Class Hierarchies, Library & Containers Quiz 1

1 / 50

How many specifiers are used to derive a class?

2 / 50

What must be an operand of operator delete?

Queue

Array

Stack

Pointer

3 / 50

Which design patterns benefit from the multiple inheritances?

Star pattern

Code pattern

Glue pattern

Adapter and observer pattern

4 / 50

Members of which access specifiers are not inherited?

Protected

None of the mentioned

Private

Public

5 / 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 debugging

Merging of interface from implementation

Separation of interface from debugging

6 / 50

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

7 / 50

Pick out the wrong header file about strings.

<regex>

<ios>

<reg>

8 / 50

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

Both >> & <<

9 / 50

To which type of class, We can apply RTTI?

Static

Encapsulation

Polymorphic

Derived

10 / 50

Which of the following describes the protected access specifier?

The variable is visible only outside inside the block

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

11 / 50

What type of class member is operator new?

static

const

dynamic

smart

12 / 50

Which classes are called as mixin?

Represent a secondary design

Represent a priary design

Standard logging stream

Classes express functionality which represents responsibilities

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 followed by B

Constructor of B followed by A

Constructor of A only

Constructor of B only

14 / 50

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

Structure

Interface

Class

Block

15 / 50

What is meant by vector in the container library contains?

It is a sequence container that encapsulates static size arrays

It manages the memory

It manages the length and size

It is a sequence container that encapsulates dynamic size arrays

16 / 50

Pick the correct statement.

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

Virtual function are different in definitions only

Virtual function does early binding

Virtual function cannot be applied in Multiple Inheritance classes

17 / 50

What does the cerr represent?

Standard error stream

Input stream

Standard logging stream

Output stream

18 / 50

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

public

protected

both protected and public

private

19 / 50

What is the importance of mutable keyword?

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

20 / 50

Which operators are used in the free store?

both new & delete

terminate

new

delete

21 / 50

Pick out the wrong header file.

22 / 50

Which concept of OOPs is shown by Virtual Functions?

Abstraction

Inheritance

Encapsulation

Polymorphism

23 / 50

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

protected

public

private

both private and protected

24 / 50

Which operator is used in pointer to member function?

Both .* & ->*

->*

25 / 50

Which statement is incorrect about virtual function.

All of the mentioned

Each virtual function declaration starts with the virtual keyword

They are used to hide objects

They are used to achieve runtime polymorphism

26 / 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

27 / 50

How can object be allocated outside the object lifetime?

int

char$

float

void*

28 / 50

What is the use of clog?

output stream

Standard logging stream

Input stream

Error stream

29 / 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

30 / 50

What are the things are inherited from the base class?

All of the mentioned

Friends

Constructor and its destructor

Operator=() members

31 / 50

What is a virtual function in C++?

All functions that are derived from the base class

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

32 / 50

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

hash

count

type

size

33 / 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 followed by B

Destructor of A only

Destructor of B only

Destructor of B followed by A

34 / 50

What is the operation for .*?

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

It combines the first operand and the second operand

It separates the first operand and the second operand

It reduces the data size

35 / 50

What is meant by multiple inheritance?

Deriving a derived class from more than one base class

Deriving a derived base class

Deriving a derived class from base class

Deriving a base class from derived class

36 / 50

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

Dynamic pointer

Static pointer

Normal pointer

Smart pointer

37 / 50

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

late binding

both late binding and dynamic linkage

dynamic linkage

static binding

38 / 50

What is Inheritance in C++?

Classes with same names

Deriving new classes from existing classes

Overloading of classes

Wrapping of data into a single class

39 / 50

At which time does the static_cast can be applied?

Runtime deconstruct

Runtime construct

Both Compile-time & Runtime construct

Compile-time construct

40 / 50

What is meant by standard c++ library?

Collection of algorithms

Step by step process

It is a header file

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

41 / 50

To which of the following access specifiers are applicable?

Protected members

Both Member data & Functions

Functions

Member data

42 / 50

Which operators are part of RTTI?

both dynamic_cast<> & typeid

dynamic_cast[]

dynamic_cast()

typeid

43 / 50

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

Heap

Queue

Freestore

Stack

44 / 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

45 / 50

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

all members are accessible by the derived class

no derivation of the class gives an error

no members of the base class is inherited

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

46 / 50

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

Polymorphism

Dynamic binding

Both Dynamic binding & Polymorphism

Constructor

47 / 50

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

have a member-swap()

no trailing underscores on names

all of the mentioned

complex objects are returned by value

48 / 50

What is the Run-Time Type Information?

Information about the functions

Information about the given block

Information about the variables

Information about an object?s data type at runtime

49 / 50

Which is the correct syntax of declaring a virtual function?

inline virtual func(){};

virtual int func(){};

virtual int func();

inline virtual func();

50 / 50

Which symbol is used to create multiple inheritances?

star

Comma

Dot

Dollar

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