Why do we need hashmap in java?
What is a vararg?
What is stream api in java8?
What are the differences between this and super keyword?
What are the allowed, non-Unicode letter characters that can be used as the first character of an identifier?
According to java operator precedence, which operator is considered to be with highest precedence?
Can we override singleton class?
What is garbage collection? Can it be forced to run?
What is Java Reflection API? Why it’s so important to have?
What are different types of control structures?
Is singleton a bad practice?
Why pass by reference is not possible in java?
What is a singleton class in Java? And How to implement a singleton class?