C++ Important Questions

001.Q> Who is the developer of C++

1. James Gosling
2. Bjarne Stroustrup
3. Mark
4. None

002.Q> C++ is a ___ Language

1. Assembly
2. Procedural
3. OPP
4. All of Above

003.Q> C++ programs are converted into machine language with the help of —  

1. Interpreter
2. Assembler
3. Linker
4. Compiler

004.Q> Pre-processor commands starts with ____

1. *
2. &
3. #
4. %

005.Q> How many key words in C++ ?

1. 32
2. 48
3. 63
4. None

006.Q> In C++, Const is a ___

1. Keyword
2. variable
3. function
4. datatype

007.Q> In C++ every statements ends with _____

1. colon (:)
2. comma (,)
3. dot (.)
4. Semicolon (;)

008.Q> You can never use address of ________ variable?

1. global
2. static
3. auto
4. register

009.Q> The default storage for local variable is _____

1. auto
2. static
3. extern
4. register

010.Q> How many loops are in C++

1. 0
2. 3 (for,dowhile, while)
3. 1
4. 2

011.Q> In c++, we used for Input/output —

1. input/output
2. printf/scanf
3. in/out
4. cin /cout (Console input /output)

012.Q> C++ is am extension to _____ programming language

1. pascal
2. java
3. C (Super set of c Language)
4. B

013.Q> In C++ programming endl is used for ________

1. Form feed
2. Line brake
3. vertical tab
4. none

014.Q> C++ programming is used to develop _______

1. Games
2. Desktop apps
3. OS
4. All of above

015.Q> Which of the following is a abstract Datatype?

1. Int
2. float
3. string
4. class

016.Q> Which operator is overloaded for a cout object?

1. <<
2. >> 
3. < 
4. > 

017.Q> Which Datatype is best suited to represent logical values?

1. int
2. char
3. Boolean
4. float

018.Q> Identify the User defined types___

1. enumeration
2. classes
3. Both a & b
4. int

019.Q> While loop is a _______ controlled loop

1. count
2. exit
3. entry
4. none

020.Q> do-while is a _______ controlled loop

1. count
2. exit
3. entry
4. none

021.Q> for loop is a ___ controlled loop

1. count
2. exit
3. entry
4. none

022.Q> C++ is a __ programming language

1. platform dependent (its runs only on the specified system where program is written)
2. platform independent
3. os
4. none

023.Q> In which year, C++ was developed?

1. 1980’s                                 (1979)                  
2. 1972
3. 1998
4. 2000

024.Q> In C++ ‘&’ is called___

1. Value
2. Address of operator
3. And operator
4. none

025.Q> In C++ ‘&&” called ___

1. Logical AND
2. Logical OR
3. Logical Not
4. none

026.Q> How many character are  specified in the ASCII scheme?

1. 64
2. 128
3. 256
4. none

027.Q> How many types of comments are there in C++?

1. one
2. two
3. three
4. four

028.Q> What is the default return value of functions?

1. int
2. char
3. void
4. float

029.Q> Function overloading is also similar to___

1. operator overloading
2. constructor overloading
3. Destructor overloading
4. none

030.Q> Which keyword is used to define the macros in C++?

1. macro
2. define
3. #define
4. #typedef

031.Q> How many types of macros are there in C++?

1. one
2. two
3. three
4. four

032.Q> How many types of Exception Handling in C++?

1. one
2. two
3. three
4. four

033.Q> Which of the following is logical NOT operator?

1. &&
2. ||
3. !
4. not

034.Q> How many logical operator are their in C++?

1. 0
2. 1
3. 2
4. 3

035.Q> “?:” called _______

1. Arithmetic operator
2. Conditional /Ternary
3. Assignment Operator
4. none

036.Q> In C++ programming : called____

1. colon
2. comma
3. semicolon
4. dot

037.Q> What is the name of  : : in C++?

1. Scope resolution Operator
2. colon
3. comma
4. none

038.Q> Which of the following approach is adapted by C++

1. Top-Down
2. Bottom-up (Takes bottom class takes the uper class properties
3. Right-left
4. Left-Right

039.Q> Which loop executes at once even the given condition is false.

1. while
2. do-while
3. for
4. for-each

040.Q> In C++ programming array index is always starts

1. 0
2. 1
3. 2
4. 3

041.Q> Array is a collection of ____ value

1. Dis-similar
2. Similar
3. Hetrogenous
4. None

042.Q> Which of the following is not a jumping statement?

