Question 1. which statement(s) is(are) true about using functions in a C program

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Question 1. which statement(s) is(are) true about using functions in a C program?

        (a) There is a small execution time overhead in storing program position data and jumping and returning from the function, but this should only be an issue for consideration in the most time critical systems

        (b) A function is written once and compiled into one area of memory, irrespective of the number of times that it is called from the main program, so program memory is reduced.

        (c) It is possible to ‘nest’ functions within functions, which can sometimes make software challenging to follow.

        (d) A limitation of C functions is that only a single value can be returned from the function, and arrays of data cannot be passed to or from a function (only single value variables can be used).

        (e) Functions allow clean and manageable code to be designed, allowing software to be well structured and readable at a number of levels of abstraction.

Question 2. At what stage in the program compilation process are predefined library files implemented?

       (a) Pre-compilation

       (b) Compiling

       (c) Debugging

       (d) Linking

       (e) None of (a) though (d) is the correct answer.

Question 3. which statement(s) is(are) false?

        (a) The pre-processor looks at a particular source file and implements any pre-processor directives and associated header files.

        (b) The extern storage class indicates that a variable or object has previously been defined in another .cpp or .h file, so it does not need redefining again.

        (c) The same header file might be called by a number of source files, but should only be compiled once.

        (d) The ifndef directive allows a variable to be defined and by analyzing whether the variable already exists or not, it can be ensured that the header data is only processed once during compilation.

        (e) Library files are drawn into the compilation process at the debugging stage.

Explanation / Answer

Answer :

Question 2. At what stage in the program compilation process are predefined library files implemented?

       (a) Pre-compilation

       (b) Compiling

       (c) Debugging

       (d) Linking

       (e) None of (a) though (d) is the correct answer.

Answer :

(e) None of (a) though (d) is the correct answer.

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