Function - Study Mode
[#1] Use of functions
Correct Answer
Helps to avoid repeating a set of statements many times.
[#2] Any C program
Correct Answer
(A) Must contain at least one function.
Explanation
Solution: Option A: Must contain at least one function. Explanation: In C programming, every valid program must contain at least one function, which is typically the main() function. This function serves as the starting point of execution for the program. Option B: Need not contain any function. Explanation: This option is incorrect because every C program requires at least one function, typically the main() function, to execute. Option C: Needs input data. Explanation: While many programs do require input data, this is not a requirement for the structure of a C program itself. Input data is dependent on the specific requirements of the program being developed. Option D: None of the above. Explanation: This option is incorrect because Option A is correct—every C program must contain at least one function. Conclusion: Option A: Must contain at least one function.
[#3] What is function?
Correct Answer
(D) All of the above
[#4] The default parameter passing mechanism is
Correct Answer
(A) call by value
Explanation
Solution: In C programming, the default parameter passing mechanism is call by value . Call by value : In this mechanism, a copy of the actual parameter's value is passed to the function. The function operates on this copy, and changes made to the parameter within the function do not affect the original argument. Call by reference : This is not the default mechanism in C. It involves passing the address of the actual parameter, allowing the function to modify the original value. Call by value result : This mechanism is not used by default in C. It involves passing a copy of the actual parameter and then updating the original variable with the result after the function execution. None of these : This option is incorrect because call by value is indeed the default parameter passing mechanism in C. Thus, Option A: call by value is the correct answer.
[#5] Pick the correct statements. I.xa0xa0xa0The body of a function should have only one return statement. II.xa0xa0The body of a function may have many return statements. III.xa0A function can return only one value to the calling environment. IV.xa0If return statement is omitted, then the function does its job but returns no value to the calling environment.
Correct Answer
(C) II and III