61⟩ When we create a class, we are creating a new data typeA) TrueB) False
well, it isn't /quite/ the same as a struct. A class can contain methods as well as state, remember...
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76 Java Classes Questions And Answers
62⟩ Explain how to declare and defile a final class without use of final keyword?
By making constructor as 'private', we can make a final class.
63⟩ A class is declared by use of the ________ keyword.A) ObjectB) ClassC) InstanceD) None of the above
D)None of the above.This is because the class is a valid keyword and not Class.This might catch inexperienced programmers who are taught the first letter of the class by convention is capital.
64⟩ The new operator dynamically allocates ________ for an object and returns a reference to it.A) ClassesB) VariablesC) MemoryD) None of the Above
It always allocates memory...
65⟩ The variable receiving the value returned by a method must also be compatible with the return type specified for the method.A) TrueB) False
it is True the avriable receiving the value must be compatible.
66⟩ Static and Non-Static are the two types of nested classesA) TrueB) False
true.....class declared with static called static inner class....with out static called non static inner class..
67⟩ Java allows objects to initialize themselves when they are created using _________A) ArgumentsB) ClassesC) ConstructorsD) Parameters
Ans is constructer.
B'coz When a object is created following things are happen:
1) Memory gets allocated to the object
2) Constructer gets called.
3) In constructer the object gets initialize.
i think this will be sufficient to clear the topic..
68⟩ in Java, all class objects need not be dynamically allocatedA) TrueB) False
I think it is true. Because, we use initalize some variables which are not dynamic.
For eg: int i = 10;
69⟩ In this example class-var = new classname( ); The classname is the name of the class that is being instantiated.A) TrueB) False
whan we create an object so code are classname obj=new classname();classname is name of the classobj is objectnew is create new instances of class classnameso that ans is true...........what u say
70⟩ Tell me Is it possible to declare an anonymous class while implementing an interface?
Interface i = new Interface(){/* Code}The above statement creates an instance of a class which implements the Interface "Interface". As name of class is not specified hence it is anonymous.
71⟩ Explain what does enumeration means when talking about the 9th Amendment
Please share your answers.
72⟩ Explain when we are overloading or overriding the methods how we want to take care about the acess specifiers?
When we override a method in the child class, that method sould not be a private in parent class, but that method should be public or protected or default, those methods should have the same signature.
But we can overload the method within the same class or in the child class but they have some difference in having no of arguments or type of arguments. if we overload the method within the class we can use any access specifier, if we overload in child class dont use private.
73⟩ What is enumeration?
public interface Enumeration . An object that implements the Enumeration interface generates a series of elements, one at a time. Successive calls to the nextElement method return successive elements of the series.
74⟩ How to call two interfaces in one interface?
You can not call 2 interface in interface but you can extend interfaces in your interface.Example :
Interface I1{..}Interface I2 extends I1{..}Interface I3 extends I2{}
75⟩ The methods and variables defined within a class are called members of the classA) TrueB) False
True
76⟩ It is possible to define a class within another class; such classes are known as ____________A) Nested Classes
this is called as Inner Class also
