Dear viewers, these Programming Questions in C for interview are planned specially to urge you familiar with the character of questions which you’ll encounter during your interview for the subject of C Programming. As per my experience of good interviewers are hardly plan to ask any particular question during your interview, normally questions start with some basic concept of the subject and later they continue based on further intense interact with what you answer –

So here are the Programming Questions in C for interview with answers.

Before learning these questions Read about the history of C

Differentiate between Call by Value and Call by Reference

One of the most asked Programming Questions in C is the difference between Call by Value and Call by Reference. Here is the proper Answer

Call by Value, is used for sending the value of a variable as parameter to a function, whereas Call by Reference is used to send the address of the variable. Also, under Call by Value, the value in the parameter is not changed by whatever operation that takes place, while in the case of Call by Reference, values can be changed by the process within the function.

What do you mean by stack?

A stack may be a sort of a knowledge structure. Data is stored in stacks using the FILO (First In Last Out) tactic. At any particular example, only the top of the stack is reachable, which means that in order to retrieve data that is kept inside the stack, those on the upper part should be pull out first. Storing data in a stack is also known as a PUSH, while data recovery is known as a POP.

Also Read – Programming Questions for Interview in C++ (With Answers)

What is meant by sequential access file?

One of the good Programming Questions in C for interview. Here is the proper answer

When writing programs that will store and recover data in a file, it is possible to label that file into different forms. A sequential access file is such that data are protected in sequential order: one data is positioned into the file after another. To access to a precise data within the sequential access file, data has to be read one line at a time, until the correct one is reached.

What do you mean by variable initialization and why is it important?

One of the logical Programming Questions in C. Here is the proper answer

The variable initialization refers to the method where as a variable is assigned an initial value before it’s utilized in the program. Without variable initialization, a variable would have an unfamiliar value, which can lead to unpredictable outputs when used in computational programming or other operations.

What do you mean by spaghetti programming?

Spaghetti programming denotes to the codes that tends to get snarled and overlapped throughout the program. The spaghetti programming has an unstructured approach to coding is usually accredited due to the lack of experience on the part of the programmer. Spaghetti programming makes a program complex and analysing these codes very difficult, then you want to be avoided the maximum amount as possible.

Distinguish between compilers and interpreters.

Most famous Programming Questions in C a interviewer can ask. Here is the proper answer

Compilers and interpreters often deal with how the program codes are completed. Interpreters executes the program codes one line at a time, while compilers take the program as a whole unit and converts it into object code, earlier than executing it. The key difference between them is that in the case of interpreters, a program may come across syntax errors within the middle of execution, and can stop from there. On the opposite hand, compilers check the syntax of the whole program and will only progress to execution when no syntax errors are found.

What do you mean by variables and what way is it different from constants?

This is also the most famous and asked Programming Questions in C. Here is the proper answer.

Variables and constants might at first look familiar in a sense that both are identifiers constitutes of one character or of more characters (letters, numbers and a few admissible symbols). Both variables and constants will already hold a particular value. Values held by such as a variable can be changed throughout the program, and can be used in most operations and calculations.

Constants are given one value at one time only, placed at the very beginning of a program. These values are not altered in the program. For example, you can be use the allotted with a constant named PI and then it is given a value of 3.1415. You can then use it as PI within the program, rather than writing the worth 3.1415 whenever you would like it.

What do you mean by modulus operator?

This Programming Questions in C is must for everyone to Remember. Here is the proper answer

The modulus operator returns the value of the remainder of a division. It makes practice of the percentage (%) symbol for its representation. For example: 10 % 3 = 1, meaning when you divide 10 by 3, the remainder of this is 1.

Define the uses of a semicolon (;) at the top of each program statement?

This is one of the logical Programming Questions in C for interview. Here is the Proper Answer

The semicolon has to do with the construing process and the compilation of the code. A semicolon turns as a delimiter, so that the compiler knows where each statement finishes, and can proceed to divide the statement into various smaller elements for syntax checking.

What are the advantages and disadvantages of using a  heap?

Last but not the least another good Programming Questions in C which a interviewer ca ask. Here is the proper answer.

Storing data on the heap is measured than it would take when using the stack. However, the main advantage of using the heap is because of its flexibility. That’s because of memory in this structure can be allocated and can be removed in any particular order. Slowness in the heap can be remunerated if an algorithm was well designed and implemented.