C LANGUAGE – questionbanks.master2013.com

1. float x = 5/2.0; value is:
(A) 2
(B) 2.5
(C) 3
(D) 1
Answer: (B)

2. float x = 5/2; value is:
(A) 2
(B) 2
(C) 2.5
(D) error
Answer: (A)

3. fprintf prints formatted output to:
(A) monitor
(B) file
(C) memory
(D) CPU
Answer: (B)

4. int x; x uninitialized contains:
(A) zero
(B) garbage
(D) constant
Answer: (B)

5. Macro processor is part of:
(A) compiler
(B) preprocessor
(C) linker
(D) loader
Answer: (B)

6. Functions help in:
(A) code reuse
(B) slow
(C) no use
(D) error
Answer: (A)

7. default case executes when:
(A) match found
(B) no match
(C) always
(D) compile
Answer: (B)

8. scanf("%f",&x) uses:
(A) int
(B) char
(C) float
(D) string
Answer: (C)

9. Which is relational?
(A) ==
(B) &&
(C) \|\|
(D) !
Answer: (A)

10. void pointer size is:
(A) 1
(B) 2
(C) 4/8
(D) changes
Answer: (C)

11. putchar is part of:
(A) stdio.h
(B) math.h
(C) string.h
(D) stdlib.h
Answer: (A)

12. getchar is part of:
(A) stdio.h
(B) conio.h
(C) math.h
(D) string.h
Answer: (A)

13. C is compiled using:
(A) GCC
(B) JVM
(C) JIT
(D) interpreter
Answer: (A)

14. include is:
(A) directive
(B) function
(C) macro
(D) none
Answer: (A)

15. scanf needs:
(A) format specifier
(B) variable
(C) address
(D) all
Answer: (D)

16. %% prints:
(A) %
(B) &
(C) #
(D) @
Answer: (A)

17. Repetition is done by:
(A) switch
(B) loop
(C) struct
(D) pointer
Answer: (B)

18. break exits:
(A) loop
(B) block
(C) struct
(D) array
Answer: (A)

19. const variable cannot be:
(A) printed
(B) read
(C) modified
(D) declared
Answer: (C)

20. static variable initialized to:
(A) garbage
(B) zero
(C) one
(D) none
Answer: (B)

21. typedef creates:
(A) alias
(B) pointer
(C) structure
(D) array
Answer: (A)

22. perror prints:
(A) integer
(B) error message
(C) file
(D) string
Answer: (B)

23. fopen returns NULL when:
(A) file open
(B) success
(C) failure
(D) read mode
Answer: (C)

24. %o prints:
(A) octal
(B) hex
(C) decimal
(D) float
Answer: (A)

25. %x prints:
(A) octal
(B) hex
(C) binary
(D) decimal
Answer: (B)

26. String literal stored in:
(A) heap
(B) stack
(C) read-only memory
(D) file
Answer: (C)

27. C uses token:
(A) keyword
(B) identifier
(C) operator
(D) all
Answer: (D)

28. int a[10]; size is:
(A) 9
(B) 10
(C) 11
(D) 20
Answer: (B)

*29. int p; p is:**
(A) pointer to int
(B) int
(C) double
(D) array
Answer: (A)

30. C supports:
(A) inheritance
(B) polymorphism
(C) compile-time binding
(D) classes
Answer: (C)

31. fscanf reads from:
(A) keyboard
(B) file
(C) memory
(D) pointer
Answer: (B)

32. void function returns:
(A) int
(B) char
(C) nothing
(D) pointer
Answer: (C)

33. Register variable stored in:
(A) RAM
(B) CPU registers
(C) SSD
(D) GPU
Answer: (B)

34. Global variable scope:
(A) full file
(B) one function
(C) main only
(D) block only
Answer: (A)

35. A local variable exists in:
(A) whole program
(B) function/block
(C) file
(D) memory
Answer: (B)

36. #define PI 3.14 is:
(A) variable
(B) macro
(C) constant
(D) pointer
Answer: (B)

37. fprintf writes to:
(A) screen
(B) file
(C) memory
(D) input
Answer: (B)

38. FILE is:
(A) struct
(B) array
(C) macro
(D) function
Answer: (A)

39. Logical operators return:
(A) true/false
(B) int
(C) char
(D) string
Answer: (B)

40. math.h contains:
(A) sqrt
(B) strcpy
(C) fopen
(D) malloc
Answer: (A)

