Class Hierarchies, Library & Containers Quiz 1

1 / 50

What is meant by multiple inheritance?

Deriving a derived base class

Deriving a base class from derived class

Deriving a derived class from base class

Deriving a derived class from more than one base class

2 / 50

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

Interface

Structure

Class

Block

3 / 50

Which classes are called as mixin?

Standard logging stream

Classes express functionality which represents responsibilities

Represent a priary design

Represent a secondary design

4 / 50

To which type of class, We can apply RTTI?

Derived

Polymorphic

Static

Encapsulation

5 / 50

Which operators are used in the free store?

both new & delete

delete

terminate

new

6 / 50

How can object be allocated outside the object lifetime?

char$

void*

float

int

7 / 50

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

dynamic linkage

static binding

late binding

both late binding and dynamic linkage

8 / 50

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

Normal pointer

Static pointer

Smart pointer

Dynamic pointer

9 / 50

Pick out the wrong header file about strings.

<reg>

<ios>

<regex>

10 / 50

Which is the correct syntax of declaring a virtual function?

virtual int func();

inline virtual func(){};

virtual int func(){};

inline virtual func();

11 / 50

What is meant by vector in the container library contains?

It manages the length and size

It manages the memory

It is a sequence container that encapsulates dynamic size arrays

It is a sequence container that encapsulates static size arrays

12 / 50

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

Both >> & <<

13 / 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 only

Constructor of B only

Constructor of B followed by A

Constructor of A followed by B

14 / 50

At which time does the static_cast can be applied?

Runtime deconstruct

Both Compile-time & Runtime construct

Runtime construct

Compile-time construct

15 / 50

What must be an operand of operator delete?

Pointer

Queue

Stack

Array

16 / 50

What are the things are inherited from the base class?

Constructor and its destructor

All of the mentioned

Friends

Operator=() members

17 / 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

18 / 50

What is the use of clog?

output stream

Error stream

Standard logging stream

Input stream

19 / 50

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

have a member-swap()

no trailing underscores on names

complex objects are returned by value

all of the mentioned

20 / 50

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

21 / 50

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

Polymorphism

Dynamic binding

Both Dynamic binding & Polymorphism

Constructor

22 / 50

Which of the following describes the protected access specifier?

The variable is visible everywhere

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 only outside inside the block

23 / 50

What is meant by type_info?

Used to hold the type information returned by the dynamic_cast

Used to hold the type information returned by the static_id

Used to hold the type information returned by the static_cast

Used to hold the type information returned by the typeid operator

24 / 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

25 / 50

Members of which access specifiers are not inherited?

None of the mentioned

Public

Protected

Private

26 / 50

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

Stack

Freestore

Heap

Queue

27 / 50

How many specifiers are used to derive a class?

28 / 50

Pick out the wrong header file.

29 / 50

Which operator is used in pointer to member function?

Both .* & ->*

->*

30 / 50

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

size

hash

count

type

31 / 50

What is meant by standard c++ library?

It is a header file

Step by step process

Collection of algorithms

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

32 / 50

Which symbol is used to create multiple inheritances?

Dollar

Comma

star

Dot

33 / 50

What is a virtual function in C++?

Any member function of a class

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

All the members that are accessing base class data members

All functions that are derived from the base class

34 / 50

Which operators are part of RTTI?

dynamic_cast[]

typeid

both dynamic_cast<> & typeid

dynamic_cast()

35 / 50

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

Separation of interface from debugging

Merging of interface from debugging

Merging of interface from implementation

Separation of interface from implementation

36 / 50

What is the operation for .*?

It combines the first operand and the second operand

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

It reduces the data size

It separates the first operand and the second operand

37 / 50

What is Inheritance in C++?

Overloading of classes

Deriving new classes from existing classes

Wrapping of data into a single class

Classes with same names

38 / 50

What does the cerr represent?

Input stream

Output stream

Standard logging stream

Standard error stream

39 / 50

What is a pure virtual function?

Any function that is made virtual

A virtual function that is defined inside the derived class

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

A virtual function defined inside the base class

40 / 50

Which statement is incorrect about virtual function.

They are used to achieve runtime polymorphism

Each virtual function declaration starts with the virtual keyword

They are used to hide objects

All of the mentioned

41 / 50

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

both protected and public

public

private

protected

42 / 50

What is the Run-Time Type Information?

Information about the given block

Information about an object?s data type at runtime

Information about the variables

Information about the functions

43 / 50

To which of the following access specifiers are applicable?

Functions

Protected members

Member data

Both Member data & Functions

44 / 50

Which design patterns benefit from the multiple inheritances?

Glue pattern

Code pattern

Adapter and observer pattern

Star pattern

45 / 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 A only

Destructor of B only

Destructor of A followed by B

Destructor of B followed by A

46 / 50

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

both private and protected

protected

public

private

47 / 50

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

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

all members are accessible by the derived class

48 / 50

What is the importance of mutable keyword?

It will copy the values of the variable

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

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

What type of class member is operator new?

const

dynamic

smart

static

50 / 50

Which concept of OOPs is shown by Virtual Functions?

Polymorphism

Encapsulation

Abstraction

Inheritance

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