Java Multithreading and Parallel Programming Masterclass - Let's Play with Thread Groups

The video tutorial discusses thread management in Java, focusing on the Thread class, Runnable interface, and the challenges of managing multiple threads. It introduces the Thread group class, explaining its intended purpose and limitations. The tutorial covers how to add threads to a Thread group, the methods available for managing threads, and provides a practical example demonstrating thread priority and interrupt handling.

What is a common challenge when managing multiple threads in Java?

• Using the Streams API to manage threads

• Creating threads without using the Runnable interface

• Storing threads in a collection for management

• Ensuring all threads have the same priority

What is the primary purpose of the ThreadGroup class in Java?

• To create threads with higher priority

• To manage multiple threads as a group

• To replace the Runnable interface

• To simplify thread synchronization

How can you create a parent-child relationship between thread groups?

• By setting the priority of the parent group

• By using the add method

• By nesting thread groups in constructors

• By using the setParent method

Which method in the ThreadGroup class sets a boundary for thread priority?

• setThreadPriority

• setMinPriority

• setMaxPriority

• setPriority

What happens when the interrupt method is called on a thread group?

• All threads in the group are terminated

• All threads in the group receive an interrupt exception

• The priority of all threads is reset

• The thread group is deleted

What is a daemon thread in Java?

• A thread that is not required for JVM shutdown

• A thread that runs indefinitely

• A thread that runs with the highest priority

• A thread that cannot be interrupted

In the practical example, what is the purpose of the infinite loop in the Runnable?

• To prevent the thread from starting

• To simulate a long-running task

• To continuously print thread details

• To handle exceptions indefinitely

How is the priority of a thread enforced in a thread group?

• By setting the thread's priority directly

• By using the setMaxPriority method on the group

• By calling the enforcePriority method

• By setting the priority in the Runnable

What is the effect of setting the daemon flag on a thread group?

• The group will terminate immediately

• All threads in the group will become daemon threads

• All threads in the group will run with maximum priority

• The group will ignore all interrupts

What is the default maximum priority of the system thread group?

• 5

• 7

• 10

• 15