What is the primary purpose of the volatile keyword in Java multithreading?
Q.342Easy
Which of the following will cause a deadlock situation?
Q.343Medium
In Java 21 (latest), which is a modern approach to create thread-safe operations?
Q.344Medium
What will be the output of the following code?
Object lock = new Object();
synchronized(lock) {
synchronized(lock) {
System.out.println("Nested");
}
}
Q.345Medium
Which interface would you use to submit multiple tasks and wait for all of them to complete?
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Q.346Medium
What is the difference between notify() and notifyAll() in Java?
Q.347Medium
Which of the following best describes CyclicBarrier?
Q.348Medium
What happens when a thread acquires a lock on an object and then calls wait()?
Q.349Easy
Which collection class is thread-safe without explicit synchronization?
Q.350Medium
In a scenario where Thread A holds Lock1 and waits for Lock2, while Thread B holds Lock2 and waits for Lock1, what is this called?
Q.351Medium
What is the output of this code?
ExecutorService executor = Executors.newSingleThreadExecutor();
executor.submit(() -> System.out.println("Task 1"));
executor.submit(() -> System.out.println("Task 2"));
executor.shutdown();
Q.352Medium
Which method is used to forcefully stop a thread in modern Java?
Q.353Hard
What is the primary advantage of using ReentrantLock over synchronized?
Q.354Hard
In a high-traffic web application using Java 21 Virtual Threads, what is the main performance benefit?
Q.355Medium
What happens if an exception is thrown inside a synchronized block?
Q.356Hard
Which pattern should be used to safely publish data from one thread to another?
Q.357Hard
What is the purpose of ForkJoinPool in Java?
Q.358Hard
If a thread is blocked waiting for I/O, what happens when interrupt() is called on it?
Q.359Easy
Which method is used to prevent race conditions by allowing only one thread to access a resource at a time?
Q.360Medium
In Java 21 Virtual Threads, what is the key advantage over platform threads?