41. string.h contains:
(A) math
(B) array
(C) string functions
(D) loop
Answer: (C)

42. switch can use:
(A) double
(B) float
(C) int
(D) string
Answer: (C)

43. A pointer must be:
(A) initialized
(B) uninitialized
(C) dynamic
(D) global
Answer: (A)

44. scanf("%d",&x); requires:
(A) x is char
(B) x is int
(C) x is float
(D) x is string
Answer: (B)

45. The maximum array size is:
(A) infinite
(B) memory limit
(C) 10000
(D) 100
Answer: (B)

46. getline() is available in:
(A) C
(B) C++
(C) Java
(D) Python
Answer: (B)

47. Array stored in:
(A) stack
(B) heap
(C) both
(D) none
Answer: (A)

48. C is:
(A) Object-oriented
(B) Procedural
(C) Scripting
(D) Functional
Answer: (B)

49. Recursion uses:
(A) queue
(B) stack
(C) array
(D) heap
Answer: (B)

50. putc writes:
(A) char
(B) string
(C) number
(D) pointer
Answer: (A)

51. Preprocessor line starts with:
(A) @
(B) $
(C) #
(D) %
Answer: (C)

52. sizeof returns:
(A) bytes
(B) bits
(C) words
(D) MB
Answer: (A)

53. C programs start from:
(A) first line
(B) user function
(C) main()
(D) header
Answer: (C)

54. Which denotes pointer to function?
(A) f
(B) f()
*(C) (f)()**
(D) f()
Answer: (C)

55. continue works in:
(A) loops
(B) switch
(C) struct
(D) array
Answer: (A)

56. volatile keyword avoids:
(A) optimization
(B) execution
(C) linking
(D) reading
Answer: (A)

57. Which is NOT valid storage class?
(A) register
(B) auto
(C) static
(D) dynamic
Answer: (D)

58. sprintf writes to:
(A) file
(B) screen
(C) string
(D) memory
Answer: (C)

59. Array name is:
(A) pointer
(B) string
(C) function
(D) operator
Answer: (A)

60. getchar() returns type:
(A) int
(B) char
(C) string
(D) void
Answer: (A)

61. scanf returns:
(A) value read
(B) 0.0
(C) 1
(D) nothing
Answer: (A)

62. For loop syntax contains:
(A) 2 parts
(B) 3 parts
(C) 4 parts
(D) 5 parts
Answer: (B)

63. Default case in switch:
(A) mandatory
(B) optional
(C) error
(D) skip
Answer: (B)

64. Switch-case uses:
(A) break
(B) return
(C) exit
(D) stop
Answer: (A)

65. Pointer variable declared using:
(A) &
(B) *
(C) #
(D) %
Answer: (B)

66. realloc is used to:
(A) free memory
(B) expand/shrink memory
(C) copy memory
(D) delete memory
Answer: (B)

67. calloc stands for:
(A) clear alloc
(B) clean alloc
(C) contiguous allocation
(D) character allocate
Answer: (C)

68. Linking errors occur at:
(A) compile time
(B) link time
(C) runtime
(D) preprocessing
Answer: (B)

69. What is .o file?
(A) output
(B) object
(C) option
(D) original
Answer: (B)

70. Function without parameters:
(A) allowed
(B) not allowed
(C) error
(D) deprecated
Answer: (A)

71. Array indexing starts at:
(A) 1
(B) 2
(C) 0.0
(D) -1.0
Answer: (C)

72. Multidimensional array example:
(A) int a
(B) int a[]
(C) int a[][]
(D) int a()
Answer: (C)

73. strcpy copies:
(A) integers
(B) chars
(C) entire string
(D) float
Answer: (C)

74. strcmp("A","A") returns:
(A) 1
(B) 0.0
(C) -1.0
(D) 2
Answer: (B)

75. sizeof('A') returns:
(A) 1
(B) 2
(C) 4
(D) implementation dependent
Answer: (A)

76. goto transfers control to:
(A) function
(B) loop
(C) labeled point
(D) exit
Answer: (C)

77. Best for constant values:
(A) macros
(B) int
(C) char
(D) float
Answer: (A)

78. Void pointer can point to:
(A) char only
(B) int only
(C) any type
(D) none
Answer: (C)

79. Pointer arithmetic moves:
(A) 1 byte
(B) size of type
(C) 2 bytes
(D) none
Answer: (B)

80. getchar reads from:
(A) keyboard
(B) file
(C) memory
(D) CPU
Answer: (A)

