I BCom Cs C Language Viva Questions

C Viva Questions

1.      What are Translators?

2.      Difference between Interpreter and Compiler.

3.      Features of “C” Language.

4.      Applications of “C” language?

5.      Structure of “C” program.

6.      What is an Escape Sequence, What are they?

7.      What is Character set?(about ASCII)

8.      Mention ‘C’ tokens.

9.      What are Keywords and Identifiers? Mention some of them.

10.  What are constants?                                                            11.  What are Integer Constants?

12.  What are Single character Constants?                              13.  What are string constants?

14.  What are variables? Types of variables?

15.  What are different data types that ‘C’ supports?

16.  What are fundamental datatypes?                                   17.  What is declaration of variables?

18.  What are various operators supported by ‘C’ , Explain with syntax and example.

(Arithmetic operators, Relational operators, Logical operators, Assignment operators, Increment and Decrement operators, Bitwise operators).

19.  Precedence of Arithmetic operators.

20.  Mathematical Functions.

21.  Reading a character(Explain ‘getchar’).

22.  Reading string of characters (Explain ‘gets()’).

23.  Formatted Input (Explain ‘scanf’).

24.  Writing a character (Explain ‘putchar()’).

25.  Writing string of characters (Explain ‘puts()’).

26.  Writing a formatted output (printf).

27.  Explain ‘if’ structure.

28.  Explain ‘if-else’ structure.

29.  Explain ‘else-if’ structure.

30.  Explain ‘Switch’ statement with syntax.

31.  Explain ‘GoTo’ statement.

32.  What is looping? Types of looping statements.

33.  Explain ‘While’ statement with syntax and example.

34.  Explain ‘do-While’ statement with syntax and example.

35.  Explain ‘for’ statement with syntax and example.

36.  What is an array?       

37.  What are various string functions?

38.  What is a function declaration or prototype? 

39.  What is a function?

40.  What are the parts of Function definition?

41.  Explain the function concept.

42.  Explain category of functions.                                

43.  What is a ‘call by value’ or ‘pass by value’?

44.How is an array element referred?

45.What does an array name contains?

46.Uses of arrays

47.What are one dimensional arrays?

48.what are two dimensional arrays?

49.What are multidimensional arrays?

50.What is the difference between getch() and gets()

51.How any array is passed as an argument to a functions?

52.What is scope of a variable?

53.What is visibility of a variable?

54.What is lifetime of a variable?

55.What are the various storage classes?

56.What are qualifiers?

57.What are external and register variables?

58.What are automatic and static variables?

59.What are local and global variables?

60.What is a structure?

61.Compare arrays and structures?

62.How elements of structure variables are referred?
      What are bit fields?

63.What is a Union?

64.Compare Structure and Union?

65.What are pointers?

66.How pointers variables are declared?

67.What do pointer variables contain?

68.How do we access value pointed to by a pointer variable?

69.What can be assigned to a pointer variable?

70.what operations can be performed on pointer variables?

71.Compare pointers and arrays?

72.What is a NULL value?

73.What operations are not allowed on pointer variables?

74. What is preprocessor?

75. What is # include statement?

76. What is # define or symbolic constant statement?
      What is a macro substitution?

77. What is conditional compilation in preprocessor?

78. What are .h files and what they contain? (Ans : stdio.h, conio.h, math.h, string.h,type.h etc)