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JAVA OOPS INTERVIEW QUESTIONS FOR 10 YEARS EXPERIENCE HOW TO
JAVA OOPS INTERVIEW QUESTIONS FOR 10 YEARS EXPERIENCE CODE

What is the difference between default constructors, copying and constructor with parameters?.

JAVA OOPS INTERVIEW QUESTIONS FOR 10 YEARS EXPERIENCE HOW TO

How to organize access to the fields of the class?.Name the principles of OOP and tell about each.Must Read Java Interview Questions Books.Why is the clone method declared protected? What is needed to implement cloning? What is finalize? Why is it needed? What can you tell about the garbage collector and the algorithms of its work. What happens if a single class constructor is declared final? What are the features of the initialization of final variables? Does it make sense to declare the method private final? If the parent class has a method declared as private, can the heir expand its visibility? And if protected? And narrow visibility? Expanding modifiers for inheritance, overriding and hiding methods. Technical OOPS Java Interview Questions.What is volatile and transient? For what and in what cases it would be possible to use default? Is it possible to access private class variables and, if so, how? What is the difference between an abstract class and an interface, in which cases what will you use? What do you think, will there be any problems if the object that is used as a key in hashMap has a field that participates in the definition of hashCode? Are there any recommendations on which fields should be used when calculating hashCode? What happens if you redefine equals without overriding hashCode? What problems may arise?

Which method returns a string representation of an object?

Advanced Java OOPS Interview Questions And Answers.

What are the features of the hashCode and equals methods? How are the hashCode and equals methods implemented in the Object class? What rules and conventions exist to implement these methods? When do they apply? If equals () is overridden, are there any other methods that should be overridden? If you want to override equals (), which conditions must be satisfied for the overridden method? Tell us about each of the methods of the Object class. How is any custom class related to the Object class? How can I access the local variable of a method from an anonymous class declared in the body of this method? Are there any restrictions for such a variable? How from the nested class to get access to the field of the outer class? What is the difference between nested and inner classes? What do you know about nested classes, why are they used? Classification, use cases, violation of encapsulation. What are the features of creating nested classes: simple and static. What types of classes are in java (nested … etc) Why can’t I declare an interface method with a final or static modifier? What modifiers have fields and methods of interfaces by default? How does the static modifier affect a class / method / field? What are the features of initialization of final static variables? What is a static class, what are the features of its use? Is it possible to overload the static method?

JAVA OOPS INTERVIEW QUESTIONS FOR 10 YEARS EXPERIENCE CODE

What happens if an exception occurs in the static code block? To which Java constructs is the static modifier applicable? Is it possible to declare a method abstract and static at the same time? Where and what is the abstract modifier used for? What is the order of calling constructors and initialization blocks of two classes: a descendant and its ancestor? Why do we need and what are the initialization blocks? Java OOPS Interview Questions With Examples.Where can I initialize static / non-static fields? How is overriding different from overloading? What transformations are called descending and ascending? How to get access to the overridden methods of the parent class? Is it possible to narrow the access level / return type when redefining the method? Can a method take a different number of parameters (variable length arguments)? Java OOPS Interview Questions And Answers For Experienced.Java Object Oriented Programming Interview Questions.What do the keywords “this”, “super” say, where and how can they be used? Tell us about the features of the class with a single closed constructor. What modifications of the access level do you know, tell us about each of them. What is the difference between default constructors, copying and constructor with parameters? How to organize access to the fields of the class? Name the principles of OOP and tell about each. OOPS Java Interview Questions And Answers.