C++ LANGUAGE – questionbanks.master2013.com

1. Final keyword used for?
(A) stop execution
(B) prevent inheritance
(C) free memory
(D) polymorphism
Answer: (B)

2. delete keyword frees?
(A) stack
(B) heap
(C) code
(D) static
Answer: (B)

3. Which accesses base class?
(A) base::
(B) this->
(C) parent->
(D) class::
Answer: (A)

4. noexcept means?
(A) may throw
(B) will not throw
(C) throw always
(D) unknown
Answer: (B)

5. Which cast dangerous?
(A) reinterpret_cast
(B) static_cast
(C) const_cast
(D) dynamic_cast
Answer: (A)

6. const_cast modifies?
(A) const to non-const
(B) object
(C) method
(D) none
Answer: (A)

7. Which moves resources?
(A) copy
(B) move
(C) swap
(D) cast
Answer: (B)

8. move semantics introduced in?
(A) C++11
(B) C++14
(C) C++17
(D) C++03
Answer: (A)

9. Which uses RAII?
(A) smart pointers
(B) raw pointers
(C) arrays
(D) loops
Answer: (A)

10. Which deletes on 0 reference?
(A) shared_ptr
(B) unique_ptr
(C) weak_ptr
(D) raw
Answer: (A)

11. weak_ptr breaks?
(A) circular reference
(B) dynamic
(C) static
(D) memory limit
Answer: (A)

12. unique_ptr has?
(A) shared ownership
(B) unique ownership
(C) no ownership
(D) static
Answer: (B)

13. shared_ptr shares?
(A) ownership
(B) memory
(C) threads
(D) reference
Answer: (A)

14. smart pointer type?
(A) auto_ptr
(B) shared_ptr
(C) unique_ptr
(D) all
Answer: (D)

15. Which creates thread?
(A)
(B)
(C)
(D)
Answer: (A)

16. Which is constant iterator?
(A) cbegin
(B) cbefore
(C) cint
(D) cfor
Answer: (A)

17. Which sorting function exists in STL?
(A) sort()
(B) arrange()
(C) quicksort()
(D) sorted()
Answer: (A)

18. Which stores key-value?
(A) queue
(B) vector
(C) map
(D) stack
Answer: (C)

19. STL stands for?
(A) System Template Library
(B) Standard Template Library
(C) Static Type Library
(D) Standard Time Library
Answer: (B)

20. cout is defined in?
(A) std namespace
(B) global
(C) object
(D) library
Answer: (A)

21. Realloc exists in?
(A) C++
(B) C
(C) Java
(D) Python
Answer: (B)

22. Pointer arithmetic allowed on?
(A) int*
(B) void*
(C) float only
(D) none
Answer: (A)

23. Which ends namespace?
(A) }
(B) end
(C) endnamespace
(D) #
Answer: (A)

24. Template class keyword?
(A) class only
(B) typename only
(C) both
(D) none
Answer: (C)

25. Base class constructor runs?
(A) after derived
(B) before derived
(C) random
(D) never
Answer: (B)

26. Delete array uses?
(A) delete
(B) delete[]
(C) free
(D) clear
Answer: (B)

27. Which prevents copying?
(A) delete copy constructor
(B) static
(C) final
(D) friend
Answer: (A)

28. Segmentation fault occurs when?
(A) normal use
(B) invalid access
(C) good pointer
(D) none
Answer: (B)

29. Memory leak means?
(A) freed memory
(B) unfreed memory
(C) double free
(D) null pointer
Answer: (B)

30. which removes last element?
(A) pop_front
(B) pop
(C) pop_back
(D) erase
Answer: (C)

31. vector push_back inserts at?
(A) front
(B) back
(C) middle
(D) none
Answer: (B)

32. Which throws exception?
(A) try
(B) throw
(C) catch
(D) exit
Answer: (B)

33. which handles exception?
(A) try
(B) throw
(C) catch
(D) final
Answer: (C)

34. Inline increases?
(A) speed
(B) overhead
(C) memory
(D) time
Answer: (A)

35. Which is FIFO?
(A) stack
(B) queue
(C) list
(D) set
Answer: (B)

36. deque supports?
(A) front/back inserts
(B) only back
(C) only front
(D) none
Answer: (A)

37. List is?
(A) singly linked
(B) doubly linked
(C) array-based
(D) static
Answer: (B)

38. Which is sequential container?
(A) list
(B) queue
(C) set
(D) map
Answer: (A)

39. friend allows?
(A) private access
(B) no access
(C) pointer
(D) template
Answer: (A)

