File Name: c interview programming questions and answers .zip
What is a pointer?
What is a pointer? A pointer is a special variable, which stores the memory address. Ampersand in front of a variable gets its address and asterisk in front of a pointer gets its value. What is null pointer? Null pointer is a pointer which cannot point to anywhere in the program, but uninitialised pointer can point to anywhere in the users program. In C, if the pointer tried to access 0th location, operating system kills the running program because operating system does not allow to access 0 th value.
Define function pointer? The function pointer is the pointer which accesses the address of a function. The running program occupies some memory space. Both the executable compiled program code and as well as user variables works on function pointers. In the C, each function has an address in a code segment. What is volatile variable? Volatile variables are those variables which alters the default way of the program.
The variable which do not change while compiling but are changeable during execution. Difference between global and static variable? Static variables persist throughout the scope, but the lifespan is not throughout the program.
Global variables persist throughout the scope of base blocks of memory that is their lifespan is throughout the program. What are the files automatically opened when C file is executed?
Standard in, standard out, standard error stdin, stdout, stderr are the files which are automatically opened when C file is executed. Compare between array and pointer. Array can allocate variables but cannot reallocate those variable if required. Whereas the pointer was assigned to allocate variables and they can also relocate and also are resizable. Define function prototype? The function prototype is the prototype which depends on the following: a. Where the function pointers can be used?
In C, the hash function tells the compiler that a statement should be sent to the C preprocessor. The include looks after the new files and replace the contents of those files. I am a fresher candidate. So i have no idea about that. I am last year engineering student, But I cant decide which is best field for my future as per knowledge. When dreaming for Software companies, C is one of the necessity to have a grip on. Thus this questions if not totally but will help you know the type mostly seeked by the interviewers.
I think it will be helpful for those people who want to take preperation for an interview that is mainly based on C Language….
It is referred to as a terminating null character and is used primarily to show the end of a string value. Answer: Break is used to control out of the block of code which is executing, we can use in loop statements or switch statements. Answer: The main function in c is the one which executes which you run the program but it is not the first function to be executed as there is another start function which gets executed to compile the libraries. Commonly asked C Questions. Yes No. Your email address will not be published. Necessary cookies are absolutely essential for the website to function properly.
Home page Contact Us. Net DWH New. C Programming Question and Answers.
C is the general and basic programming language that will create a base for other programming languages. C programming language was designed by Dennis Ritchie in Bells Lab. And it appeared around 46 years ago which is in and it was stably established on 11 December It is a crucial language of computer and it is coded in assembly language and it can run on from supercomputers to the embedded systems. The initialization of static variable Countis performed only at the first instance of the function call.
C questions and answers. C questions and answers with explanation. Switch case. File handling.
Your email address will not be published. Required fields are marked *