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Interview Questions and Answers - Order By Rating | |||||||||||
Ans. Runtime Polymorphism | |||||||||||
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Like Discuss Correct / Improve  static class   static vs singleton   java   oops   objects  Runtime Polymorphism | |||||||||||
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Why do we need Inner classes ? Cant we just work with outer classes wherever we implement Inner classes ? | |||||||||||
Let's suppose we have an to destroy objects, Design a program to implement garbage collection ? | |||||||||||
How can we create objects if we make the constructor private ? | |||||||||||
Difference Between this() and super() ? | |||||||||||
Please specify in what sequence the objects of following classes will be created ? Session , SessionFactory, Query , Configuration | |||||||||||
Which interface provides the capability to store objects using a key-value pair? | |||||||||||
What is an Object ? | |||||||||||
How many SessionFactory and Session objects are created ? | |||||||||||
Can we declare Entity class as final ? | |||||||||||
What are stateless objects ? How are they different from immutable objects ? Which of these two is thread safe ? | |||||||||||
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Ans. Static polymorphism is the polymorphic resolution identified at compile time and is achieved through function overloading whereas dynamic polymorphism is the polymorphic resolution identified at runtime and is achieved through method overriding. | |||||||||||
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Like Discuss Correct / Improve  static polymorphism  object oriented programming (oops)  oops concepts   dynamic polymorphism  object oriented programming (oops)  oops concepts   polymorphism  object oriented programming (oops)  oops concepts   overloading   overriding   broadridg Asked in 1 Companies basic   frequent | |||||||||||
Related Questions | |||||||||||
What are points to consider in terms of access modifier when we are overriding any method? | |||||||||||
What is Polymorphism in Java ? | |||||||||||
If everything is an object , Cant we declare every object as Object obj = new String(); | |||||||||||
Why do we need polymorphism in Java ? | |||||||||||
How does java identifies which method to be called in method overriding or runtime polymorphism, when both methods share the same name and signature ? | |||||||||||
Shouldn't we make a class with all static members is its just expected to be executed as a standalone program with just one thread. Moreover Lets assume that there is no runtime Polymorphism required and there is no need for serialization ? | |||||||||||
Is this Polymorphism ? Map<String, List<String>> inventoryManagerCountMap = new HashMap<String, ArrayList<String>>(); | |||||||||||
When are static and instance methods resolved ? During compile time or Runtime ? | |||||||||||
Which of the following is not the difference between Singleton and Static class ( Class with static members only ) ? | |||||||||||
Which of the following do you think is the primary reason you would never use a static class even the application doesn't need multiple requests or threads ? a. Serialization b. Runtime Polymorphism c. Lazy Loading d. Memory | |||||||||||
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Ans. It could be worthy to move a method to util class if the method needs to be shared, doesn't require polymorphic behavior and need not be overridden in special cases. Don't belong to one group through is-a relationship ( You can share through parent class method ) Don't implement a specific interface ( java 8 default methods ) Doesn't involve complex computing as you will be loosing the benefit of object state with just static method. Doesn't require polymorphic behavior as static methods don't participate in runtime polymorphism. | |||||||||||
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Like Discuss Correct / Improve  utility classes   util classes   static methods   application design   rare | |||||||||||
Related Questions | |||||||||||
Name few Java util classes that were introduced with Java 7 ? | |||||||||||
Name few Java Util classes introduced with Java 8 ? | |||||||||||
What are Util Classes ? What are its advantages ? | |||||||||||
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