C INTERVIEWS QUESTIONS
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1. What's the C language? |
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2. Who has developed C language? |
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3. Describe the history of the C programming language. |
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4. Where is the C programming language used or the C language used? |
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5. What's the difference between C and C++? |
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6. What is the compared to the top-down
approach and the bottom-up approach in programming languages? |
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7. Difference between Java and C? |
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8. C language was developed in which language? |
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9. Which year C language has been developed? |
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10. What does programming language mean and
give some examples? |
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11. Describe the C standards. |
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12. What are the key features of the
C-language or the characteristics of the C-language? |
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13. What's C embedded in it? |
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14. Which level does the C language belong
to? |
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15. What do you mean by high-level,
middle-level and low-level languages and give each of them an example? |
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16. What is the difference between structured, object-oriented, and non-structure-oriented programming language? |
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17. What's the compiler? |
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18. What's the difference between the
assembler, the compiler, and the interpreter? |
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19. What is printf()? |
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20. What is scanf()? |
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21. What does the protocol mean? |
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22. The execution of the C program starts
with which function? |
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23. What are all the sections that the C program can and must-have? |
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24. What's the IDE? |
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25. Please list some of the C compilers. |
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26. What is the C-language header file? |
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27. Is the case of C language-sensitive? |
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28. What's the macro? Why are we using a
macro? |
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29. What is the type of data in C? |
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30. What is the difference between the type
of int, char, float, and double data? |
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31. What's the use of the sizeof() function
in C? |
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32. What's the change in C? |
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33. What are the different types of C
modifiers? |
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34. What's the Enum in C? |
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35. What's the void in C? |
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36. What's a C token? |
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37. What kind of C tokens are there? |
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38. What's a C identifier? |
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39. What's the keyword in C? |
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40. List some of the keywords available in
the C language. |
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41. What's the constant in C? |
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42. What are the constant types in C? |
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43. What's the variable in C? |
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44. What is the difference in C between
constant and variable? |
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45. Can the name of the variable start with
numbers? |
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46. What is the difference between the
declaration of variable and the definition of a variable in C? |
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47. What are the different variable types in
C? |
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48. What's the local variable in C? |
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49. What's the global variable in C? |
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50. What is the C environment variable? |
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51. What's the operator in C? |
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52. What are the different types of C
operators? |
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53. What is the syntax for the C ternary
operator? |
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54. What is the C arithmetic operator? |
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55. What's the assignment operator in C? |
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56. What is the C relational operator? |
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57. What's the logical C operator? |
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58. What's the C bitwise operator? |
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59. What are the decision control statements
in C? |
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60. What are the loop control statements in
C? |
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61. What's the difference between while and
do-while loops in C? |
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62. What is the difference between a single
equal "=" and a double equal "= =" operator in C? |
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63. What is the difference between the
post-increment operator and pre-increment operator? |
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64. What is the difference between a
post-decrement operator and a pre-decrement operator? |
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65. Explain the "*" and
"&" operators in C? |
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66. What happens if the break statement is
not used in the C switch case? |
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67. Why is the default statement used in the
C switch case? |
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68. What is the "goto" statement? |
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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? |
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70. What is the value assigned to the variables below? int X1 = 13/3; int X2 = 13%3; |
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71. What is the difference between the auto variable and the C registry variable? |
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72. What's the difference between the auto
variable and the static variable in C? |
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73. Where is the typecast function not to be
used in C? |
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74. How many arguments can be passed to the C
function? |
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75. What's the static function in C? |
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76. If you want to run the C program even
after the main function is finished, which function can be used? |
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77. Is it possible to call atexit() more than
once in a C program? |
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78. What's the exit() function in C? |
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79. Difference between exit() and return() in
C? |
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80. What is the use of "# define"
in C? |
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81. What is the syntax of the comments in C? |
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82. What's the "# #" operator in C? |
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83. What's the C pragma? Or how are you going to perform functions before and after the main function in the C program? |
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84. How are you going to override the existing macro in C? |
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85. How to check whether or not the macro is
defined in the C program? |
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86. What's the difference between memcpy()
and strcpy() functions in C? |
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87. What's the difference between memcpy()
and memmove() functions in C? |
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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? |
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89. What is the difference between the
functions of strcpy() and strncpy() in C? |
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90. Can array subscriptions have a negative
value in C? |
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91. What's the difference between the array
and the C string? |
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92. What's the pointer in C? |
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93. What are the zero pointers in C? |
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94. What's the NULL in C? |
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95. What's the void pointer in C? |
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96. What's the dangling pointer in C? |
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97. What's the wild pointer in C? |
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98. What's the C file pointer? |
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99. When can the void pointer and the zero
pointers be used in C? |
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100. What's a C const pointer? |
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101. Is the arithmetic pointer a valid one?
Which arithmetic operation should not be valid in the pointer? Why? |
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102. Is void arithmetic a valid pointer? Why? |
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103. What's the difference between zero and Null? |
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104. What is the difference between the zero
pointers and the uninitialized pointer in C? |
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105. Can the size of the array be declared at
run time? |
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106. What's a memory leak in C? |
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107. What's going to happen when we try to
access the zero pointers in C? |
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108. What does segmentation fault or memory
fault mean in C? |
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109. What does the core dump in C mean? |
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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? |
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111. What's the size of the int pointer and the char pointer in C? |
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112. How are you going to print the value and address of the pointer variable (example int * ptr) in C? |
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113. How are you going to print the value and address of the normal variable (example int ptr) in C? |
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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? |
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115. Can the variable name start with the
underscore in C? |
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116. Can the name of the variable have special
symbols in C? |
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117. What's the inline function in C? |
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118. Is it possible to print "Hello
World" in C without a semicolon? How is that? |
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119. What is the scope of the local, global,
and environmental variables in C? |
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120. Why do we use C pointers? |
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121. What's the static variable in C? |
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122. What is the external and static function
in C? |
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123. What's the difference between the pointer
and the array in C? |
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124. Can variables in C be both volatile and
constant? |
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125. What is the main() function used in C? |