81. The OR relational operator:
(A) >
(B) <
(C) ==
(D) !=
Answer: (D)

82. Compilation stages include:
(A) preprocessing
(B) linking
(C) assembling
(D) all
Answer: (D)

83. Header files extension:
(A) .h
(B) .hdr
(C) .hd
(D) .header
Answer: (A)

84. Preprocessor runs:
(A) after compiler
(B) before compiler
(C) runtime
(D) linker
Answer: (B)

85. Which is binary operator?
(A) ++
(B) --
(C) +
(D) !
Answer: (C)

86. Which is unary operator?
(A) +
(B) -
(C) ?
(D) !
Answer: (D)

87. strlen counts:
(A) all bytes
(B) characters
(C) memory
(D) numbers
Answer: (B)

88. sizeof returns value of type:
(A) int
(B) size_t
(C) long
(D) char
Answer: (B)

89. Recursion ends with:
(A) loop
(B) base case
(C) pointer
(D) return
Answer: (B)

90. A function inside a function is:
(A) supported
(B) not allowed
(C) object
(D) dynamic
Answer: (B)

91. switch cannot check:
(A) int
(B) char
(C) enum
(D) string
Answer: (D)

92. Which loop is fastest?
(A) for
(B) while
(C) do-while
(D) all similar
Answer: (D)

93. %p prints:
(A) pointer
(B) percent
(C) parameter
(D) program
Answer: (A)

94. %u prints:
(A) signed int
(B) unsigned int
(C) float
(D) char
Answer: (B)

95. fflush is for:
(A) buffer
(B) memory
(C) file
(D) screen
Answer: (A)

96. feof detects:
(A) loop
(B) integer
(C) end of file
(D) error
Answer: (C)

97. fclose closes:
(A) variable
(B) file
(C) pointer
(D) memory
Answer: (B)

98. fopen with “a” mode:
(A) overwrite
(B) append
(C) read
(D) none
Answer: (B)

99. fopen with “w” mode:
(A) read
(B) write
(C) append
(D) none
Answer: (B)

100. Which is unsafe?
(A) fgets
(B) gets
(C) scanf
(D) read
Answer: (B)

101. Which reads strings?
(A) gets()
(B) reads()
(C) scan()
(D) getline()
Answer: (A)

102. Which converts int to string?
(A) stoi
(B) atoi
(C) itoa
(D) str
Answer: (C)

103. Which converts string to int?
(A) atoi()
(B) itoa()
(C) stoi()
(D) convert()
Answer: (A)

104. Array of characters is:
(A) integer
(B) float
(C) string
(D) pointer
Answer: (C)

105. A pointer stores:
(A) number
(B) address
(C) string
(D) float
Answer: (B)

106. sizeof() is:
(A) operator
(B) function
(C) keyword
(D) macro
Answer: (A)

107. putchar() prints:
(A) string
(B) single character
(C) integer
(D) nothing
Answer: (B)

108. getchar() returns:
(A) string
(B) character
(C) integer ASCII
(D) bool
Answer: (C)

