Class Hierarchies, Library & Containers Quiz 1

1 / 50

Pick out parameter for rehash method in unordered_set in c++?

size

type

count

hash

2 / 50

How can object be allocated outside the object lifetime?

int

void*

float

char$

3 / 50

What is meant by standard c++ library?

It is a header file

It is the collection of class definitions for standard data structures and a collection of algorithms

Step by step process

Collection of algorithms

4 / 50

What is the Run-Time Type Information?

Information about the given block

Information about the variables

Information about an object?s data type at runtime

Information about the functions

5 / 50

Which symbol is used to create multiple inheritances?

Dot

Dollar

Comma

star

6 / 50

What is the order of Destructors call when the object of derived class B is declared, provided class B is derived from class A?

Destructor of B followed by A

Destructor of A only

Destructor of A followed by B

Destructor of B only

7 / 50

Which operators are used in the free store?

delete

new

terminate

both new & delete

8 / 50

What does the cerr represent?

Standard logging stream

Input stream

Output stream

Standard error stream

9 / 50

What will happen when introduce the interface of classes in a run-time polymorphic hierarchy?

Separation of interface from implementation

Merging of interface from implementation

Separation of interface from debugging

Merging of interface from debugging

10 / 50

What are the things are inherited from the base class?

Constructor and its destructor

Friends

Operator=() members

All of the mentioned

11 / 50

What is the operation for .*?

It combines the first operand and the second operand

It reduces the data size

It combines the first operand and the second operand and terminates third operand

It separates the first operand and the second operand

12 / 50

Which classes are called as mixin?

Represent a priary design

Standard logging stream

Represent a secondary design

Classes express functionality which represents responsibilities

13 / 50

Which operator is used in pointer to member function?

->*

Both .* & ->*

14 / 50

What is a virtual function in C++?

All the members that are accessing base class data members

All the functions which are declared in the base class and is re-defined/overridden by the derived class

Any member function of a class

All functions that are derived from the base class

15 / 50

The concept of deciding which function to invoke during runtime is called ______________________

static binding

dynamic linkage

both late binding and dynamic linkage

late binding

16 / 50

Which operator is used to create the user-defined streams in c++?

Both >> & <<

17 / 50

Members of which access specifiers are not inherited?

Private

Public

Protected

None of the mentioned

18 / 50

Pick out the wrong header file about strings.

<regex>

<ios>

<reg>

19 / 50

How many specifiers are used to derive a class?

20 / 50

Pick the correct statement.

Virtual function cannot be applied in Multiple Inheritance classes

Virtual function does early binding

Virtual function can have different names in the base and derived class

Virtual function are different in definitions only

21 / 50

What must be an operand of operator delete?

Array

Stack

Queue

Pointer

22 / 50

Which concept of OOPs is shown by Virtual Functions?

Abstraction

Polymorphism

Inheritance

Encapsulation

23 / 50

Which access specifier is used where one wants data members to be accessed by other classes but not from outside objects?

private

public

both protected and public

protected

24 / 50

What is meant by multiple inheritance?

Deriving a derived class from more than one base class

Deriving a base class from derived class

Deriving a derived class from base class

Deriving a derived base class

25 / 50

Which statement is incorrect about virtual function.

They are used to achieve runtime polymorphism

All of the mentioned

Each virtual function declaration starts with the virtual keyword

They are used to hide objects

26 / 50

Which of the following describes the protected access specifier?

The variable is not visible to its block

The variable is visible to its block and to it?s derived class

The variable is visible everywhere

The variable is visible only outside inside the block

27 / 50

What is meant by type_info?

Used to hold the type information returned by the typeid operator

Used to hold the type information returned by the static_cast

Used to hold the type information returned by the dynamic_cast

Used to hold the type information returned by the static_id

28 / 50

Which is best for coding the standard library for c++?

complex objects are returned by value

have a member-swap()

no trailing underscores on names

all of the mentioned

29 / 50

Which is used to allocate and deallocate storage for objects during the execution?

Freestore

Stack

Queue

Heap

30 / 50

At which time does the static_cast can be applied?

Runtime deconstruct

Compile-time construct

Runtime construct

Both Compile-time & Runtime construct

31 / 50

Which is the correct syntax of declaring a virtual function?

virtual int func();

virtual int func(){};

inline virtual func();

inline virtual func(){};

32 / 50

What is meant by vector in the container library contains?

It is a sequence container that encapsulates static size arrays

It is a sequence container that encapsulates dynamic size arrays

It manages the length and size

It manages the memory

33 / 50

How many types of guarantees are there in exception class can have?

34 / 50

Which specifier makes all the data members and functions of base class inaccessible by the derived class?

public

both private and protected

protected

private

35 / 50

Which design patterns benefit from the multiple inheritances?

Glue pattern

Adapter and observer pattern

Star pattern

Code pattern

36 / 50

What should be used to point to a static class member?

Dynamic pointer

Smart pointer

Normal pointer

Static pointer

37 / 50

To which type of class, We can apply RTTI?

Polymorphic

Encapsulation

Static

Derived

38 / 50

Which is referred by pointers to member?

Non-static members of class objects

Dynamic members of class objects

Referring to whole class

Static members of class objects

39 / 50

What is the order of Constructors call when the object of derived class B is declared, provided class B is derived from class A?

Constructor of A followed by B

Constructor of A only

Constructor of B followed by A

Constructor of B only

40 / 50

What is Inheritance in C++?

Wrapping of data into a single class

Overloading of classes

Classes with same names

Deriving new classes from existing classes

41 / 50

To which of the following access specifiers are applicable?

Both Member data & Functions

Functions

Member data

Protected members

42 / 50

If a class is derived privately from a base class then ______________________________

all members are accessible by the derived class

all the members are inherited by the class but are hidden and cannot be accessible

no derivation of the class gives an error

no members of the base class is inherited

43 / 50

What is the use of clog?

Input stream

Error stream

Standard logging stream

output stream

44 / 50

Which is the best design choice for using pointer to member function?

Class

Interface

Block

Structure

45 / 50

What is a pure virtual function?

Any function that is made virtual

A virtual function defined inside the base class

A virtual function that is defined inside the derived class

A virtual function that has no definition relative to the base class

46 / 50

Which of the following advantages we lose by using multiple inheritances?

Constructor

Both Dynamic binding & Polymorphism

Polymorphism

Dynamic binding

47 / 50

Pick out the wrong header file.

48 / 50

What is the importance of mutable keyword?

It allows the data member to change outside a const member function

It will copy the values of the variable

It will not allow the data member to change within a const member function

It allows the data member to change within a const member function

49 / 50

Which operators are part of RTTI?

both dynamic_cast<> & typeid

dynamic_cast()

typeid

dynamic_cast[]

50 / 50

What type of class member is operator new?

static

smart

const

dynamic

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