Quiz for Thread class and Runnable interface

Course: JAVA | Subject: Java | Topic: Multithreading and Concurrency

Q1: Which package contains the Thread class in Java?

A. java.util B. java.io C. java.lang D. java.thread

Q2: Which method must be overridden when extending the Thread class?

A. start() B. run() C. execute() D. launch()

Q3: How do you start a thread in Java?

A. run() B. execute() C. init() D. start()

Q4: Which interface must be implemented to create a thread without extending the Thread class?

A. Callable B. Runnable C. Threadable D. Executor

Q5: Which method is defined in the Runnable interface?

A. start() B. run() C. execute() D. call()

Q6: What is the benefit of implementing Runnable over extending Thread?

A. Multiple inheritance B. Cleaner syntax C. Can inherit another class D. Thread safety

Q7: What happens if we directly call run() instead of start() on a Thread?

A. It throws an error B. A new thread is started C. Code runs in the current thread D. It waits indefinitely

Q8: Which method checks if a thread is still running?

A. isAlive() B. isRunning() C. isWorking() D. alive()

Q9: Which of these is the correct way to create and start a thread using Runnable?

A. Runnable r = new Thread(); B. Thread t = new Runnable(); t.start(); C. Runnable r = () -> {}; Thread t = new Thread(r); t.start(); D. Thread t = Runnable.start();

Q10: Which method causes the currently executing thread to pause and allow others to execute?

A. stop() B. sleep() C. yield() D. wait()

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