40. mutable allows?
(A) override const
(B) delete
(C) private
(D) none
Answer: (A)

41. const variable means?
(A) mutable
(B) not modifiable
(C) dynamic
(D) static
Answer: (B)

42. Which supports run-time cast?
(A) dynamic_cast
(B) static_cast
(C) const_cast
(D) reinterpret_cast
Answer: (A)

43. Which casts safely?
(A) static_cast
(B) C-cast
(C) reinterpret_cast
(D) pointer_cast
Answer: (A)

44. Which is user-defined?
(A) enum
(B) struct
(C) class
(D) all
Answer: (D)

45. sizeof(float) usually?
(A) 1
(B) 2
(C) 4
(D) 8
Answer: (C)

46. Which cannot be in switch?
(A) int
(B) char
(C) float
(D) enum
Answer: (C)

47. switch matches?
(A) variable
(B) expression
(C) constant
(D) condition
Answer: (C)

48. break exits?
(A) loop
(B) class
(C) function
(D) namespace
Answer: (A)

49. continue skips to?
(A) end
(B) next iteration
(C) previous
(D) break
Answer: (B)

50. do-while executes?
(A) 0 times
(B) at least once
(C) never
(D) twice
Answer: (B)

51. Template supports?
(A) dynamic type
(B) generic type
(C) static type
(D) low type
Answer: (B)

52. RTTI requires?
(A) destructor
(B) virtual function
(C) template
(D) namespace
Answer: (B)

53. Pure virtual ends with?
(A) ;
(B) :
(C) ::
(D) .
Answer: (A)

54. cin >> x extracts?
(A) characters
(B) input
(C) output
(D) stream
Answer: (B)

55. friend function defined?
(A) inside class
(B) outside class
(C) both
(D) header
Answer: (B)

*56. int p means?**
(A) pointer to int
(B) int to pointer
(C) reference
(D) variable
Answer: (A)

57. Which is address operator?
(A) *
(B) &
(C) ->
(D) %
Answer: (B)

58. cout belongs to?
(A) std
(B) global
(C) io
(D) clib
Answer: (A)

59. new throws?
(A) exception
(B) warning
(C) compile error
(D) none
Answer: (A)

60. Polymorphism used for?
(A) reuse
(B) many forms
(C) multiple classes
(D) abstraction
Answer: (B)

61. cout << x equivalent to?
(A) put
(B) write
(C) operator<<
(D) append
Answer: (C)

62. Floating default type?
(A) float
(B) double
(C) long double
(D) decimal
Answer: (B)

63. Which function ends program?
(A) break
(B) return
(C) exit()
(D) continue
Answer: (C)

64. Which type stores true/false?
(A) bool
(B) int
(C) float
(D) char
Answer: (A)

65. char array ends with?
(A) /
(B) \0
(C) \n
(D) blank
Answer: (B)

66. cin.fail() indicates?
(A) no error
(B) error
(C) overflow
(D) exit
Answer: (B)

67. Iterator that cannot modify?
(A) const
(B) input
(C) forward
(D) fixed
Answer: (A)

68. Which header for vectors?
(A)
(B)
(C)
(D)
Answer: (A)

69. Which is not a valid cast?
(A) static_cast
(B) dynamic_cast
(C) friendly_cast
(D) reinterpret_cast
Answer: (C)

70. Which container is LIFO?
(A) queue
(B) list
(C) stack
(D) set
Answer: (C)

71. Which pointer deletes automatically?
(A) raw
(B) smart
(C) void
(D) static
Answer: (B)

72. Which creates smart pointer?
(A) std::pointer
(B) std::make_shared
(C) new
(D) alloc
Answer: (B)

73. nullptr introduced in?
(A) C++98
(B) C++11
(C) C++14
(D) C++17
Answer: (B)

74. auto keyword means?
(A) any type
(B) int
(C) double
(D) pointer
Answer: (A)

75. Lambda introduced in?
(A) C++11
(B) C++98
(C) C++03
(D) C++20
Answer: (A)

76. static memory allocated?
(A) stack
(B) heap
(C) compile-time
(D) runtime
Answer: (C)

77. Operator new can be overloaded?
(A) No
(B) Yes
(C) sometimes
(D) never
Answer: (B)

78. sizeof is a?
(A) operator
(B) function
(C) macro
(D) template
Answer: (A)

79. Which cannot be friend?
(A) class
(B) object
(C) function
(D) member
Answer: (B)

80. Which operator overloads array access?
(A) ()
(B) []
(C) <>
(D) {}
Answer: (B)

81. virtual table stores?
(A) objects
(B) functions
(C) virtual functions
(D) classes
Answer: (C)