109. A function that does not return value uses:
(A) empty
(B) void
(C) int
(D) return
Answer: (B)

110. Which denotes logical NOT?
(A) !
(B) ~
(C) ^
(D) NOT
Answer: (A)

111. Function prototype ends with:
(A) ;
(B) .
(C) :
(D) nothing
Answer: (A)

112. Format specifier for string:
(A) %str
(B) %s
(C) %st
(D) &s
Answer: (B)

113. Format specifier for char:
(A) %c
(B) %d
(C) %f
(D) %ch
Answer: (A)

114. An uninitialized variable contains:
(A) zero
(B) garbage
(D) one
Answer: (B)

115. Which is not a valid keyword?
(A) auto
(B) float
(C) mutable
(D) goto
Answer: (C)

116. Reserved words are called:
(A) keywords
(B) tokens
(C) symbols
(D) operators
Answer: (A)

117. What is an identifier?
(A) constant
(B) variable name
(C) operator
(D) integer
Answer: (B)

118. What does break exit?
(A) switch
(B) loop
(C) both
(D) none
Answer: (C)

119. What does continue skip?
(A) loop
(B) iteration
(C) block
(D) program
Answer: (B)

120. Which is not looping statement?
(A) for
(B) do
(C) repeat
(D) while
Answer: (C)

121. What is sizeof(double)?
(A) 4
(B) 8
(C) 2
(D) 16
Answer: (B)

122. What is sizeof(float)?
(A) 2
(B) 4
(C) 8
(D) 1
Answer: (B)

123. Which shifts bits left?
(A) >>
(B) <<
(C) >>>
(D) <<<
Answer: (B)

124. Bitwise XOR operator is:
(A) ^
(B) &
(C) \|\|
(D) &&
Answer: (A)

125. Bitwise OR operator is:
(A) \|\|
(B) &
(C) \|
(D) \|\|
Answer: (D)

126. Which is bitwise AND?
(A) &&
(B) &
(C) ^
(D) \|\|
Answer: (D)

127. Which function copies strings?
(A) strcpy()
(B) copy()
(C) strcopy()
(D) cp()
Answer: (A)

128. malloc initializes memory with:
(A) zero
(B) garbage
(D) none
Answer: (B)

129. calloc initializes memory with:
(A) random
(B) zero
(C) -1.0
(D) garbage
Answer: (B)

130. strcat() performs:
(A) subtract
(B) append
(C) copy
(D) split
Answer: (B)

131. strchr() finds:
(A) integer
(B) float
(C) character
(D) file
Answer: (C)

132. abs() is for:
(A) absolute value
(B) sine
(C) cosine
(D) none
Answer: (A)

133. pow(a,b) means:
(A) a+b
(B) a–b
(C) ab
(D) a raised to b
Answer: (D)

134. Which finds square root?
(A) sqrt()
(B) root()
(C) power()
(D) sq()
Answer: (A)

135. argv contains:
(A) integer
(B) strings
(C) floats
(D) chars only
Answer: (B)

136. argc stands for:
(A) argument core
(B) argument count
(C) argument code
(D) argument call
Answer: (B)

137. Main() can have arguments:
(A) yes
(B) no
(C) sometimes
(D) never
Answer: (A)

138. fclose() is for:
(A) closing file
(B) open file
(C) reading file
(D) deleting
Answer: (A)

139. fwrite() is for:
(A) reading
(B) writing
(C) update
(D) delete
Answer: (B)

140. fopen() returns:
(A) int
(B) FILE*
(C) pointer
(D) void
Answer: (B)

141. Which is preprocessor directive?
(A) printf
(B) include
(C) #include
(D) scan
Answer: (C)

142. Pointer to pointer uses:
(A) *
(B) **
(C) #
(D) &
Answer: (B)

143. strcmp returns:
(A) 0 or 1
(B) always 1
(C) +, -, 0
(D) ASCII only
Answer: (C)

144. Modulus cannot be used with:
(A) int
(B) float
(C) char
(D) long
Answer: (B)

145. C uses:
(A) compiler
(B) interpreter
(C) both
(D) translator
Answer: (A)

146. sizeof(char) is:
(A) 1
(B) 2
(C) 4
(D) varies
Answer: (A)

147. NULL pointer value is:
(A) 0.0
(B) -1.0
(C) random
Answer: (A)

148. The value of a bool in C is:
(A) True/False
(B) 1/0
(C) Yes/No
(D) A/B
Answer: (B)

149. Enum creates:
(A) array
(B) user-defined constants
(C) strings
(D) classes
Answer: (B)

150. Which is correct comment?
*(A) / /*
(B) //
(C) both
(D) #
Answer: (C)

151. The ternary operator has:
(A) two operands
(B) one
(C) three
(D) four
Answer: (C)

152. register keyword stores variable in:
(A) RAM
(B) CPU register
(C) Hard disk
(D) cache
Answer: (B)

153. Which is NOT storage class?
(A) auto
(B) static
(C) register
(D) define
Answer: (D)

154. Which creates infinite loop?
(A) while(0)
(B) for( ; ; )
(C) do while(0)
(D) if(0)
Answer: (B)

155. Which operator has highest precedence?
(A) +
(B) -
(C) *
(D) ()
Answer: (D)

156. EOF means:
(A) end of file
(B) end of function
(C) error
(D) none
Answer: (A)

157. Which function sorts array?
(A) sort()
(B) order()
(C) qsort()
(D) array_sort()
Answer: (C)

158. Recursion means:
(A) loop
(B) function calling itself
(C) pointer
(D) macro
Answer: (B)

159. Switch works with:
(A) string
(B) float
(C) int & char
(D) file
Answer: (C)

160. free() is used for:
(A) file
(B) memory
(C) pointers
(D) variables
Answer: (B)

