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C Programming Tutorial Interview Questions


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C Programming Tutorial Interview Questions

C programming language, the pioneer of programming languages, is a procedural programming language. Dennis Ritchie created it as a system programming language for writing operating systems. It is one of the most popular programming languages because of its structure, high-level abstraction, machine-independent feature, etc. and is a great starting point for anyone wanting to get into coding.

C has characteristics of both assembly-level i.e. low-level and higher-level languages. So as a result, C is commonly called a middle-level language. Using C, a user can write an operating system as well as create a menu-driven consumer billing system.

The individual elements of a program are called Tokens. There are following 6 types of tokens are available in C

  • Identifiers
  •  Keywords
  • Constants
  •  Operators
  • Special Characters
  •  Strings
  • The most commonly used built-in functions in C are sacnf(), printf(), strcpy, strlwr, strcmp, strlen, strcat, and many more.
  • Built-function is also known as library functions that are provided by the system to make the life of a developer easy by assisting them to do certain commonly used predefined tasks. For example, if you need to print output or your program into the terminal, we use printf() in C.

There are different kinds of pointers available in the C language and it is one of the popular questions in the interviews for C programmers. Different types of pointersff include NULL, far pointer, dangling pointer, pointer-to-pointer

The program will be compiled but will not be executed. To execute any C program, main() is required.


 The array is a simple data structure that stores multiple elements of the same datatype in a reserved and sequential manner. There are three types of arrays, namely,

  • One Dimensional Array
  •  Two Dimensional Array
  •  Multi-Dimensional Array

The different storage specifiers available in C Language are as follows:

  •  auto
  • register
  • static
  •  extern

The mistakes/errors that occur while creating a program are called syntax errors. Misspelled commands or incorrect case commands, an incorrect number of parameters in calling method /function, data type mismatches can be identified as common examples for syntax errors.

 There are 5 modifiers available in the C programming language as follows:

  • Short
  • Long
  • Signed
  • Unsigned
  • long long

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