C++ | WarmConnect

Welcome to your C++ test. Please take this test in one sitting of 25 minutes. You can go back and forth answering questions in any order. Your time begins when you fill in your details below and click on next. Submit the test when the time is up

Name

Phone

What are mandatory parts in the function declaration?

return type, function name

return type, function name, parameters

parameters, function name

parameters, variables

Which of the following is the correct syntax of including a user defined header files in C++?

#include

#include “userdefined”

#include [userdefined]

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

  #include <iostream>
    using namespace std;
    int mult (int x, int y)
    {
        int result;
        result = 0;
        while (y != 0) 
        {
            result = result + x;
            y = y - 1;
        }
        return(result);
    }
    int main ()
    {
        int x = 5, y = 5;
        cout  << mult(x, y) ;
        return(0);
    }

What is the other name used for functions inside a class?

Member variables

Member functions

Class functions

Class variables

When will we use the function overloading?

same function name but different number of arguments

different function name but same number of arguments

same function name but same number of arguments

different function name but different number of arguments

How many types of polymorphism are there in C++?

Which of the following escape sequence represents tab?

\t\r

Which of the following is correct?

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

struct tag is not 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

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

#include <iostream>
    using namespace std;
    int main()
    {
        char *ptr;
        char Str[] = "abcdefg";
        ptr = Str;
        ptr += 5;
        cout << ptr;
        return 0;
    }

cdef

defg

abcd

If the user did not supply the value, what value will it take?

default value

rise an error

both default value & rise an error

error

Which of the following feature is used in function overloading and function with default argument?

Encapsulation

Polymorphism

Abstraction

Modularity

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

#include <iostream>
    using namespace std;
    int max(int a, int b )
    {
        return ( a > b ? a : b );
    }
    int main()
    {
        int i = 5;
        int j = 7;
        cout << max(i, j );
        return 0;
    }

either 5 or 7

Which of the following is called address operator?

Identify the incorrect statement

Reference is the alternate name of the object

A reference value once defined can be reassigned

A reference value once defined cannot be reassigned

Reference is the alternate name of the variable

What is an inline function?

A function that is expanded at each call during execution

A function that is called during compile time

A function that is not checked for syntax errors

A function that is not checked for semantic analysis

Which of the following permits function overloading on c++?

type

number of arguments

type & number of arguments

number of objects

Which concept allows you to reuse the written code?

Encapsulation

Abstraction

Inheritance

Polymorphism

Which is more effective while calling the functions?

call by value

call by reference

call by pointer

call by object

Which function is used to read a single character from the console in C++?

cin.get(ch)

getline(ch)

read(ch)

scanf(ch)

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

================code 1================= 
#include <iostream> 
using namespace std; 
int main(int argc, char const *argv[]) 
{ 
cout<<"Hello World"; 
return 0; 
} 
======================================== 
================code 2================= 
#include <iostream> 
int main(int argc, char const *argv[]) 
{ 
std::cout<<"Hello World"; 
return 0; 
}

Both code 1 and code 2

Neither code 1 nor code 2

Code 2 only

Code 1 only

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

#include <iostream>
    using namespace std;
    int main()
    {
        char arr[20];
        int i;
        for(i = 0; i < 10; i++)
            *(arr + i) = 65 + i;
        *(arr + i) = '\0';
        cout << arr;
        return(0);
    }

ABCDEFGHIJ

AAAAAAAAAA

JJJJJJJJ

AAAAAAJJJJ

What will happen in the following C++ code snippet?

int a = 100, b = 200;
int *p = &a, *q = &b;
p = q;

b is assigned to a

p now points to b

a is assigned to b

q now points to a

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

#include <iostream>
    using namespace std;
    int add(int a, int b);
    int main()
    {
        int i = 5, j = 6;
        cout << add(i, j) << endl;
        return 0;
    }
    int add(int a, int b )
    {
        int sum = a + b;
        a = 7;
        return a + b;
    }

compile time error

What does the following statement mean?

int (*fp)(char*)

pointer to a pointer

pointer to an array of chars

pointer to function taking a char* argument and returns an int

function taking a char* argument and returning a pointer to int

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

#include <iostream>
    using namespace std;
    long factorial (long a)
    {
        if (a > 1)
            return (a * factorial (a + 1));
        else
            return (1);
    }
    int main ()
    {
        long num = 3;
        cout << num << "! = " << factorial ( num );
        return 0;
    }

segmentation fault

compile time error

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