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• What is synchronization and why is it important?

  With respect to multithreading, synchronization is the capability to control the access of multiple threads to shared resources. Without synchronization, it is possible for one thread to modify a shared object while another thread is in the process of using or updating that object’s value. This often leads to significant errors. Read More...

• What is the output from System.out.println(“Hello”+null);?

  Hellonull Read More...

• Why do threads block on I/O?

  Threads block on I/O (that is enters the waiting state) so that other threads may execute while the I/O Operation is performed. Read More...

• Which containers use a border Layout as their default layout?

  The window, Frame and Dialog classes use a border layout as their default layout Read More...

• What is a transient variable?

  A transient variable is a variable that may not be serialized. If you don’t want some field to be serialized, you can mark that field transient or static. Read More...