C interview questions with answers pdf for technical freshers. Our. Edu Blog. Learning C Language is the first important step that a science student take in the journey of their education. C language comprises of several small programs to even much large programs which can be learn easily. C language has been told as an easy language of learning and the programming concept in the world of computers. Different questions based on C programming are the hot topics and most asked questions that every interviewer asked during the recruitment of any organisation. Lets have a look over C interview questions with answers that has been asked in the various technical interviews- C Language role. C Interview questions with answers.
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What is a pointer? A pointer is a special variable, which stores the memory address.
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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 0th 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. Global variables persist throughout the scope of base blocks of memory that is their lifespan is throughout the program. Compare between array and pointer.
Array can allocate variables but cannot reallocate those variable if required. Define function prototype? The function prototype is the prototype which depends on the following: a.
Where the function pointers can be used? The function. The include looks after the new files and replace the contents of those files. Any type of suggestion will be highly appreciated. Download C interview questions and answers in pdf.