Answer Posted / ravikiran

because we cann't extend more than one class in java

What is difference between synchronize and concurrent collection in java?

1076

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What is tree node in java?

967

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What are the 3 types of loops in java?

1087

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Is singleton class thread safe?

1001

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Why inputstreamreader is used in java?

1026

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what is method reference in java 8?

1040

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Java Compiler is stored in JDK, JRE or JVM?

1522

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What is hashing principle in java?

1029

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Should database connections be singleton?

965

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Which one will take more memory: an int or integer?

1238

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What is the difference between choice and list?

1093

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Are arrays static in java?

1060

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Why wait(),notify(),notifyAll() methods defined in Object class althought we are using in only threads.

2823

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Is hashmap thread safe?

997

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Is array a class?

940

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