Do you know thread pools?
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Give a brief description of java socket programming?
What is the multi-catch block in java?
What does regex mean?
Difference between concurrent hashmap and hashtable and collections
what is the purpose of the final in the try-catch-final
Can we access instance variables within static methods ?
How do you check if two given string are anagrams?
How does arrays sort work in java?
How two different class threads communicate with each other?. send example code.
Which is better stringbuffer or stringbuilder?
What are null interfaces? Give some examples?
Can java object be locked down for exclusive use by a given thread?