Answer Posted / ravikiran(aptech mumbai)

List interface provides classes and interfaces to save the
objects incliding duplicates.

Is list thread safe in java?

694

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Is java a utf 8 string?

741

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How do you read a char in java?

690

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What are constants and how to create constants in java?

735

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What is JDBC Driver interface?How can you retrieve data from the ResultSet

1761

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What is package protected in java?

714

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Which is bigger float or double java?

734

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what is collatration?

3013

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Explain about wait() method?

773

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Can a class with private constructor be extended?

688

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Explain the difference between runnable and callable interface in java?

799

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What is numeric data type?

734

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What is a concrete classes? Is Java object class is concrete class?

735

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List implementations of list interface?

782

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Can we use synchronized block for primitives?

814

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