Answer Posted / ravikiran(aptech mumbai)

Reaer/writer belongs to the charecter stream
I/P and O/P belongs to the byte stream

Can we create a class inside a class in java?

550

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Why do people says “java is robust”?

562

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What are the Main functions of Java?

633

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What is variable explain with example?

574

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what is optional in java 8?

567

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What are the methods used to implement for the key object in the hash map?

571

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what is inner class in java?

628

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Can we override a variable in java?

555

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What are inner classes or non static nested classes in java?

707

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What is currentthread()?

575

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Is string is a data type?

571

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What is the base class in java from which all classes are derived?

523

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How many types of design patterns are there?

533

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Can memory leak happen java?

598

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How many JVMs can run on a single machine and what is the meaning of Just-In-Time (JIT) compiler?

762

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