Monday, September 9, 2019

C Interview Question and Answer







1) What is C language?
C is a mid-level and procedural programming language. The Procedural programming language is also known as the structured programming language is a technique in which large programs are broken down into smaller modules, and each module uses structured code. This technique minimizes error and misinterpretation

2) Why is C known as a mother language?
C is known as a mother language because most of the compilers and JVMs are written in C language. Most of the languages which are developed after C language has borrowed heavily from it like C++, Python, Rust, javascript, etc. It introduces new core concepts like arrays, functions, file handling which are used in these languages.

3) Why is C called a mid-level programming language?
C is called a mid-level programming language because it binds the low level and high -level programming language. We can use C language as a System programming to develop the operating system as well as an Application programming to generate menu driven customer driven billing system.

4) Who is the founder of C language?
Dennis Ritchie.

5) When was C language developed?
C language was developed in 1972 at bell laboratories of AT&T.

6) What are the features of the C language?
The main features of C language are given below:
  • Simple: C is a simple language because it follows the structured approach, i.e., a program is broken into parts
  • Portable: C is highly portable means that once the program is written can be run on any machine with little or no modifications.
  • Mid Level: C is a mid-level programming language as it combines the low- level language with the features of the high-level language.
  • Structured: C is a structured language as the C program is broken into parts.
  • Fast Speed: C language is very fast as it uses a powerful set of data types and operators.
  • Memory Management: C provides an inbuilt memory function that saves the memory and improves the efficiency of our program.
  • Extensible: C is an extensible language as it can adopt new features in the future.

7) What is the use of printf() and scanf() functions?
printf(): The printf() function is used to print the integer, character, float and string values on to the screen.
Following are the format specifier:
  • %d: It is a format specifier used to print an integer value.
  • %s: It is a format specifier used to print a string.
  • %c: It is a format specifier used to display a character value.
  • %f: It is a format specifier used to display a floating point value.
scanf(): The scanf() function is used to take input from the user.


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