the following operators are overloaded for functors?

()

[]

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What are unary functors?

Functors that accepts two parameters

Functors that accepts more than one parameters

Functors that accepts other than a specific type of parameter

Functors that accepts only one parameter

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What is the correct function prototype of () operator overloading?

return_type operator(arguments)();

return_type operator(Class_name)(arguments);

return_type operator()(arguments);

return_type operator(arguments);

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Which operator is used to deallocate the memory?

free

insert

empty

destroy

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Which function is used increment the iterator by a particular value?

advance()

next()

move()

prev()

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Which of the following is an advantage of Forward iterator over input and output iterator?

Can be used with relational operators also

Can be used as both accessing and assigning iterator

Can be used with arithmetic operators also

Forward iterator can be incremented or decremented

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What is the use of checked iterators?

Overwrite the bounds of your container

It will check the list value

Not allow you to overwrite the bounds of your container

Overwrite the bounds of your iterators

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What are Iterators?

STL component used to point a memory address of a container

STL component used for vectors

STL component used to call functions efficiently

STL component used to define template classes

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How many types of Iterators are there?

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Which of the following is an arithmetic unary functor?

logical_not<T> f;

negate<T> f;

logical_or<T> f;

logical_and<T> f;

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Which of te following is a built-in example of functors in C++?

add<T> f(a1, a2);

subtract<T> f(a1, a2);

plus<T> f(a1, a2);

mltiplication<T> f(a1, a2);

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What is the use of random_shuffle() function of STL algorithm?

To select any random number from the given sequence.

To generate the random sequence in a range

To rearrange given sequence randomly

To generate a sequence in a given range and arrange them in random order

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Which of the following is a Modifying Sequence Operation?

any_of()

swap()

all_of()

equal()

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Which of the following is correct about Functors?

Functors should be declared global

Functors have a state

Functors should not be declared outside the main function

Overloaded operator () function is not a member of the class

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What are binary functors?

Functors that accepts more than one parameters

Functors that accepts other than a specific type of parameter

Functors that accepts only one parameter

Functors that accepts two parameters

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What is the use of includes function in c++?

Includes a new element in the end

Compares two sorted ranges of data

Includes a new element in the range

Compares two ranges of data

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Pick the correct statement.

Input iterator moves sequentially forward

Input iterator moves sequentially downwards

Input iterator moves in both direction

Input iterator moves sequentially backward

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Which of the following is correct about Input Iterators?

All of the mentioned

They cannot be decremented

Cannot be used in multi-pass algorithms

Can only be incremented

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1. What is the property of partial sort function provided by the STL algorithm?

sorts the elements after the middle element in descending order and remaining elements are left without any specific order

sorts the elements after the middle element in ascending order and remaining elements are left without any specific order

sorts the elements before the middle element in descending order and remaining elements are left without any specific order

sorts the elements before the middle element in ascending order and remaining elements are left without any specific order

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What is the use of reference member type in allocator?

Quantities of element

Reference to an element

Sequence of an element

Point to an element

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What does the checked iterator allow you to find?

Warnings & Run time error

Run time error

Warnings

Compile time error

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Which of the following header file is required to use in-bulit functors of C++?

<any>

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How many categories of iterators are there in c++?

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Which of the following is correct about Input Iterators?

Input iterators can be used with all relational operators

Input iterators can work with arithmetic operators

Input iterators can work with sequence operators

No value can be assigned to the location pointed by Input Iterator

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How many adaptors support the checked iterators?

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What is the property of stable sort function provided by the STL algorithm?

arranges the sequence randomly preserving the relative order of equivalent elements

sorts the elements of a sequence in descending order preserving the relative order of equivalent elements

same as sort function of STL algorithm

sorts the elements of a sequence in ascending order preserving the relative order of equivalent elements

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What are Bi-directional iterators?

Forward Iterator that can be used in both directions

Iterator same as Forward Iterator

Iterator that can only be used to access the sequence from both sides

Iterator that can only be used to assign the sequence from both sides

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