Demo | MyPerfectice

Q1:

Which method do we use to append more than one character at a time?

Tags:

Section:

Core Programming

Options:

append

operator+=

data

both append & operator+=

Q2:

Choose the correct option.
extern int i;
int i;

Tags:

Section:

Core Programming

Options:

both 1 and 2 declare i

1 declares the variable i and 2 defines i

1 declares and defines i, 2 declares i

1 declares i,2 declares and defines i

Q3:

Pick the right option for following statements.
1) A definition is also a declaration.
2) An identifier can be declared just once.

Tags:

Section:

Core Programming

Options:

Statement 1 is true, Statement 2 is false

Statement 2 is true, Statement 1 is false

Both are false

Both are true

Q4:

What is the use of Namespace?

Tags:

Section:

Core Programming

Options:

To encapsulate the data

To structure a program into logical units

Encapsulate the data & structure a program into logical units

None of the mentioned

Q5:

What is the general syntax for accessing the namespace variable?

Tags:

Section:

Core Programming

Options:

namespaceid::operator

namespace,operator

namespace#operator

none of the mentioned

Q6:

Variable names beginning with underscore is not encouraged. Why?

Tags:

Section:

Core Programming

Options:

It is not standardized

To avoid conflicts since assemblers and loaders use such names

To avoid conflicts since library routines use such names

To avoid conflicts with environment variables of an operating system

Q7:

Variable name resolving (number of significant characters for uniqueness of variable) depends on

Tags:

Section:

Core Programming

Options:

Compiler and linker implementations

Assemblers and loaders implementations

C language

None of these

Q8:

Which of the following is not a valid C variable name?

Tags:

Section:

Core Programming

Options:

int number;

float rate;

int variable_count;

int $main;

Q9:

Which of the following is not a valid variable name declaration?

Tags:

Section:

Core Programming

Options:

float PI = 3.14;

double PI = 3.14;

int PI = 3.14;

#define PI 3.14

Q10:

Which of the following cannot be a variable name in C?

Tags:

Section:

Core Programming

Options:

volatile

true

friend

export

Q11:

What is the size of an int data type in C++?

Tags:

Section:

Core Programming

Options:

4 Bytes

8 Bytes

Depends on the system/compiler

Cannot be determined

Q12:

Which is correct with respect to size of the datatypes in C/C++?

Tags:

Section:

Core Programming

Options:

char > int > float

int > char > float

char < int < double

double > char > int

Q13:

Result of a logical or relational expression in C is

Tags:

Section:

Core Programming

Options:

True or False

0 or 1

0 if expression is false and any positive number if expression is true

None of these

Q14:

In C/C++, operation “a = a * b + a” can also be written as:

Tags:

Section:

Core Programming

Options:

a *= b + 1;

(c = a * b)!=(a = c + a);

a = (b + 1)* a;

All of the above

Q15:

Which property allows to produce different executables for different platforms in C?

Tags:

Section:

Core Programming

Options:

File inclusion

Selective inclusion

Conditional compilation

Recursive macros

Q16:

C preprocessor is conceptually the first step during compilation?

Tags:

Section:

Core Programming

Options:

True

False

Depends on the standard

Depends on the platform

Q17:

What is the output of this C code?

#include <stdio.h>

#define fun(m, n) m * n = 10

int main()

{

printf("In main\n");

}

Tags:

Section:

Core Programming

Options:

In main

Compilation error

Preprocessor error

None of these

Q18:

#include <somefile.h> are _______ files and #include “somefile.h” ________ files.

Tags:

Section:

Core Programming

Options:

Library, Library

Library, user-created header

User-created header, library

They can include all types of file

Q19:

What is preprocessor?

Tags:

Section:

Core Programming

Options:

That processes its input data to produce output that is used as input to another program

That is nothing but a loader

That links various source files

All of the above

Q20:

What is the advantage of #define?

Tags:

Section:

Core Programming

Options:

Data type is flexible

Can have a pointer

Reduction in the size of the program

None of these

Q21:

Correct syntax to initialize bit-fields in an structure?

Tags:

Section:

Core Programming

Options:

struct temp

{

unsigned int a : 1;

}s;

struct temp

{

unsigned int a = 1;

}s;

struct temp

{

unsigned float a : 1;

}s;

None of these

Q22:

Does puts function adds newline character?

Tags:

Section:

Core Programming

Options:

True

False

Depends on the standard

Undefined behaviour

MCQ Test C/C++: Basic Concepts