82. this pointer stores?
(A) base address
(B) object address
(C) class name
(D) variable
Answer: (B)

83. Deep copy copies?
(A) pointers only
(B) addresses
(C) values
(D) code
Answer: (C)

84. Default copy constructor works as?
(A) shallow copy
(B) deep copy
(C) runtime copy
(D) virtual copy
Answer: (A)

85. Copy constructor parameter?
(A) reference
(B) pointer
(C) value
(D) integer
Answer: (A)

86. Which prevents overriding?
(A) constant
(B) virtual
(C) final
(D) static
Answer: (C)

87. inline is a?
(A) request
(B) guarantee
(C) directive
(D) warning
Answer: (A)

88. map find complexity?
(A) O(1)
(B) O(n)
(C) O(log n)
(D) O(n log n)
Answer: (C)

89. vector insert complexity?
(A) O(1)
(B) O(n)
(C) O(log n)
(D) O(n log n)
Answer: (B)

90. unordered_map uses?
(A) tree
(B) hash table
(C) list
(D) vector
Answer: (B)

91. set container is based on?
(A) linked list
(B) binary tree
(C) array
(D) hash
Answer: (B)

92. pointer to object uses?
(A) .*
(B) ->*
(C) ->
(D) .
Answer: (C)

93. ios::trunc means?
(A) append
(B) truncate
(C) read
(D) write
Answer: (B)

94. ios::app means?
(A) overwrite
(B) append
(C) read-only
(D) close
Answer: (B)

95. File stream for input?
(A) ifstream
(B) fstream
(C) ostream
(D) filein
Answer: (A)

96. File stream for output?
(A) ifstream
(B) ofstream
(C) fstream
(D) ostream
Answer: (B)

97. A pure virtual class is called?
(A) incomplete
(B) abstract
(C) useless
(D) virtualized
Answer: (B)

98. Which operator gets member address?
(A) *
(B) ->*
(C) .*
(D) #
Answer: (C)

99. Which ends program on error?
(A) abort()
(B) exit()
(C) stop()
(D) quit()
Answer: (A)

100. Catch block handles?
(A) errors
(B) exceptions
(C) loops
(D) objects
Answer: (B)

101. Exception handling keyword?
(A) try
(B) catch
(C) throw
(D) all
Answer: (D)

102. Template type placeholder?
(A) value
(B) type
(C) class or typename
(D) var
Answer: (C)

103. Which is used for generic programming?
(A) classes
(B) templates
(C) files
(D) arrays
Answer: (B)

104. Which iterator allows backward movement?
(A) forward
(B) bidirectional
(C) input
(D) output
Answer: (B)

105. map stores?
(A) duplicates
(B) sorted key-value
(C) arrays
(D) graphs
Answer: (B)

106. Which is double ended queue?
(A) vector
(B) list
(C) deque
(D) map
Answer: (C)

107. Which container stores sorted unique items?
(A) vector
(B) set
(C) list
(D) deque
Answer: (B)

108. endl inserts?
(A) new line
(B) tab
(C) space
(D) blank
Answer: (A)

109. setprecision controls?
(A) width
(B) decimals
(C) rounding
(D) alignment
Answer: (B)

110. setw controls?
(A) width
(B) precision
(C) spacing
(D) position
Answer: (A)

111. Which operator accesses scope?
(A) ->
(B) .
(C) ::
(D) %
Answer: (C)

112. Overriding is?
(A) compile-time
(B) run-time
(C) hybrid
(D) impossible
Answer: (B)

113. Overloading is?
(A) compile-time
(B) run-time
(C) dynamic
(D) template
Answer: (A)

114. Virtual destructor?
(A) invalid
(B) recommended
(C) forbidden
(D) optional
Answer: (B)

115. Polymorphism type?
(A) static
(B) dynamic
(C) both
(D) none
Answer: (C)

116. Class default access?
(A) protected
(B) public
(C) private
(D) static
Answer: (C)

117. Struct default access?
(A) private
(B) public
(C) protected
(D) virtual
Answer: (B)

118. Which is not OOP?
(A) collection
(B) polymorphism
(C) inheritance
(D) abstraction
Answer: (A)

119. delete frees?
(A) stack
(B) heap
(C) static
(D) const
Answer: (B)

120. new returns?
(A) void
(B) pointer
(C) int
(D) char
Answer: (B)

