Compare Mutex and Semaphore in java.
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Is map sorted in java?
Why there are some null interface in JAVA? What does it mean? Give some null interface in JAVA?
give an example for encapsulation?
What is a ternary operator in java? What is an interface?
which one the better thread emplemented thread or extended ?
What are the types of loops in Java, and how are they used?
Which collection is sorted in java?
What is the difference between static (class) method and instance method?
How does map works in java?
1.IN CASE OF DYNAMIC METHOD DISPATCH WHY WE USE REFERENCE VARIABLE,WE CAN USE THE DIFFERENT DEFINED OBJECT DIRECTLY TO ACCESS THE DATA MEMBER AND MEMBER FUNCTION OF THAT RESPECTIVE CLASS?WHAT IS THE MAIN FUNCTION OF "REFERENCE VARIABLE" HERE?
Can an unreferenced object be referenced again?
"We cannot create an object of interface but we can create a variable of it". Discuss the statement with the help of an example. (Plz help us to provide immediately.)
Core Java 
