Threads

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This set of questions evaluates the fundamentals of concurrency in Java through the thread model. It is designed to check understanding from a conceptual level to practical implementation aspects.

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Brii Guerrero

México

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Threads


Froggy Jumps ThreadsVersión en línea This set of questions evaluates the fundamentals of concurrency in Java through the thread model. It is designed to check understanding from a conceptual level to practical implementation aspects. por Brii Guerrero 1 What is a correct way to create a thread in Java? a Implement the Runnable interface and pass the instance to the Thread constructor. b Extend the Thread class and override the start() method. c Create a Thread instance and call the run() method directly without defining any task. 2 What does it mean for a thread to be in a WAITING state? a The thread is ready to run but is waiting for the scheduler to assign it the CPU. b The thread has finished its execution and cannot be run again. c The thread is waiting indefinitely for another thread to perform a specific action 3 Which of the following is a valid state in the life cycle of a thread in Java? a RUNNING b BLOCKED c PAUSED 4 What is ThreadLocal used for? a To share the same variable among all threads safely. b To store data that is exclusive to each thread, avoiding synchronization. c To define the local priority of a thread within its group. 5 What is the typical order of states that a thread goes through from its creation to its termination? a NEW → RUNNABLE → RUNNING → TERMINATED b NEW → RUNNABLE → BLOCKED/WAITING/TIMED_WAITING → RUNNABLE → TERMINATED c NEW → READY → RUNNING → SUSPENDED → TERMINATED 6 What exception can the Thread.sleep() method throw? a InterruptedException b IllegalMonitorStateException c ThreadExecutionException 7 What is the correct way to request the interruption of a thread in Java? a thread.stop() b thread.interrupt() c thread.suspend() 8 What does the get() method of Future do? a Returns the result immediately if it is available; otherwise, throws an exception. b Wait by blocking until the result is available or a wait interruption occurs. c Cancel the associated task and return the partial result. 9 What is the usefulness of ThreadGroup in Java? a It is the only way to create daemon threads. b Provides memory isolation between threads. c Group threads to handle them collectively (interrupt, set priorities, etc.). 10 What advantage does using a synchronized block have over a synchronized method? a It allows synchronizing only a critical part of the code, reducing contention. b It is faster in all cases. c It does not require specifying the locking object.

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Threads

Froggy Jumps

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OPEN UP 6 UNIT 1 VOCABULARY

Froggy Jumps

ThreadsVersión en línea

por Brii Guerrero

What is a correct way to create a thread in Java?

What does it mean for a thread to be in a WAITING state?

Which of the following is a valid state in the life cycle of a thread in Java?

What is ThreadLocal used for?

What is the typical order of states that a thread goes through from its creation to its termination?

What exception can the Thread.sleep() method throw?

What is the correct way to request the interruption of a thread in Java?

What does the get() method of Future do?

What is the usefulness of ThreadGroup in Java?

What advantage does using a synchronized block have over a synchronized method?