121. Reference must be?
(A) re-assigned
(B) constant
(C) initialized
(D) deleted
Answer: (C)

122. Reference variable uses?
(A) &
(B) @
(C) %
(D) ^
Answer: (A)

123. Static function accesses?
(A) only static members
(B) all
(C) none
(D) virtual only
Answer: (A)

124. Static member belongs to?
(A) objects
(B) class
(C) functions
(D) namespace
Answer: (B)

125. Friend keyword grants?
(A) private access
(B) public access
(C) pointer access
(D) no access
Answer: (A)

126. Diamond problem solved by?
(A) templates
(B) virtual base classes
(C) operator overloading
(D) macros
Answer: (B)

127. Multiple inheritance means?
(A) many objects
(B) many bases
(C) many loops
(D) many data
Answer: (B)

128. Which class cannot be instantiated?
(A) Abstract
(B) Parent
(C) Normal
(D) Derived
Answer: (A)

129. Which keyword prevents inheritance?
(A) stop
(B) final
(C) end
(D) private
Answer: (B)

130. Abstract class contains?
(A) only vars
(B) only static
(C) pure virtual
(D) templates
Answer: (C)

131. Which is pure virtual function syntax?
(A) virtual void f()
(B) void f() = 0
(C) virtual void f() = 0
(D) pure f()
Answer: (C)

132. inline avoids?
(A) function call overhead
(B) runtime
(C) memory
(D) compile errors
Answer: (A)

133. #include is a?
(A) function
(B) object
(C) directive
(D) macro
Answer: (C)

134. Which header defines setw()?
(A)
(B)
(C)
(D)
Answer: (A)

135. cin is an object of?
(A) iomanip
(B) file
(C) istream
(D) stdlib
Answer: (C)

136. cout is an object of?
(A) ostream
(B) istream
(C) iostream
(D) file
Answer: (A)

137. Which flushes output?
(A) cin
(B) cout
(C) endl
(D) namespace
Answer: (C)

138. Which is not fundamental type?
(A) int
(B) bool
(C) char
(D) vector
Answer: (D)

139. RTTI stands for?
(A) Run-Time Type Identification
(B) Real Time Type Info
(C) Runtime Template Input
(D) None
Answer: (A)

140. Type casting converts?
(A) values
(B) types
(C) header
(D) objects
Answer: (B)

141. Continue skips?
(A) loop
(B) iteration
(C) function
(D) object
Answer: (B)

142. Break exits?
(A) program
(B) loop
(C) class
(D) file
Answer: (B)

143. Which is not a valid loop?
(A) for
(B) foreach
(C) while
(D) do-while
Answer: (B)

144. This pointer refers to?
(A) parent
(B) base
(C) current object
(D) local var
Answer: (C)

145. Which starts C++ program?
(A) include
(B) main()
(C) header
(D) class
Answer: (B)

146. Namespace avoids?
(A) objects
(B) duplicates
(C) name conflicts
(D) errors
Answer: (C)

147. Friend functions break?
(A) polymorphism
(B) encapsulation
(C) inheritance
(D) abstraction
Answer: (B)

148. Which refers to base class?
(A) this
(B) base
(C) super
(D) ::
Answer: (D)

149. Which concept gives multiple forms?
(A) inheritance
(B) polymorphism
(C) abstraction
(D) encapsulation
Answer: (B)

150. Which is used to overload operators?
(A) function
(B) class
(C) operator keyword
(D) virtual
Answer: (C)

151. Default constructor has?
(A) parameters
(B) no parameter
(C) many parameters
(D) virtual
Answer: (B)

152. Queue follows?
(A) LIFO
(B) FIFO
(C) reverse
(D) middle
Answer: (B)

153. Stack follows?
(A) FIFO
(B) LIFO
(C) combo
(D) none
Answer: (B)

154. Which is associative container?
(A) vector
(B) set
(C) stack
(D) queue
Answer: (B)

155. Which is dynamic array?
(A) vector
(B) array
(C) list
(D) deque
Answer: (A)

156. Which is a container?
(A) vector
(B) string
(C) iostream
(D) math
Answer: (A)

157. STL has?
(A) algorithms
(B) containers
(C) iterators
(D) all
Answer: (D)

158. STL stands for?
(A) Standard Time Library
(B) Simple Template Library
(C) Standard Template Library
(D) Static Template Library
Answer: (C)

