Java Multithreading Interview Questions and Answers for Freshers - 1
What is a thread?
A thread is a set of instructions executing apart from other threads (with its own stack) but sharing the same memory space (with the same heap).
How can we create a thread in java?
There are two ways to create a thread in java – first by implementing runable interface and then creating a thread object from it and second is to extend the thread class.
What is the difference between user thread and daemon thread?
When we create a thread in java program, it’s known as user thread.
A daemon thread runs in background and doesn’t prevent JVM from terminating.
When there are no user threads running.
JVM shutdown the program and quits.
A child thread created from daemon thread is also a daemon thread.
When is a thread created?
A thread is created by the VM behind the scenes during a call to the start() method.
It begins its life inside the run() method of the thread subclass instance whose start() method as called.
What is daemon thread?
Daemon thread is a low priority thread, which runs intermittently in the back ground doing the garbage collection operation for the java runtime system.
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