C++ MCQ

Test your knowledge with important C++ MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more C++ MCQs at Bissoy

• Which of the following is not the member of class?
  ক

  Virtual function

  খ

  Static function

  গ

  Friend function

  ঘ

  Const function
• Which of the following is not a correct variable type?
  ক

  real

  খ

  char

  গ

  float

  ঘ

  double
• Values that are used to end loops are referred to as _____ values.
  ক

  stop

  খ

  sentinel

  গ

  end

  ঘ

  finish
• Which of the following type casts will convert an Integer variable named amount to a Double type ?
  ক

  (int to double) amount

  খ

  int (amount) to double

  গ

  int to double(amount)

  ঘ

  (double) amount
• Where does the allocaters are implemented?
  ক

  Template library

  খ

  Standard library

  গ

  C++ code library

  ঘ

  None of these
• What is the kind of execution does sequence point allow?
  ক

  Non-overlap

  খ

  Overlap

  গ

  Concurrent

  ঘ

  None of these
• How many parameters are present in mismatch method in non-sequence modifying<br /> algorithm?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• How the member functions in the container can be accessed?
  ক

  Iterator

  খ

  Indirect

  গ

  Both a & b

  ঘ

  None of these
• Which is best for coding the standard libary for c++?
  ক

  no trailing underscores on names

  খ

  complex objects are returned by value

  গ

  have a member-swap()

  ঘ

  All of the mentioned
• What of the following describes protected access specifier?
  ক

  The variable is visible only outside inside the block

  খ

  The variable is visible everywhere

  গ

  The variable is visible to its block and to it\u2019s derived class

  ঘ

  None of these
• Which design patterns benefit from the multiple inheritance?
  ক

  Adapter and observer pattern

  খ

  Code pattern

  গ

  Glue pattern

  ঘ

  None of these
• Where does the standard exception classes are grouped?
  ক

  namespace std

  খ

  error

  গ

  catch

  ঘ

  none of these
• Why is it expensive to use objects for exception?
  ক

  Exception object is created only if an error actually happens

  খ

  Because of execution time

  গ

  Memory space involved in creating an exception object

  ঘ

  None of the mentioned
• Which operator is used in catch-all handler?
  ক

  ellipses operator

  খ

  ternary operator

  গ

  string operator

  ঘ

  unary operator
• What are the operators available in dynamic memory allocation?
  ক

  new

  খ

  delete

  গ

  compare

  ঘ

  both a & b
• Where does the exception are handled?
  ক

  inside the program

  খ

  outside the regular code

  গ

  both a & b

  ঘ

  none of these
• Where does the exceptions are used?
  ক

  Exceptions are used when postconditions of a function cannot be satisfied.

  খ

  Exceptions are used when postconditions of a function can be satisfied.

  গ

  To preserve the program

  ঘ

  none of these
• How many types of constructor are there in C++?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• What does inheriatance allows you to do?
  ক

  create a class

  খ

  access methods

  গ

  create a hierarchy of classes

  ঘ

  None of the mentioned
• How many ways of reusing are there in class hierarchy?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• A special member function of a class, which is invoked automatically whenever an object goes out of the scope is called
  ক

  Constructor

  খ

  Destructor

  গ

  Friend function

  ঘ

  None of the above
• How many ways are there to initialize int with a constant?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• Which among the following are not the c++ tokens
  ক

  Identifiers

  খ

  keywords

  গ

  Strings

  ঘ

  None
• What is the general syntax for accessing the namespace variable?
  ক

  namespaceid::operator

  খ

  namespace,operator

  গ

  namespace#operator

  ঘ

  none of the mentioned
• What is the output of this program ? #include <br /> using namespace std;<br /> int n(char, int);<br /> int (*p) (char, int) = n;<br /> int main()<br /> {<br /> (*p)('d', 9);<br /> p(10, 9);<br /> return 0;<br /> }<br /> int n(char c, int i)<br /> {<br /> cout &lt;&lt; c &lt;&lt; i;<br /> return 0;<br /> }
  ক

  d99

  খ

  d9d9

  গ

  d9

  ঘ

  compile time error
• What are the mandatory part to present in function pointers?
  ক

  &

  খ

  retrun values

  গ

  data types

  ঘ

  none of these
• What is the default return type of a function ?
  ক

  int

  খ

  void

  গ

  float

  ঘ

  char
• What is the output of this program? #include <iostream><br /> using namespace std;<br /> void fun(int x, int y)<br /> {<br /> x = 20;<br /> y = 10;<br /> }<br /> int main()<br /> {<br /> int x = 10;<br /> fun(x, x);<br /> cout << x;<br /> return 0;<br /> }
  ক

  10

  খ

  20

  গ

  compile time error

  ঘ

  none of these
• What is the output of this program? #include <iostream><br /> using namespace std;<br /> struct sec {<br /> int a;<br /> char b;<br /> };<br /> int main()<br /> {<br /> struct sec s ={25,50};<br /> struct sec *ps =(struct sec *)&s;<br /> cout << ps->a << ps->b;<br /> return 0;<br /> }
  ক

  252

  খ

  253

  গ

  254

  ঘ

  262
• Which of the following is a properly defined structure?
  ক

  struct {int a;}

  খ

  struct a_struct {int a;}

  গ

  struct a_struct int a;

  ঘ

  struct a_struct {int a;};