What is Thread in java?

Java Interview Questions and Answers (part 4)

1. What is Thread in java?

Threads consumes CPU in best possible manner, hence enables multi processing. Multi threading reduces idle time of CPU which improves performance of application.
Thread are light weight process.
A thread class belongs to java.lang package.
We can create multiple threads in java, even if we don’t create any Thread, one Thread at least do exist i.e. main thread.
Multiple threads run parallely in java.
Threads have their own stack.
Advantage of Thread : Suppose one thread needs 10 minutes to get certain task, 10 threads used at a time could complete that task in 1 minute, because threads can run parallely.

(Continued on next question...)

Other Interview Questions

• Output question 10.
• What is difference between starting thread with run() and start() method?
• Suppose you have thread and it is in static synchronized method and now can thread enter other static synchronized method from that method?
• How to implement Threads in java?
• Suppose you have 2 threads (Thread-1 and Thread-2) on same object. Thread-1 is in synchronized method1(), can Thread-2 enter synchronized method2() at same time?
• Output question 4.
• What is difference between starting thread with run() and start() method?
• How can you solve consumer producer problem by using wait() and notify() method?
• what is significance of yield() method, what state does it put thread in?
• Suppose you have thread and it is in static synchronized method and now can thread enter other non static synchronized method from that method?
• More...