1. Break
2. Continue
3. goto
4. cout

043.Q> The use of break statement in a switch statement is ___

1. optional
2. compulsory
3. to check an error
4. none

044.Q> In c++ programming “\v” is used for____

1. Form feed
2. Line brake
3. Vertical tab
4. Alarm

045.Q> In C++ comma(,) is a ____

1. separator
2. loop
3. operator
4. none

046.Q> If an array is declared as int arr[2][2], how many elements can it store?

1. 0
2. 2
3. 4
4. 8

047.Q> int arr[3], what is the name of  [ ]?

1. Increment operator
2. Logical operator
3. subscript operator
4. None

048.Q> The size of int arr[5] is ___

1. 10 bytes
2. 5 bytes
3. 2 bytes
4. none

049.Q> Which is the following is the valid array declaration?

1. int a[0];
2. int a[5]={1,2,3,4,5,6,7};
3. int a[ ];
4. int a[0] =3;

050.Q> Array is the example of ___

1. Linear data structure
2. dynamic
3. non linear data structure
4. none

051.Q> Pointer variables holds ___

1. address = another variable
2. value
3. address
4. all

052.Q> What is the right way to initialize array

1. int a[5]={1,2,3}; [memory waste – only 3 values are given]
2. int a[5]={1,2,3,4,5};
3. int a[2]=3;
4. All of the above

053.Q> Array elements are always stored in ________ memory location

1. Sequential
2. Random
3. Dynamic
4. None

054.Q> String always ends with ___

1. null character
2. semicolon
3. colon
4. comma

055.Q> In C++ programming strlen ( ) function is used for ___

1. find string length
2. concat two string
3. Copy string
4. None

056.Q> Which of the following is string copy function?

1. strcpy()
2. strrev()
3. strcat()
4. strlen()

057.Q> Which function concat two string?

1. strcpy()
2. strrev()
3. strcat()
4. strlen()

058.Q> The keyword used to define a structure is

1. stru
2. st-struct
3. structure
4. struct

059.Q> The structure definition ends by a ________

1. :
2. ;
3. ::
4. none

060.Q> Which operator connects the structure name to its member name ?

1. _
2. ,
3. .
4. ;

061.Q> The size of a union is determined by the size of the ____

1. First member
2. Biggest member
3. last member
4. none

062.Q> How many union members accessed at a time?

1. only one
2. all members
3. two
4. all of the above

063.Q> Pointer always work with _____operator

1. &
2. *
3. both a & b
4. none

064.Q> Which of the following is not a features of C++?

1. OOP
2. DMA
3. Simple
4. Platform Independent

065.Q> A token is _____________

1. keyword
2. An Identifier
3. Smallest Unit of program
4. operator

066.Q> ____functions can’t use recursion

1. parameterized
2. inline
3. overloaded
4. friend

067.Q> Which of the following is allowed in a C++ arithmetic –

1. { }
2. [ ]
3. ( )
4. None

068.Q> While loop checks the condition on ____

1. Top
2. Bottom
3. Middle
4. None

069.Q> cout is a /an ____

1. operator
2. object
3. function
4. Macro

070.Q> A keyword is ___

1. An identifier
2. In lower case instructions only
3. Reserved word
4. none

071.Q> A member function can be declared static if it does not access ____ members

1. private
2. public
3. non – static
4. None

072.Q> A character variable can at a time store ____

1. 1 character
2. 8 character
3. 256 character
4. none

073.Q> Header files have the file extension____

1. .h
2. .cu
3. .cpps
4. .head

074.Q> Scope resolution operator is ___

1. :
2. ,
3. .
4. ::

075.Q> I want to read data from the file, which stream I have to use?

1. ifstream
2. ofstream
3. stream
4. Both A & B

076.Q> A set of arithmatic operators are —

1. &&, ||, !
2. ==, !=, >, <, >=, <=
3. +. -, *, /, %
4. All of above

077.Q> Which operator has the lowest precedence?

1. size of
2. unary
3. assignment
4. comma

078.Q> Every function in C++ is followed by_____

1. { }
2. ( )
3. [ ]
4. none

079.Q> ______ is a way of combining data with function into an object.

1. Object
2. Encapsulation
3. Overload
4. Polymorphism

080.Q> The minimum value that an integer constant can have is _____

1. 32767
2. 32768
3. -32767
4. -32768

081.Q> What is the range of integer datatype?

1. -32768 to 32767
2. 0 to 255
3. -127 to 128
4. -32767 to 32768

082.Q> Which of the following mode declaration is used in c++ to open a file for input?

