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If you’re preparing for C programming interview questions, then you are at the right site. Here are the best common interview questions on c to help you get going for that job interview. Who Invented C Language?  C was originally developed at Bell Labs by Dennis Ritchie between 1972 and 1973 to construct utilities running on Unix. What is the objective of the main () function in C? main() function is starting point of program execution. When program execution start the control of the program is directed towards the main() function. It is mandatory that every C language program has a main () function. What is difference between variables and constant? The value assigned to variable can be changed in-between execution but value assigned to constant remains changed during entire program. Can a C program compile without the main() function ? Yes, a C program can be compiled even without adding the main() function in a program but, it will not execute without the main() function. What a...