Basics Concepts of C++ Quiz 2

1 / 37

Which of the following is an entry-controlled loop?

both while and for

do-while

for

while

2 / 37

Which of the following is correct about new and malloc?

Pointer object initialization of a class using malloc involves constructor call whereas using new does not involve constructor call

Pointer object initialization of a class using new involves constructor call whereas using malloc does not involve constructor call

Pointer object initialization of a class with both new and malloc calls the constructor of that class

Both are available in C

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Which of the following feature is not provided by C?

References

Structures

Pointers

Functions

4 / 37

Which of the following is correct?

struct is not required in C++ but required in C while declaring an object of the structure

struct tag is not required in both C and C++ while declaring an object of the structure

struct tag is required in both C and C++ while declaring an object of the structure

struct is not required in C but required in C++ while declaring an object of the structure

5 / 37

Which of the following is the correct difference between cin and scanf()?

cin is used for printing whereas scanf() is used for reading input

cin is a stream object whereas scanf() is a function

scanf() is a stream object whereas cin is a function

both are the same

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Which of the following is accessed by a member function of a class?

All members of a class

The private part of a class

The public part of a class

The object of that class

7 / 37

Which of the following is C++ equivalent for printf()?

cout

input

cin

8 / 37

Which of the following is not a fundamental type is not present in C but present in C++?

int

void

float

bool

9 / 37

How many types of polymorphism are there?

10 / 37

What is the size of a character type in C and C++?

1 and 1

1 and 4

4 and 4

4 and 1

11 / 37

1. What is name mangling in C++?

The process of making common names for all the function of C++ program for better use

The process of changing the names of variable

The process of adding more information to a function name so that it can be distinguished from other functions by the compiler

The process of declaring variables of different types

12 / 37

What is virtual inheritance?

C++ technique to enhance multiple inheritance

C++ technique to avoid multiple inheritances of classes

C++ technique to avoid multiple copies of the base class into children/derived class

C++ technique to ensure that a private member of the base class can be accessed somehow

13 / 37

Which of the following is correct about this pointer in C++?

this pointer is passed as a hidden argument in all the functions of a class

this pointer is passed as a hidden argument in all static variables of a class

this pointer is passed as a hidden argument in all static functions of a class

this pointer is passed as a hidden argument in all non-static functions of a class

14 / 37

Which of the following operator is used with this pointer to access members of a class?

15 / 37

What is std in C++?

std is a standard file reading header in C++

std is a standard header file in C++

std is a standard namespace in C++

std is a standard class in C++

16 / 37

Which of the following is correct about static polymorphism?

In static polymorphism, the conflict between the function call is resolved only if it required

In static polymorphism, the conflict between the function call is resolved during the compile time

In static polymorphism, the conflict between the function call is never resolved during the execution of a program

In static polymorphism, the conflict between the function call is resolved during the run time

17 / 37

Which of the following is an exit-controlled loop?

all of the mentioned

for

do-while

while

18 / 37

Which of the following statement is correct?

C allows constructor definition while C++ does not

Structure in C allows Constructor definition

Structure in C++ allows Constructor definition

Both allow Constructor definition

19 / 37

What is the difference between delete and delete[] in C++?

delete is syntactically correct but delete[] is wrong and hence will give an error if used in any case

delete is used to delete normal objects whereas delete[] is used to pointer objects

delete is used to delete single object whereas delete[] is used to multiple(array/pointer of) objects

delete is a keyword whereas delete[] is an identifier

20 / 37

What is static binding?

All of the mentioned

The process of linking the actual code with a procedural call during compile-time

The process of linking the actual code with a procedural call at any-time

The process of linking the actual code with a procedural call during run-time

21 / 37

Which of the following is correct?

A class is an instance of its objects

An object is an instance of the data type of the class

A class is an instance of the data type that the class have

An object is an instance of its class

22 / 37

Which of the following is correct about dynamic polymorphism?

In dynamic polymorphism, the conflict between the function call is resolved at the beginning of the program

In dynamic polymorphism, the conflict between the function call is resolved during the run time

In dynamic polymorphism, the conflict between the function call is resolved during the compile time

In dynamic polymorphism, the conflict between the function call is never resolved during the execution of the program

23 / 37

What if we define the below structure in C and C++?

Error in both C and C++

No error in both C and C++

Error in C but not in C++

Error in C++ but not in C

24 / 37

What is the size of a boolean variable in C++?

1 bit

4 bytes

1 byte

2 bytes

25 / 37

What is dynamic binding?

All of the mentioned

The process of linking the actual code with a procedural call during compile-time

The process of linking the actual code with a procedural call during run-time

The process of linking the actual code with a procedural call at any-time

26 / 37

Which of the following is correct?

struct cannot have member function in C but it can in C++

struct cannot have member function in C++ but it can in C

struct can have member function in both C and C++

struct cannot have member function in both C and C++

27 / 37

Which of the following is the scope resolution operator?

28 / 37

Which of the following syntax can be used to use a member of a namespace without including that namespace?

namespace->member

namespace::member

namespace.member

namespace~member

29 / 37

What is the correct syntax of declaring array of pointers of integers of size 10 in C++?

int *arr = new int*[10];

int *arr = new int[10];

int arr = new int[10];

int **arr = new int*[10];

30 / 37

Which of the following syntax for declaring a variable of struct STRUCT can be used in both C and C++?

Both struct STRUCT S; and STRUCT S;

STRUCT S;

Both C and C++ have different syntax

struct STRUCT S;

31 / 37

What is the other name of compile-time polymorphism?

Executing polymorphism

Non-executing polymorphism

Dynamic polymorphism

Static polymorphism

32 / 37

What is the size of a character literal in C and C++?

1 and 4

4 and 4

4 and 1

1 and 1

33 / 37

Which of the following is C++ equivalent for scanf()?

cin

input

cout

34 / 37

Why this pointer is used?

To access the members of a class which have the same name as local variables in that scope

To access objects of other class

To access objects of other variables

To access all the data stored under that class

35 / 37

Which of the following type is provided by C++ but not C?

float

int

double

bool

36 / 37

Which of the following operator has left to right associativity?

Logical not

addressof

Unary operator

Array element access

37 / 37

What is the other name of run-time polymorphism?

Dynamic polymorphism

Static polymorphism

Executing polymorphism

Non-executing polymorphism

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