Top 50 C Programming MCQ Questions | C Programming Interview Questions

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Hello Peers, Today we are going to share Top Programming questions which was commonly asked in an interview. These questions are interview based and helps you in cracking interview of different companies.

Here, you will find Answers of Top C Programming Interview Questions in Bold Color which are given below.

These answers are updated recently and are 100% correct✅ answers.

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Q1. C Programming Language is often called as :

a) High-Level Language
b) Middle-Level Language
c) Low-Level Language
d) None of these

Q2. Which of the following is true about C programming language?

a) C is a structural language
b) C is a procedural language.
c) C does not support function within a function.
d) All of these

Q3. How many keywords are there in the C programming language?

a) 32
b) 28
c) 21
d) None of these

Q4. Which is not the extended keyword in C?

a) Imaginary
b) _Complex
c) inline
d) None of these

Q5. Process in which source code is combined with object code is termed as:

a) Linker
b) Loading
c) Linking
d) None of these

Q6. An object of type ‘char’ is of :

a) 1 byte
b) 2 bytes
c) 4 bytes
d) 8 bytes

Q7. For 32 bits environment, the size of the ‘int’ data type is:

a) 2 bytes
b) 4 bytes
c) 8 bytes
d) None of these

Q8. What is the minimal range of unsigned char data types?

a) -127 to 127
b) 0 to 255
c) -32767 to 32767
d) None of these

Q9. In C, the names of variables, functions, labels, and various other user-defined items are

a) keywords
b) Tokens
c) Identifiers
d) None of these

Q10. Variables that are declared inside a function are:

a) constants
b) literals
c) global
d) local

Q11. All non-global variables are by default :

a) auto
b) static
c) extern
d) register

Q12. You can direct the compiler to retail the values of local variables using _ modifier.

a) auto
b) static
c) extern
d) register

Q13. main() is :

a) keyword
b) function
c) both
d) None of these

Q14. This modifier tells the compiler that the value of the variable may change at any time – without any action being taken by the code the compiler finds nearby.

a) extern
b) public
c) void
d) volatile

Q15. Variables with keywords are only declared not defined.

a) auto
b) extern
c) static
d) register

Q16. Which of the following statement about ‘static variables’ is false?

a) Static variables are permanent variables within their own function or file.
b) Static local variables are not known outside the function or file.
c) Static variables maintain their values during function calls.
d) Static variables and global variables are the same.

Q17. Which operator is used to return the length of the variables in bytes?

a) size()
b) length()
c) leng()
d) sizeof()

Q18. The format identifier ‘%i’ is also used for :

a) char
b) int
c) float
d) double

Q19. Which data type is best for storing a number 65000 in a 32- bit system?

a) int
b) long
c) signed short
d) unsigned short

Q20. Which header file can be used to define the i/o function prototypes and macros?

a) stdio.h
b) conio.h
c) stdlib.h
d) alloc,h

Q21. Which of the following is an invalid if-else statement?

a) if (if (a == 1)){}
b) if (func1 (a)){}
c) if (a){}
d) if ((char) a){}

Q22. According to the ANSI specification, how to declare the main () function with command-line arguments?

a) int main(int argc, char *argv[])
b) int char main(int argc, *argv)
c) Both of the above
d) None of the above

Q23. const int *ptr; Which statement is true?

a) You cannot change the value pointed by ptr
b) You cannot change the pointer ptr itself
c) You May or may not change the value pointed by ptr
d) You can change the pointer as well as the value pointed by it

Q24. _ is used to break out of a program?

a) break
b) continue
c) terminate
d) exit

Q25. Which is an indirection operator among the following?
a) &
b) $
c) *
d) .

Q26. Which of the following does not initialize ptr to null (assume a = 0)?

a) int *ptr = &a;
b) int *ptr = &a – &a;
c) int ptr = a – a;
d) All of the mentioned

Q27. If : char s[10],p; p = s; then, s[i] can be written as :

a) s – i
b) p + i
c) *(s + i)
d) *(p + i)

Q28. When a function is called by itself again and again, then it is:

a) call by value
b) call by reference
c) recursion
d) system function call

Q29. Which can never be called by value using the call by value method?

a) structure
b) union
c) array
d) all of these

Q30. What is the maximum number of arguments that can be passed in a single function?

a) 341
b) 263
c) 253
d) 308

Q31. is the collection of similar-type elements?

a) Structure
b) Union
c) Array
d) String

Q32. Which is true about following statement in C :
void ( * abc( int, void ( def) () ) ) ();

a) abc is a pointer variable to pointer-type function def.
b) Illegal statement
c) abc is a ptr to a function that takes 2 parameters.
d) None of the above

Q33. What can not be declared:

a) Array of integers
b) Array of pointers
c) Array of structures
d) None of the above

Q34. Which of the following is not an arithmetic operation:

a) n/=10
b) n=10
c) n+=10
d) n!=10

Q35. Which datatype is not applicable for mod(%) operation?

a) int
b) float
c) char
d) None of these

Q36. Functions with the same name and different parameters
represents :

a) function overloading
b) function overriding
c) recursion
d) None of the mentioned

Q37. getch() is present in this header file

a) stdio.h
b) conio.h
c) stdlib.h
d) None of the mentioned

Q38. This keyword is used for defining new data type names.

a) docstring
b) typedef
c) Both of them
d) None of them

Q39. Which precision specifier the number of significant digits?

a) %g
b) %G
c) %f
d) Both a and b

Q40. In order to display the address, we need :

a) %q
b) %a
c) %p
d) None of the mentioned

Q41. is used to take user input in C.

a) input()
b) printf()
c) scanf()
d) None of the above

Q42. ‘%[ ]’ is used for :

a) taking an array as input
b) scans for the set of characters
c) takes an integer as input
d) None of the above

Q43. To avoid repetition of code and bulky programs, statements
are isolated inside a __
.

a) Functions
b) Modules
c) Header Files
d) None of the above

Q44. In C, the order of passing arguments to a function is done :

a) left to right
b) right to left
c) Randomly
d) Manually

Q45. pow() is present in which header file?

a) maths.h
b) arithmetic.h
c) process.h
d) math.h

Q46. In pointers, the meaning of ‘*’ is :

a) pointer variable
b) value at address
c) value of an address
d) None of the mentioned

Q47. When double is converted to float then the value is?
a) Truncated
b) Rounded
c) Depends upon the compiler
d) None of the mentioned

Q48. Can we declare a function inside the structure of C?

a) YES
b) NO
c) Both of them
d) None of them

Q49. Which of the following is a ternary operator in C?

a) &&
b) %%
c) !=
d) ?:

Q50. What is the use of the ‘%%’ specifier?

a) Finding remainder
b) Finding quotient
c) Printing % sign
d) None of the mentioned

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