1. ios::ap
2. in::ios
3. ios::in
4. ios::file                                

083.Q> The order of evaluation of following expression A+B-C*D/E will be–

1. *, /, -, +
2. +, -, *, /
3. *, /, +, –
4. All of these

084.Q> Assignment operator is —

1. =
2. ++
3. << 
4. ==

085.Q> A set of relational operator is —-

1. +, -, *, /, %
2. ==, !=, <, >, <=, >=
3. &&, ||, !
4. =

086.Q> A set of conditional/ternary  operator is ______

1. << 
2. ::
3. ? :
4. >> 

087.Q> Which of the following is known as insertion operator —

1. ^
2. v
3. <<
4. >> 

088.Q> Which of the following is extraction opearator?

1. ^
2. v
3. << 
4. >>

089.Q> Which one is not a valid relational operator?

1. ==
2. =>
3. >=
4. <=

090.Q> Which symbol represent for logical AND.

1. ||
2. !
3. &
4. &&

091.Q> Which of the following is output statement in C++?

1. cin
2. cout
3. output
4. result

092.Q> To calculate remainder in C++, we use _____

1. /
2. &
3. %
4. =>

093.Q> To increase the value of ‘a’ by one which of the following statement is wrong?

1. a++
2. a=a+1
3. a+=1
4. a+1=>a

094.Q> What will be the output of the following condition statement?

int a=15>=15?15:16

1. 16
2. 15
3. 31
4. none

095.Q> Which of the following is input statement in c++?

1. cin
2. cout
3. input
4. get

096.Q> A floating point variable contains___

1. Both integral and fractional part
2. double
3. only fractional
4. none

097.Q> A function which calls itself called___

1. friend
2. inline
3. recursive
4. main

098.Q> A data structure which contains different datatypes values is called____

1. Array
2. string
3. union
4. structure

099.Q> In which LAB was developed C++?

1. Bell Lab
2. ANSI
3. SDLC
4. IBM

100.Q> What was the name of C++ earlier?

1. C with classes
2. cpp
3. c++
4. ++c

101.Q> OOP stands for___

1. object oriented programming system
2. object object programming
3. OOP
4. none

102.Q> what is the size of int datatype in C++?

1. 2
2. 4
3. Both A & B
4. None

103.Q> ASCII value of ‘\0’ (null character) is __

1. 0
2. 128
3. 255
4. -128

104.Q> In C++, Range of signed char?

1. 0 to 255
2. -128 to 127
3. 127 to -128
4. 0 to 127

105.Q> In C++, Range of un-signed char?

1. 0 to 255
2. -128 to 127
3. 127 to -128
4. 0 to 127

106.Q> Example of pre-increment operator –

1. +a
2. a++
3. –a
4. ++a

107.Q> Which of the following will not return the value?

1. empty
2. null
3. int
4. void

108.Q> The execution & endling of C++ program begin from ___

1. start
2. new( )
3. main( )
4. sqrt( )

109.Q> Correct syntax to create a single line comment

1. //comment
2. /comment
3. comment//
4. none

110.Q> Comments are used to —-

1. make the program faster
2. make error free program
3. To help other’s read nad understand the program
4. None

111.Q> How many way we can apply comment in C++?

1. 0
2. 1
3. 2
4. 3

112.Q> Which of the following storage class have global visibility

1. auto
2. break
3. return
4. extern

113.Q> main () is a / an ____

1. keyword
2. function
3. object
4. all

114.Q> cin and cout represents ________ header file

1. math.h
2. stdlib.h
3. iostream.h
4. string.h

115.Q> How many types of macro in C++

1. 0
2. 1
3. 2 (object/function macro)
4. 3

116.Q> Which of the following is the example of function macro?

3. #define_m1(r) (3.14)
4. #define
5. #define A 14
6. none

117.Q> which of the following is the example of object macro?

3. #define_m1(r) (3.14)
4. #define
5. #define A 14
6. none

118.Q> Which block should be placed after try block?

1. catch
2. throw
3. either catch or throw
4. none

119.Q> How many parameters does the throw expression can have?

1. 1
2. 2
3. 3
4. 4

120.Q> Which is used to check the error in the block in exception handling?

1. try
2. catch
3. throw
4. handler

121.Q> Where are the strings stored?

1. stack
2. heap
3. Both a & b
4. block

122.Q> Which is used to create a pure virtual function?

1. $
2. %
3. !
4. =0

123.Q> What is meant by polymorphism?

1. Class having many forms
2. Class having only single form
3. Class having two forms
4. Class having empty

124.Q> What does derived class doesn’t inherit from base class?

1. constructor
2. destructor
3. friends
4. All of above

125.Q> How to declare a template?

