UGC NET Questions Based on C Language || Interview Questions Based On C Language

 

C INTERVIEWS QUESTIONS

 

1.                 What's the C language?

2.                 Who has developed C language?

3.                 Describe the history of the C programming language.

4.                 Where is the C programming language used or the C language used?

5.                 What's the difference between C and C++?

6.                 What is the compared to the top-down approach and the bottom-up approach in programming languages?

7.                 Difference between Java and C?

8.                 C language was developed in which language?

9.                 Which year C language has been developed?

10.            What does programming language mean and give some examples?

11.            Describe the C standards.

12.            What are the key features of the C-language or the characteristics of the C-language?

13.            What's C embedded in it?

14.            Which level does the C language belong to?

15.            What do you mean by high-level, middle-level and low-level languages and give each of them an example?

16.            What is the difference between structured, object-oriented, and non-structure-oriented programming language?

17.            What's the compiler?

18.            What's the difference between the assembler, the compiler, and the interpreter?

19.            What is printf()?

20.            What is scanf()?

21.            What does the protocol mean?

22.            The execution of the C program starts with which function?

23.            What are all the sections that the C program can and must-have?

24.            What's the IDE?

25.            Please list some of the C compilers.

26.            What is the C-language header file?

27.            Is the case of C language-sensitive?

28.            What's the macro? Why are we using a macro?

29.            What is the type of data in C?

30.            What is the difference between the type of int, char, float, and double data?

31.            What's the use of the sizeof() function in C?

32.            What's the change in C?

33.            What are the different types of C modifiers?

34.            What's the Enum in C?

35.            What's the void in C?

36.            What's a C token?

37.            What kind of C tokens are there?

38.            What's a C identifier?

39.            What's the keyword in C?

40.            List some of the keywords available in the C language.

41.            What's the constant in C?

42.            What are the constant types in C?

43.            What's the variable in C?

44.            What is the difference in C between constant and variable?

45.            Can the name of the variable start with numbers?

46.            What is the difference between the declaration of variable and the definition of a variable in C?

47.            What are the different variable types in C?

48.            What's the local variable in C?

49.            What's the global variable in C?

50.            What is the C environment variable?

51.            What's the operator in C?

52.            What are the different types of C operators?

53.            What is the syntax for the C ternary operator?

54.            What is the C arithmetic operator?

55.            What's the assignment operator in C?

56.            What is the C relational operator?

57.            What's the logical C operator?

58.            What's the C bitwise operator?

59.            What are the decision control statements in C?

60.            What are the loop control statements in C?

61.            What's the difference between while and do-while loops in C?

62.            What is the difference between a single equal "=" and a double equal "= =" operator in C?

63.            What is the difference between the post-increment operator and pre-increment operator?

64.            What is the difference between a post-decrement operator and a pre-decrement operator?

65.            Explain the "*" and "&" operators in C?

66.            What happens if the break statement is not used in the C switch case?

67.            Why is the default statement used in the C switch case?

68.            What is the "goto" statement?

69.            What value is assigned to the variable X if a = 10, b = 20, c = 30, d = 40 for the expression X = a / b+c*d-c?

70.            What is the value assigned to the variables below? int X1 = 13/3; int X2 = 13%3;

71.            What is the difference between the auto variable and the C registry variable?

72.            What's the difference between the auto variable and the static variable in C?

73.            Where is the typecast function not to be used in C?

74.            How many arguments can be passed to the C function?

75.            What's the static function in C?

76.            If you want to run the C program even after the main function is finished, which function can be used?

77.            Is it possible to call atexit() more than once in a C program?

78.            What's the exit() function in C?

79.            Difference between exit() and return() in C?

80.            What is the use of "# define" in C?

81.            What is the syntax of the comments in C?

82.            What's the "# #" operator in C?

83.            What's the C pragma? Or how are you going to perform functions before and after the main function in the C program?

84.            How are you going to override the existing macro in C?

85.            How to check whether or not the macro is defined in the C program?

86.            What's the difference between memcpy() and strcpy() functions in C?

87.            What's the difference between memcpy() and memmove() functions in C?

88.            Is there any built-in library function in C to remove the leading and trailing spaces from the string? How are you going to remove them in C?

89.            What is the difference between the functions of strcpy() and strncpy() in C?

90.            Can array subscriptions have a negative value in C?

91.            What's the difference between the array and the C string?

92.            What's the pointer in C?

93.            What are the zero pointers in C?

94.            What's the NULL in C?

95.            What's the void pointer in C?

96.            What's the dangling pointer in C?

97.            What's the wild pointer in C?

98.            What's the C file pointer?

99.            When can the void pointer and the zero pointers be used in C?

100.       What's a C const pointer?

101.       Is the arithmetic pointer a valid one? Which arithmetic operation should not be valid in the pointer? Why?

102.       Is void arithmetic a valid pointer? Why?

103.       What's the difference between zero and Null?

104.       What is the difference between the zero pointers and the uninitialized pointer in C?

105.       Can the size of the array be declared at run time?

106.       What's a memory leak in C?

107.       What's going to happen when we try to access the zero pointers in C?

108.       What does segmentation fault or memory fault mean in C?

109.       What does the core dump in C mean?

110.       Can a pointer be freed in C more than once? What happens if we do it? Or can a pointer be set free twice in C?

111.       What's the size of the int pointer and the char pointer in C?

112.       How are you going to print the value and address of the pointer variable (example int * ptr) in C?

113.       How are you going to print the value and address of the normal variable (example int ptr) in C?

114.       What are the functions of the library and their use in the C language? Can we write our own features and include them in the C library?

115.       Can the variable name start with the underscore in C?

116.       Can the name of the variable have special symbols in C?

117.       What's the inline function in C?

118.       Is it possible to print "Hello World" in C without a semicolon? How is that?

119.       What is the scope of the local, global, and environmental variables in C?

120.       Why do we use C pointers?

121.       What's the static variable in C?

122.       What is the external and static function in C?

123.       What's the difference between the pointer and the array in C?

124.       Can variables in C be both volatile and constant?

125.       What is the main() function used in C?