161. malloc() returns:
(A) int
(B) float
(C) void*
(D) char*
Answer: (C)

162. Which memory allocation is dynamic?
(A) static
(B) automatic
(C) malloc()
(D) define
Answer: (C)

163. Strings in C end with:
(A) '#'
(B) '?'
(C) '\n'
(D) '\0'
Answer: (D)

164. What does strlen() return?
(A) number of chars + null
(B) number of chars
(C) bytes
(D) index
Answer: (B)

165. Which formats float?
(A) %d
(B) %f
(C) %lf
(D) %x
Answer: (B)

166. Which format specifier prints integer?
(A) %d
(B) %f
(C) %c
(D) %s
Answer: (A)

167. Which keyword is used to exit a loop?
(A) stop
(B) quit
(C) break
(D) exit
Answer: (C)

168. Which operator accesses members via pointer?
(A) .
(B) ->
(C) *
(D) &
Answer: (B)

169. Which operator accesses struct members?
(A) .
(B) ->
(C) *
(D) &
Answer: (A)

170. What is segmentation fault?
(A) compile error
(B) runtime error
(C) syntax error
(D) logical error
Answer: (B)

171. Which symbol denotes address-of?
(A) *
(B) &
(C) #
(D) $
Answer: (B)

172. What is pointer?
(A) variable storing address
(B) constant
(C) function
(D) operator
Answer: (A)

173. Which loop runs at least once?
(A) for
(B) while
(C) do-while
(D) none
Answer: (C)

174. Which is a conditional operator?
(A) ? :
(B) if
(C) switch
(D) loop
Answer: (A)

175. Which keyword creates a user-defined data type?
(A) struct
(B) type
(C) class
(D) define
Answer: (A)

176. Which operator is assignment?
(A) ==
(B) =
(C) :=
(D) ===
Answer: (B)

177. What is the return type of main()?
(A) void
(B) int
(C) char
(D) float
Answer: (B)

178. Which is a valid variable name?
(A) 9num
(B) _num
*(C) num**
(D) num-1
Answer: (B)

179. Which function clears the screen in C?
(A) clear()
(B) cls()
(C) clrscr()
(D) reset()
Answer: (C)

180. Which operator is used for pointers?
(A) & and *
(B) # and @
(C) {}
(D) []
Answer: (A)

181. What is used to define macros?
(A) #macro
(B) macro
(C) #define
(D) define
Answer: (C)

182. Which indexing does C use?
(A) 1-based
(B) 2-based
(C) 0-based
(D) dynamic
Answer: (C)

183. What is an array?
(A) collection of data
(B) single variable
(C) pointer
(D) keyword
Answer: (A)

184. Which operator gives remainder?
(A) /
(B) *
(C) %
(D) //
Answer: (C)

185. Which data type stores characters?
(A) char
(B) string
(C) str
(D) character
Answer: (A)

186. Which is not a logical operator?
(A) &&
(B) \|\|
(C) !
(D) &
Answer: (D)

187. The sizeof(int) is usually:
(A) 1 byte
(B) 2 bytes
(C) 4 bytes
(D) 8 bytes
Answer: (C)

188. Which loop is entry-controlled?
(A) for
(B) while
(C) do-while
(D) both 1 and 2
Answer: (D)

189. Which escape sequence is new line?
(A) \t
(B) \r
(C) \b
(D) \n
Answer: (D)

190. Which data type is used for decimal values?
(A) int
(B) float
(C) char
(D) long
Answer: (B)

191. Which keyword defines a constant?
(A) const
(B) constant
(C) final
(D) static
Answer: (A)

192. Which function takes input in C?
(A) scan()
(B) input()
(C) scanf()
(D) read()
Answer: (C)

193. Which is the correct file extension for C?
(A) .cpp
(B) .java
(C) .c
(D) .py
Answer: (C)

194. C language is a ___ language.
(A) high-level
(B) low-level
(C) mid-level
(D) machine-level
Answer: (C)

195. Which header file is required for printf()?
(A) stdio.h
(B) stdlib.h
(C) math.h
(D) string.h
Answer: (A)

196. Who is the creator of C language?
(A) James Gosling
(B) Bjarne Stroustrup
(C) Dennis Ritchie
(D) Ken Thompson
Answer: (C)

197. Which symbol is used to end a C statement?
(A) .
(B) ;
(C) :
(D) ,
Answer: (B)