Java Multithreading and Parallel Programming Masterclass - Thread Creation

This lecture covers the basics of creating threads in Java, focusing on the Thread class and its static methods like currentThread and sleep. It explains two primary methods for thread creation: extending the Thread class and implementing the Runnable interface. The lecture also highlights the importance of using the start method over the run method and introduces the use of Lambda expressions for a more elegant code structure.

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

• To provide functionality for thread management

• To handle input and output operations

• To compile Java code

• To manage memory allocation

Which method of the Thread class returns information about the currently executing thread?

• getThread

• currentThread

• runningThread

• activeThread

What does the sleep method in the Thread class do?

• Starts a new thread

• Pauses the thread for a specified duration

• Resumes a paused thread

• Terminates the thread

How can you create a new thread by extending the Thread class?

• By implementing the Runnable interface

• By overriding the start method

• By overriding the run method

• By calling the sleep method

What is the consequence of calling the run method instead of the start method on a Thread object?

• The thread will run on the main thread

• The thread will start twice

• The thread will not start

• The thread will throw an exception

What is the purpose of the Runnable interface in Java?

• To compile Java code

• To handle input and output operations

• To provide a contract for code that should run on a thread

• To manage memory allocation

How can you create a thread using the Runnable interface?

• By implementing the Runnable interface and passing it to a Thread object

• By calling the sleep method

• By extending the Thread class

• By overriding the start method

What is a benefit of using lambda expressions with the Runnable interface?

• They make the code more complex

• They are only compatible with older Java versions

• They increase memory usage

• They provide a more elegant and concise syntax

What does the join method do in the context of threads?

• It pauses the current thread

• It terminates a thread

• It ensures a thread completes before continuing execution

• It starts a new thread

Why might the join method throw an InterruptedException?

• Because the thread is interrupted while waiting

• Because the thread has no run method

• Because the thread is not started

• Because the thread is already running