JAVA INTERVIEW QUESTIONS CODE

Can only operates on static variables.Īns. keyword in Java is used to indicate that a field should not be serialized.Īns. What is the use of Transient Keyword ?Īns. Storing the state of an object in a file or other medium.Ģ2. Volatile is a declaration that a variable can be accessed by multiple threads and hence shouldn't be cached.Īns. What is the use of Volatile Keyword ?Īns.

Association of function call to function definition during run time.Ģ0. Its an operation that initializes the object.Īns. Abstract classes have a body ( member elements ) where as Interfaces just have methods and static member declarations.Īns. Difference between Interfaces and Abstract classes ?Īns. Has a relationship vs Is a relationship.Īns. Difference between Composition and Inheritence ?Īns. Extending Thread class and implementing runnable interface.ġ5.

Static ( function overloading ) and Run time ( Virtual functions )Īns. What are the types of Polymorphism in Java ?Īns. Mechanism by which Java reclaims the memory inaccessible by the application.ġ3. Describe Garbage Collection in Java ?Īns. Class is a template using which objects are created in memory.ġ2. Difference between class and objects ?Īns. Vectors are synchronized whereas Array lists are not.ġ1. Difference between Vector and ArrayList ?Īns. Accessible only by the objects in the same package.ġ0.

JAVA INTERVIEW QUESTIONS CODE

Managing exclusive access of the code block to single thread at a time to maintain its integrity.Īns. What is role of Synchronization in Java ?Īns. Protected - Accessible from anywhere within same package.Ĩ. Private - Not accessible outside object scope. Difference between Private, Public and Protected ?Īns. Sets doesn't contain duplicates whereas multiset can have duplicates. Sets - There is no relevance of sequence and index.

Lists - Members are stored in sequence in memory and can be accessed through index. Difference between List, Sets and Maps ?Īns. TreeMap stores the Keys in order whereas HashMap stores the key value pairs randomly.Ħ. They are different the way they are stored in memory. Difference between TreeMap and HashMap ?Īns. Simple Inner Class, Local Inner Class, Anonymous Inner Class, Static Nested Inner Class.ĥ. Overriding - Overriding the Definition of base class in the derived class.Īns. Overloading - Similar Signature but different definition, like function overloading. Difference between Overloading and Overriding ? Abstract classes are only meant to be sub classed and not meant to be instantiated whereas concrete classes are meant to be instantiated.ģ. Difference between Abstract and Concrete Class ?Īns. Abstraction, Encapsulation, Inheritance and Polymorphism.Ģ.

Java interview questions