Class Hierarchies, Library & Containers Quiz 1

1 / 50

What is meant by type_info?

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

Used to hold the type information returned by the typeid operator

2 / 50

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

Polymorphism

Both Dynamic binding & Polymorphism

Dynamic binding

Constructor

3 / 50

Which symbol is used to create multiple inheritances?

Dollar

Comma

Dot

star

4 / 50

Which operator is used in pointer to member function?

->*

Both .* & ->*

5 / 50

How can object be allocated outside the object lifetime?

char$

void*

int

float

6 / 50

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

Both >> & <<

7 / 50

What does the cerr represent?

Standard logging stream

Output stream

Standard error stream

Input stream

8 / 50

What is Inheritance in C++?

Classes with same names

Deriving new classes from existing classes

Wrapping of data into a single class

Overloading of classes

9 / 50

Which is the correct syntax of declaring a virtual function?

inline virtual func();

virtual int func();

inline virtual func(){};

virtual int func(){};

10 / 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

11 / 50

Pick out the wrong header file about strings.

<ios>

<regex>

<reg>

12 / 50

Which operators are part of RTTI?

dynamic_cast()

both dynamic_cast<> & typeid

typeid

dynamic_cast[]

13 / 50

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

late binding

static binding

dynamic linkage

both late binding and dynamic linkage

14 / 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 implementation

Merging of interface from debugging

Separation of interface from implementation

15 / 50

Which operators are used in the free store?

new

terminate

both new & delete

delete

16 / 50

To which type of class, We can apply RTTI?

Polymorphic

Derived

Static

Encapsulation

17 / 50

At which time does the static_cast can be applied?

Runtime construct

Compile-time construct

Both Compile-time & Runtime construct

Runtime deconstruct

18 / 50

Which design patterns benefit from the multiple inheritances?

Star pattern

Glue pattern

Adapter and observer pattern

Code pattern

19 / 50

What must be an operand of operator delete?

Pointer

Queue

Array

Stack

20 / 50

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

Interface

Class

Structure

Block

21 / 50

What is the importance of mutable keyword?

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

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

22 / 50

What is the operation for .*?

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

It reduces the data size

It combines the first operand and the second operand

It separates the first operand and the second operand

23 / 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 members of the base class is inherited

no derivation of the class gives an error

all members are accessible by the derived class

24 / 50

What are the things are inherited from the base class?

Constructor and its destructor

Operator=() members

Friends

All of the mentioned

25 / 50

Which classes are called as mixin?

Classes express functionality which represents responsibilities

Represent a secondary design

Represent a priary design

Standard logging stream

26 / 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 B only

Constructor of B followed by A

Constructor of A only

Constructor of A followed by B

27 / 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

28 / 50

Members of which access specifiers are not inherited?

None of the mentioned

Private

Public

Protected

29 / 50

Pick the correct statement.

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

Virtual function cannot be applied in Multiple Inheritance classes

Virtual function are different in definitions only

Virtual function does early binding

30 / 50

Which statement is incorrect about virtual function.

All of the mentioned

They are used to achieve runtime polymorphism

Each virtual function declaration starts with the virtual keyword

They are used to hide objects

31 / 50

Which is referred by pointers to member?

Non-static members of class objects

Dynamic members of class objects

Static members of class objects

Referring to whole class

32 / 50

How many specifiers are used to derive a class?

33 / 50

What is meant by multiple inheritance?

Deriving a derived class from base class

Deriving a derived class from more than one base class

Deriving a base class from derived class

Deriving a derived base class

34 / 50

What is the use of clog?

Error stream

Input stream

Standard logging stream

output stream

35 / 50

To which of the following access specifiers are applicable?

Functions

Both Member data & Functions

Protected members

Member data

36 / 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 static size arrays

It is a sequence container that encapsulates dynamic size arrays

37 / 50

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

private

public

both private and protected

protected

38 / 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 A followed by B

Destructor of B followed by A

Destructor of B only

39 / 50

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

count

size

type

hash

40 / 50

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

Heap

Freestore

Stack

Queue

41 / 50

What is a virtual function in C++?

Any member function of a class

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

All functions that are derived from the base class

42 / 50

Pick out the wrong header file.

43 / 50

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

44 / 50

Which concept of OOPs is shown by Virtual Functions?

Inheritance

Polymorphism

Abstraction

Encapsulation

45 / 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 only outside inside the block

The variable is visible everywhere

46 / 50

What is meant by standard c++ library?

Step by step process

Collection of algorithms

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

It is a header file

47 / 50

What type of class member is operator new?

dynamic

const

smart

static

48 / 50

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

Normal pointer

Static pointer

Dynamic pointer

Smart pointer

49 / 50

What is the Run-Time Type Information?

Information about an object?s data type at runtime

Information about the given block

Information about the variables

Information about the functions

50 / 50

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

public

private

both protected and public

protected

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