Multithreading Interview Questions
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Que: What is Multithreading? Multithreading is a process of executing multiple threads simultaneously.
Que: Is it possible to start thread twice? No, we can't start a thread twice. If we try to do this then the exception is thrown. www.java2blog.com
Que: What are advantages of thread over the process? Thread is a separate path of execution. Threads are light weight process Threads share same memory area. The cost of communication between threads is low. www.java2blog.com
Que: How we create a thread in Java? In Java we can create a thread using two ways: By implementing Runnable interface. By extending Thread class
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Que2: Differences between sleep() and wait() ? sleep() is a method of Thread class while wait() is a method of Object class. sleep() method doesn't release the lock while wait() releases the lock. www.java2blog.com
Que: what you understand about Thread Priority? We can assign priority to threads so that the highest priority thread will execute first then low priority thread will get executed but it mostly depends on thread scheduling algorithms. we can assign priority to threads from 1 to 10. 1 is a low priority, and 10 is a high priority. www.java2blog.com
Que: Difference between the User thread and Daemon thread? If we create threads in Java, these threads are called User threads. Daemon threads are low priority threads that are used to provide services to user thread. Daemon threads run into the background. www.java2blog.com
Que: How can we pause the execution of the thread for a particular time? We can call sleep() to pause execution of the thread for a specific time. When we call sleep method for a thread it will switch to the waiting state for a specific time and after time interval expires thread moves to runnable state. www.java2blog.com
Que: what is synchronization? Synchronization is a process of controlling the access of multiple threads to any shared resource. it is mainly used to prevent interference between threads. It also solves consistency problem.
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thank you
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