Constructors MCQ

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

• For constructor overloading, each constructor must differ in ___________ and __________
  ক

  Number of arguments and type of arguments

  খ

  Number of arguments and return type

  গ

  Return type and type of arguments

  ঘ

  Return type and definition
• Which among the following helps to create a temporary instance?
  ক

  Implicit call to a default constructor

  খ

  Explicit call to a copy constructor

  গ

  Implicit call to a parameterized constructor

  ঘ

  Explicit call to a constructor
• If the object is passed by value to a copy constructor?
  ক

  Only public members will be accessible to be copied

  খ

  That will work normally

  গ

  Compiler will give out of memory error

  ঘ

  Data stored in data members won’t be accessible
• Which among the following is true for copy constructor?
  ক

  The argument object is passed by reference

  খ

  It can be defined with zero arguments

  গ

  Used when an object is passed by value to a function

  ঘ

  Used when a function returns an object
• If class C inherits class B. And B has inherited class A. Then while creating the object of class C, what will be the sequence of constructors getting called?
  ক

  Constructor of C then B, finally of A

  খ

  Constructor of A then C, finally of B

  গ

  Constructor of C then A, finally B

  ঘ

  Constructor of A then B, finally C
• Default constructor must be defined, if parameterized constructor is defined and the object is to be created without arguments.
  ক

  True

  খ

  False
• If a programmer defines a class and defines a default value parameterized constructor inside it. He has not defined any default constructor. And then he try to create the object without passing arguments, which among the following will be correct?
  ক

  It will not create the object (as parameterized constructor is used)

  খ

  It will create the object (as the default arguments are passed)
• How many types of constructors are available for use in general (with respect to parameters)?
  ক

  2

  খ

  3

  গ

  4

  ঘ

  5
• Which among the following is correct?
  ক

  class student{ public: int student(){} };

  খ

  class student{ public: void student (){} };

  গ

  class student{ public: student{}{} };

  ঘ

  class student{ public: student(){} };
• Which among the following is called first, automatically, whenever an object is created?
  ক

  Class

  খ

  Constructor

  গ

  New

  ঘ

  Trigger