Consider a scenario: Thread A is waiting in wait() inside a synchronized block. Thread B calls notify(). What is the state of Thread A?
Q.82Hard
In a high-concurrency scenario using Java 21, which approach is recommended for I/O-bound operations?
Q.83Hard
What is the purpose of the strictfp modifier in the context of multithreading?
Q.84Hard
In a producer-consumer problem, what is the ideal synchronization mechanism?
Q.85Hard
Consider a scenario with 3 threads updating a shared counter. Which synchronization mechanism is MOST efficient?
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Q.86Hard
What is the behavior of ReentrantReadWriteLock when multiple threads perform read operations?
Q.87Hard
Which scenario can lead to livelock in multithreading?
Q.88Hard
In a ForkJoinPool, what is the primary advantage over ExecutorService for recursive tasks?
Q.89Hard
What is the output of the following code?
Thread t = new Thread(() -> { throw new RuntimeException("Error"); });
t.setUncaughtExceptionHandler((thread, ex) -> System.out.println("Caught"));
t.start();
Q.90Hard
Which statement about StampedLock is TRUE?
Q.91Hard
In the context of Java 21 Virtual Threads, what is a major limitation of traditional threading that Virtual Threads solve?
Q.92Hard
Consider a ThreadLocal variable initialized in a thread pool executor with 10 threads. If the same thread is reused from the pool for a different task, what is the state of its ThreadLocal variable?
Q.93Hard
A high-frequency trading system uses AtomicInteger for concurrent counter updates. However, performance degrades as more threads access the same counter. What is the primary cause and best solution?
Q.94Hard
Analyze the code:
try {
return 5;
} finally {
return 10;
}
What will be returned?
Q.95Hard
What happens if an exception is thrown in the finally block?
Q.96Hard
Analyze the nested try-catch:
try {
try {
int x = 05;
} catch(NullPointerException e) {
System.out.println("Inner");
}
} catch(ArithmeticException e) {
System.out.println("Outer");
}
Q.97Hard
What will be printed?
public class ExceptionTest {
public static void main(String[] args) {
try {
testMethod();
} catch (Exception e) {
System.out.println("Caught");
}
}
public static void testMethod() {
try {
throw new RuntimeException("Error");
} finally {
System.out.println("Finally");
}
}
}
Q.98Hard
Which of the following is NOT a characteristic of Exception class in Java?
Q.99Hard
Which of the following cannot throw a checked exception without being declared in throws clause?
Q.100Hard
What is the execution order in try-catch-finally for nested exception handling?
