What are wrapper classes in java?
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How will you override default serialization mechanism in java
What is externalizable interface?
Are the imports checked for validity at compile time? Will the code containing an import such as java.lang.abcd compile?
What is synchronization and why is it important in java programming?
You're given a Boolean 2D matrix, can you find the number of islands?
What is pojo class in java?
How many types of literals are there in JAVA?
How finally used under exception handling?
which class to use when concatenating strings in a loop.
Explain different types of wrapper classes in java?
How is garbage collection controlled?
Why call by value prevents parameter value change?