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Test: C++ Function Declarations


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10 Questions MCQ Test C++ Programming for Beginners | Test: C++ Function Declarations

Test: C++ Function Declarations for Class 7 2023 is part of C++ Programming for Beginners preparation. The Test: C++ Function Declarations questions and answers have been prepared according to the Class 7 exam syllabus.The Test: C++ Function Declarations MCQs are made for Class 7 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: C++ Function Declarations below.
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Test: C++ Function Declarations - Question 1

What are mandatory parts in the function declaration?

Detailed Solution for Test: C++ Function Declarations - Question 1

In a function, return type and function name are mandatory all else are just used as a choice.

Test: C++ Function Declarations - Question 2

How many can max number of arguments present in function in the c99 compiler?

Detailed Solution for Test: C++ Function Declarations - Question 2

C99 allows to pass a maximum of 127 arguments in a function.

Test: C++ Function Declarations - Question 3

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

    #include <iostream>
    using namespace std;
    void mani()
    void mani()
    {
        cout<<"hai";
    }
    int main()
    {
        mani();
        return 0;
    }

Detailed Solution for Test: C++ Function Declarations - Question 3

We have to use the semicolon to declare the function in line 3. This is called a function declaration and a function declaration ends with a semicolon.

Test: C++ Function Declarations - Question 4

What is the scope of the variable declared in the user defined function?

Detailed Solution for Test: C++ Function Declarations - Question 4

The variable is valid only in the function block as in other.

Test: C++ Function Declarations - Question 5

Where does the execution of the program starts?

Detailed Solution for Test: C++ Function Declarations - Question 5

Normally the execution of the program in c++ starts from main only.

Test: C++ Function Declarations - Question 6

 which of the following is used to terminate the function declaration?

Detailed Solution for Test: C++ Function Declarations - Question 6

semicolon is used to terminate a function declaration statement in C++.

Test: C++ Function Declarations - Question 7

Which is more effective while calling the functions?

Detailed Solution for Test: C++ Function Declarations - Question 7

In the call by reference, it will just passes the reference of the memory addresses of passed values rather than copying the value to new memories which reduces the overall time and memory use.

Test: C++ Function Declarations - Question 8

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

    #include <iostream>
    using namespace std;
    void fun(int x, int y)
    {
        x = 20;
        y = 10;
    }
    int main()
    {
        int x = 10;
        fun(x, x);
        cout << x;
        return 0;
    }

Detailed Solution for Test: C++ Function Declarations - Question 8

In this program, we called by value so the value will not be changed, So the output is 10
Output:
$ g++ fun.cpp
$ a.out
10

Test: C++ Function Declarations - Question 9

How many minimum number of functions should be present in a C++ program for its execution?

Detailed Solution for Test: C++ Function Declarations - Question 9

The execution of a C++ program starts from main function hence we require atleast 1 function to be present in a C++ program to execute and i.e. the main function.

Test: C++ Function Declarations - Question 10

What will we not do with function pointers?

Detailed Solution for Test: C++ Function Declarations - Question 10

As it is used to execute a block of code, So we will not allocate or deallocate memory.

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