159. Template keyword?
(A) temp
(B) template
(C) typetemp
(D) generic
Answer: (B)

160. Which is not OOP concept?
(A) Object
(B) Class
(C) Compiler
(D) Inheritance
Answer: (C)

161. OOP stands for?
(A) Object Online Program
(B) Object-Oriented Programming
(C) Oriented Process
(D) None
Answer: (B)

162. Inline functions ____.
(A) decrease speed
(B) increase speed
(C) slow execution
(D) reduce overload
Answer: (B)

163. Which header includes string class?
(A)
(B)
(C)
(D)
Answer: (C)

164. Scope resolution operator?
(A) ->
(B) .
(C) ::
(D) <>
Answer: (C)

165. Which operator accesses members using pointer?
(A) .
(B) ->
(C) *
(D) ::
Answer: (B)

166. Destructor cannot be ____.
(A) private
(B) public
(C) overloaded
(D) protected
Answer: (C)

167. Constructor cannot be ____.
(A) overloaded
(B) inherited
(C) inline
(D) defined outside
Answer: (B)

168. Virtual function belongs to?
(A) Compile-time
(B) Run-time
(C) Both
(D) None
Answer: (B)

169. C++ supports ___ types of polymorphism.
(A) 1
(B) 2
(C) 3
(D) 4
Answer: (B)

170. dereference operator?
(A) *
(B) #
(C) %
(D) ~
Answer: (A)

171. Address-of operator?
(A) *
(B) &
(C) ->
(D) %
Answer: (B)

172. Which is used for pointer declaration?
(A) %
(B) *
(C) &
(D) @
Answer: (B)

173. Public members are accessible to?
(A) class
(B) object
(C) everywhere
(D) none
Answer: (C)

174. Private members are accessible to?
(A) everyone
(B) only class
(C) derived class
(D) namespace
Answer: (B)

175. Which enables class reuse?
(A) Polymorphism
(B) Inheritance
(C) Encapsulation
(D) Abstraction
Answer: (B)

176. What is abstraction?
(A) Hiding code
(B) Hiding data
(C) Hiding implementation
(D) Hiding class
Answer: (C)

177. What is a constructor?
(A) Any function
(B) Function returning int
(C) Special function with class name
(D) Virtual function
Answer: (C)

178. Which deallocates memory?
(A) delete
(B) free
(C) remove
(D) erase
Answer: (A)

179. Which is used for memory allocation?
(A) malloc
(B) calloc
(C) new
(D) alloc
Answer: (C)

180. Which cannot be overloaded?
(A) +
(B) =
(C) ::
(D) []
Answer: (C)

181. Destructor symbol?
(A) ~
(B) $
(C) #
(D) !
Answer: (A)

182. Which supports late binding?
(A) Inline
(B) Template
(C) Virtual
(D) Static
Answer: (C)

183. Which keyword creates inheritance?
(A) extends
(B) inherits
(C) public/private/protected
(D) derive
Answer: (C)

184. Default access specifier in class?
(A) public
(B) private
(C) protected
(D) internal
Answer: (B)

185. Which creates a class?
(A) struct
(B) class
(C) private
(D) namespace
Answer: (B)

186. Runtime polymorphism uses?
(A) Operator overloading
(B) Function overloading
(C) Virtual functions
(D) Templates
Answer: (C)

187. Which allows multiple functions with same name?
(A) Overloading
(B) Overriding
(C) Casting
(D) Typing
Answer: (A)

188. Which concept means binding data and functions?
(A) Abstraction
(B) Encapsulation
(C) Polymorphism
(D) Inheritance
Answer: (B)

189. Which keyword creates an object?
(A) new
(B) class
(C) object
(D) create
Answer: (A)

190. Which is a user-defined type?
(A) int
(B) float
(C) struct
(D) double
Answer: (C)

191. Which of these is a valid data type?
(A) integer
(B) var
(C) float
(D) number
Answer: (C)

192. Which operator is used for input?
(A) <<
(B) >>
(C) ->
(D) <>
Answer: (B)

193. Which operator is used for output?
(A) <<
(B) >>
(C) ::
(D) ->
Answer: (A)

194. Which header is used for cout?
(A)
(B)
(C)
(D)
Answer: (B)

195. Which is used for multi-line comments?
(A) //
(B) #
*(C) / /*
(D) \\ \\
Answer: (C)

196. Which symbol indicates a single-line comment?
(A) //
(B) /*
(C) ##
(D) %%
Answer: (A)

197. Which paradigm does C++ support?
(A) Procedural
(B) OOP
(C) Both
(D) None
Answer: (C)

198. C++ is an extension of which language?
(A) Java
(B) C
(C) Python
(D) Pascal
Answer: (B)

199. Who developed C++?
(A) Bjarne Stroustrup
(B) Dennis Ritchie
(C) James Gosling
(D) Tim Berners-Lee
Answer: (A)