Should you start out with sharded or with a non-sharded mongodb environment?

1

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What happens when a shard is down or slow when querying?

1

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Explain different ways of creating a thread. Which one would you prefer and why?

1043

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What are the differences between wait() and sleep()?

1020

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What is the purpose of garbage collection in java? When is it used?

1052

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What are the principle concepts of oops?

965

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How does hashmap work in java ?

1063

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What are the differences between string, stringbuffer and stringbuilder?

1040

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What is an immutable object? How do you create one in java?

1072

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How do you create immutable object in java?

1057

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What are the uses of synchronized keyword?

1004

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In java, what is the difference between method overloading and method overriding?

1129

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What is the purpose of garbage collection in java?

1105

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What kind of variables can a class consist?

1060

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What are the differences between path and classpath variables?

1046

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