1. temp
2. tem
3. Template<>
4. Template()

126.Q> How many types of templates in C++

1. one
2. two
3. three
4. Both a & c

127.Q> Which is used to define a reference variable?

1. &
2. $
3. #
4. *

128.Q> What does the reference provide?

1. Alternate name for the class
2. Alternate name for the function
3. Alternate name for the variable
4. Alternate name for the pointer

129.Q> What is the difference between references and pointers?

1. Both are similar
2. References are an alias for a variable where as pointer stores the address of variable.
3. References stores address of variables where as pointer points to variable
4. Both b & c

130.Q> Which of the following function must used reference?

1. Default constructor
2. Parameterized constructor
3. Copy Constructor
4. destructor

131.Q> Exceptions are also called____

1. compile time error
2. Runtime error
3. Logical Error
4. Syntax Error

132.Q> How many types of constructor are their in C++?

1. 1
2. 2
3. 3
4. 4

133.Q> How many parameters does required default constructor ?

1. 0
2. 1
3. 2
4. 3

134.Q> C++ class holds ____

1. data
2. functions
3. Both A & B
4. none

135.Q> Which of the following is not a type of constructor?

1. operator overloading
2. default
3. parametrized
4. copy

136.Q> Which of the following is a valid class declaration?

1. class A{ }
2. class B { } ;
3. class { }
4. class A [ ];

137.Q> The data member & member functions of a class are by default____

1. protected
2. public
3. private
4. struct

138.Q> Which of the following item is used for a function defined inside a class?

1. member variable
2. member function
3. class function
4. none

139.Q> Inline function are invoked at the time of ___?

1. runtime
2. compile time
3. both
4. none

140.Q> A member function that is automatically invoked at the time of object declaration is called___

1. initializer
2. object creator
3. constructor
4. All of above

141.Q> Which of the following concepts determining at runtime what method to invoke?

1. Data hiding
2. Dynamic typing
3. Dynamic binding
4. Dynamic loading

142.Q> If class X inherits from class Y, then Y is called ___

1. super class
2. sub class
3. abstract
4. none

143.Q> An instance of a class is called_____

1. private
2. object
3. public
4. none

144.Q> Destructor has the same name as the constructor and it is preceded by___

1. !
2. @
3. #
4. ~A []

145.Q> In protected inheritance, A public data member of the class will be treated as a ___

1. public
2. private
3. protected
4. none

146.Q> Base class is ____

1. Parent class
2. Derived Class
3. Child Class
4. Nested Class

147.Q> Which of following operator can’s be overloaded?

1. ::
2. size of
3. ?:
4. All of these

148.Q> Which of the following type of class allows only one object of it created?

1. Virtual Class
2. Singleton class
3. friend class
4. none

149.Q> A class which contain at least one pure virtual function called____

1. Abstract class
2. base class
3. derived class
4. singleton class

150.Q> Which of the following not a member of class ?

1. inline function
2. virtual function
3. constructor
4. friend function

151.Q> Which of the following can’t be inherited from the base class?

1. constructor
2. Friend
3. Both A & B
4. None

152.Q> Destructor is a ___

1. Member function
2. overloaded
3. Constructor
4. none

153.Q> Which of the following provides code reusability

1. inheritance
2. abstraction
3. encapsulation
4. polymorphism

154.Q> In c++ features of oops are ___

1. inheritance
2. encapsulation
3. polymorphism
4. All of these

155.Q> How many ways to perform polymorphism?

1. 0
2. 1
3. 2
4. 3

156.Q> Destructor has the same name as constructor and it is preceded by____

1. !
2. ~
3. #
4. ?

157.Q> Wrapping data & function is a single unit is known as___

1. Abstraction
2. Encapsulation
3. Polymorphism
4. none

158.Q> Which of the following class allows only to create single object?

1. Friend class
2. Abstract class
3. Singleton class
4. virtual class

159.Q> What is the other name used for functions inside a class?

1. Member variable
2. Member function
3. Class function
4. Data Member

160.Q> How run time polymorphism are implemented in C++?

1. Using inheritance
2. Using Virtual function
3. Using templates
4. Both a & b

161.Q> In OOP abstraction refers to____

1. Hiding the details
2. Showing only essential info of the application
3. Both a & b
4. Reuse once written code again and again

162.Q> How many types of templates in C++

1. 0
2. 1
3. 2
4. 3

163.Q> Which of the following is the valid declaration of class template

1. template class A {}
2. template {}
3. Template  class A{…..}
4. none

164.Q> In base class & derived class function with same signature is called____

1. overloading
2. overriding
3. data hiding
4. none