The following questions are based on what we have learned so far in Chapter 1 – Introduction to C programming. To test your understanding, try answering the following questions. The explanations are also provided to each question so you can always check the correctness of your answers. All the best 👍
Why do we need a programming language?
programming language helps humans to communicate with computers effectively so that the computers can understand the task we want them to perform.
Is C++ a C based programming language?
Yes. C++ and many other programming languages like Perl, C#, Java are all C based programming languages and therefore, this is one of the core reasons why everyone should learn C to solidify the concepts of programming in general.
State True or False.
The Unix Operating System was originally developed using C language, but later it is re-written in assembly language.
False. The opposite is true. The Unix operating system was originally developed using assembly language, but later it is re-written in C language.
What is stdio.h?
stdio.h is a header file because any filename that ends with “.h” is called header file in C.
What is the difference between predefined and user defined functions?
Predefined functions are already defined for us and are ready to use like printf, scanf, etc. On the other hand, user-defined functions, as the name suggests, are defined by us (the programmers).
Is printf() function a predefined function?
printf() function is a predefined function as it is already defined by someone and makes it available to us so that we can directly use it in our programs.
printf stands for
printf stands for print formatted.
return 0 at the end of the main() function indicates
putting return 0 at the end of the main() function is the way to indicate that the main() function, and hence the program, has executed successfully. It is the standard practice.
Determine the output of the following program:
#include <stdio.h>
int main() {
printf(“Hello User.”);
return 0;
}printf() function is used to print the string provided as an input to it. In this case, the string “Hello User.” is provided as an input, but printf function will not output the string with double-quotes. Only the characters within double-quotes will be printed. Hence, the output of the above program is Hello User.
What is a compiler?
Compiler is a software program written to convert C code to machine code.
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