C Programming.

1. Computer Programming 2. History of Prog.Language 3. Introduction to C 4. Features of C 5. Starting Turbo C 6. C Tokens 7. Basic requirement of C 8. Comments 9. My First Program in C 10. Line Break 11. C Escape Sequence 12. Constants or Literals 13. Variables in C 14. Data Types in C 15. Range of Data Types in C 16. Declare Variables 17. Reserved Key Words 18. printf( ) statement 19. Chained & Embedded state 20. Prog.to print sum of 2 nos 21. scanf( ) stament 22. print sum & average 23. print Area of Rectangle 24. Area & Circumference of Circle 25. Prg.for Simple Calculator 26. Operators in C 27. Ex. Of Operators 28. Swap two numbers 29. Hierarchy of Operators 30. if( ) statement 31. Prg.to check +ve,-ve or zero 32. if..else statement 33. Prg.to check Odd or Even 34. Prg.to print larger of 2 nos 35. Prg.to print largest of 3 nos 36. Prg.to check divisibility 37. Prg.to check print range 38. for. . . loop statement 39. prg.to print series of nos 40. Prg.to check divisibility 41. prg.to print sum of nos 42. Prg.to print Pyramid 43. prg.for Factorial 44. prg.to fill screen 45. prg.for largest/smallest no 46. prg.to print reverse no 47. prg.to add each digit 48. prg.for sum of factorial 49. prg.for fibonacci series 50. prg.to check Prime nos 51. prg. Prime no from 1 to 100 52. prg.Specified Prime nos 53. while( ) statement 54. do. . While statement 55. goto statement 56. break & continue state. 57. switch case statement 58. Array in C 59. Reverse order using array 60. Ascending/Descending order 61. prg.to search no in Array 62. Double Dimension Array 63. String in C 64. String with spaces in C 65. Print string in reverse 66. prg.to count A,E,I,O,U vowel 67. Function( ) in C 68. Function program examples 69. General Purpose Programs 70. Loan & EMI calculation prg. 71. Table print prg. 72. Leap year program 73. lower to UPPER case prg. 74. Frequency Distribution prg. 75. Bank note calculation prg. 76. Simple Interest prg. 77. Compound Interest prg. 78. Simple Depreciation prg. 79. Reducing bal.Depreciation 80. Marksheet prg. 81. Income Tax prg. 82. Time calculator prg. 83. Distance converter prg. 84. Volume Air Calculation 85. Time to fill Water Tank 86. Salary Calculation prg. 87. Total Sale Calculation prg. 88. Male/Female percentage prg. 89. Library Rent prg. 90. Office Expance prg. 91. Total Salary Calculation prg. 92. Profit or Loss prg. 93. Total Profit/Loss prg. 94. Convert Amt to Word. 95. ASCII Table 96. C Operators 97. C & C++ Reserved Keyword 98. C & C++ Pre-Define Function 99. C Interview Part1 100. C Interview Part2 101. C Interview Part3 102. C Interview Part4 103. C Interview Part5 104. C Interview Part6 105. C Interview Part7 106. C Interview Part8 107. C Interview Part9 108. C Interview Part10 109. C Interview Part11
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C Programming Interview Questions and Answers Part 2


11.What is C token?

  • The smallest individual units of a C program are known as tokens.

  • In every C program, the most basic element recognized by the compiler, is a single character or group of characters called C token.

  • The compiler first groups the characters into tokens.

  • A token is an atomic unit of source program, i.e., the compiler will not break down the token any further. 


12.List the different types of C tokens?

  • C has Six types of Tokens.

    1. Keyword:- for example int, char, while, else, class.

    2. Identifier:- for example main, amt, area, radius etc.

    3. Constant:- for example 121, 500, -150.

    4. String:- for example “cbtSAM”, “Hello” etc.

    5. Operators:- for example + - * /

    6. Special symbols:- for example { } [ ] etc.

13.What is a string?

  • A string is a sequence of characters ending with NUL.

  • It can be treated as a one–dimensional array of characters terminated by a NUL character.


14.What are qualifiers?

  • Qualifiers or modifiers are identifiers that may precede the scalar data types (except float) to specify the number of bits used for representing the respective type of data in memory.

  • The qualifiers in C are short, long, signed, and unsigned.


15.What is a function?

  • Functions are one of the fundamental building blocks of C.

  • The entire C code runs inside functions.

  • The parentheses following the word main() are distinguishing features of function.

  • The word void preceeding the function name indicates that this particular function does not have a return value.

  • Braces {}: The body of function is surrounded by braces sometimes you may even call them curly brackets.

  • They surround or delimit a block of program statement.

  • Every function must use this pair of braces, this braces{} indicates begin and end of the function.


16.What is a constant?

  • A constant is a value that does not change during the program execution. A constant used in C does not occupy memory.


17.What are the different types of constants?

  • There are five types of constants. They are :

  • Integer constants

  • Floating point constants

  • Character constants

  • String literals

  • Enumeration constants


18.What is variable?

  • An identifier is used to identify and store some value.

  • If the value of the identifier is changed during the execution of the program, then the identifier is known as variable.


19.What are the rules for the identifier?

  • The first character must be an alphabet or underscore (_)

  • Digits may be included in the variable

  • The maximum number of characters in a word are 32 (It may vary depending upon the platform)

  • No other special characters are allowed.


20.What are global variables?

  • Global Variables are those, which are required to be acccessed by all the functions defined after their declaration.

  • So, the variables declared before the main {) can be acccessed by all the functions, which follow their declaration.

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