C++ Level 1

Welcome to your C++ Level 1

You have to complete this quiz of 30 questions.
After successful submission, you will receive the results at your registered email address below. For further queries, you can contact us through our Contact Us Page.

Thank you.

Name

Email

Phone

Qualification

1.

Which of the following user-defined header file extension used in c++?

hf

cpp

h

hg

2.

By default, all the files in C++ are opened in _________ mode.

Text

ISCII

VTC

Binary

3.

Who invented C++?

Dennis Ritchie

Ken Thompson

Bjarne Stroustrup

Brian Kernighan

4.

What will be the output of the following C++ code?

#include
using namespace std;
int main()
{
char c = 74;
cout << c;
return 0;
}

N

A

I

J

5.

What is the value of p in the following C++ code snippet?

#include
using namespace std;
int main()
{
int p;
bool a = true;
bool b = false;
int x = 10;
int y = 5;
p = ((x | y) + (a + b));
cout << p;
return 0;
}

16

2

0

12

6.

What is the use of the indentation in c++?

r distinguishes between comments and inner data

distinguishes between comments and outer data

r distinguishes between comments and outer data

distinguishes between comments and code

7.

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

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

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

delete is a keyword whereas delete[] is an identifier

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

8.

What is the size of wchar_t in C++?

2

2 or 4

4

Based on the number of bits in the system

9.

What happens if the following C++ statement is compiled and executed?

int *ptr = NULL;
delete ptr;

The program gives a compile-time error

The program compiled successfully but throws an error during run-time

The program is compiled and executed successfully

The program is not semantically correct

10.

Which of the following is used for comments in C++?

// comment */

/* comment */

// comment

both // comment or /* comment */

11.

Which of the following correctly declares an array in C++?

int array;

int array[10];

array array[10];

array{10};

12.

What will be the output of the following C++ code?

#include

using namespace std;

int main ()

{

int cin;

cin >> cin;

cout << "cin: " << cin;

return 0;

}

Segmentation fault

Nothing is printed

Error

cin: garbage value

13.

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

float

bool

int

double

14.

What will be the output of the following C++ code?

#include
#include
using namespace std;

int main(int argc, char const *argv[])

{

char s1[6] = "Hello";

char s2[6] = "World";

char s3[12] = s1 + " " + s2;

cout<<s3;

return 0;

}

Error

World

Hello World

Hello

15.

Which of the following is used to terminate the function declaration in C++?

;

)

:

]

16.

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

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

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 the functions of a class

17.

Which of the following C++ code will give error on compilation?

================code 1=================

#include

using namespace std;

int main(int argc, char const *argv[])

{

cout<<"Hello World";

return 0;

}

========================================

================code 2=================

#include

int main(int argc, char const *argv[])

{

std::cout<<"Hello World";

return 0;

}

========================================

Code 1 only

Neither code 1 nor code 2

Both code 1 and code 2

Code 2 only

18.

What is C++?

C++ is an object oriented programming language

C++ is a procedural programming language

C++ is a functional programming language

C++ supports both procedural and object oriented programming language

19.

What happens if the following program is executed in C and C++?

#include

void func(void)

{

printf("Hello");

}

void main()

{

func();

func(2);

}

Error in C++ and successful execution in C

Outputs Hello twice in both C and C++

Error in both C and C++

Error in C and successful execution in C++

20.

What will be the output of the following C++ function?

int main()
{
register int i = 1;
int *ptr = &i;
cout << *ptr;
return 0;
}

0

Compiler error may be possible

Runtime error may be possible

1

21.

Which is more effective while calling the C++ functions?

call by pointer

call by reference

call by value

call by object

22.

What will be the output of the following C++ program?

#include
#include
using namespace std;
int main()
{
cout << setprecision(17);
double d = 0.1;
cout << d << endl;
return 0;
}

0.10000000000000001

compile time error

0.11

0.100001

23.

Which of the following is not a type of Constructor in C++?

Parameterized constructor

Default constructor

Friend constructor

Copy constructor

24.

What is virtual inheritance in C++?

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

C++ technique to enhance multiple inheritance

C++ technique to avoid multiple inheritances of classes

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

25.

Which of the following is a correct identifier in C++?

7var_name

$var_name

7VARNAME

VAR_1234

26.

What will be the output of the following C++ code?

#include
#include
#include
using namespace std;
int main()
{
string s = "spaces in text";
s.erase(remove(s.begin(), s.end(), ' ' ), s.end() ) ;
cout << s << endl;
}

spaces in

spaces

spacesintext

spaces in text

27.

What happens if the following program is executed in C and C++?

#include

int main(void)

{
int new = 5;
printf("%d", new);
}

A successful run in both C and C++

Error in C and successful execution in C++

Error in C++ and successful execution in C

Error in both C and C++

28.

Which of the following approach is used by C++?

Top-down

Left-right

Right-left

Bottom-up

29.

What will be the output of the following C++ program?

#include

using namespace std;

int main(int argc, char const *argv[])

{

const char *a = "Hello\0World";

cout<<a;

return 0;

}

World

Hello World

Hello

Error

Talk to our Industry Experts for Career Counselling

Company

Platform

Resources

Get in touch