Object Oriented Programming MCQs

Page No. 12

If constructors of a class are defined in private access, then __________


aThe class can’t be inherited

✓


bThe class can be inherited

✖


cInstance can be created only in another class

✖


dInstance can be created anywhere in the program

✖


View Answer The class can’t be inherited

When is the static constructor called?


aAfter the first instance is created

✖


bBefore default constructor call of first instance

✖


cBefore first instance is created

✓


dAt time of creation of first instance

✖


View Answer Before first instance is created

Default constructor initializes all data members as ___________


aAll numeric member with some garbage values and string to random string

✖


bAll numeric member with some garbage values and string to null

✖


cAll numeric member with zero and strings to random value

✖


dAll numeric member with zero and strings to null

✓


View Answer All numeric member with zero and strings to null

Within a class, only one static constructor can be created.


aTrue

✓


bFalse

✖


cA & B

✖


d None of these

✖


View Answer True

Which among the following is true for static constructor?


aStatic constructors are called with every new object

✖


bStatic constructors are used initialize data members to zero always

✖


cStatic constructors can’t be parameterized constructors

✓


dStatic constructors can be used to initialize the non-static members also

✖


View Answer Static constructors can’t be parameterized constructors

When and how many times a static constructor is called?


aCreated at time of object destruction

✖


bCalled at first time when an object is created and only one time

✓


cCalled at first time when an object is created and called with every new object creation

✖


dCalled whenever an object go out of scope

✖


View Answer Called at first time when an object is created and only one time

Why do we use static constructors?


aTo initialize the static members of class

✓


bTo initialize all the members with static value

✖


cTo delete the static members when not required

✖


dTo clear all the static members initialized values

✖


View Answer To initialize the static members of class

Which type of constructor can’t have a return type?


aDefault

✖


bParameterized

✖


cCopy

✖


dConstructors don’t have a return type

✓


View Answer Constructors don’t have a return type

Which among the following is true?


aDefault constructor can’t be defined by the programmer

✖


bDefault parameters constructor isn’t equivalent to the default constructor

✖


cDefault constructor can be called explicitly

✓


dDefault constructor is and always called implicitly only

✖


View Answer Default constructor can be called explicitly

Which specifier applies only to the constructors?


a Public

✖


bProtected

✖


cImplicit

✖


dExplicit

✓


View Answer Explicit

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