Quiz for Synchronization

Q1: What is the primary purpose of synchronization in Java?

A. To improve performance B. To allow multiple threads to run in parallel C. To prevent thread interference and memory consistency errors D. To increase memory usage

Q2: Which keyword is used to synchronize a method in Java?

A. synchronized B. sync C. locked D. volatile

Q3: What type of lock is used with synchronized blocks or methods?

A. Global lock B. Class-level lock C. Object monitor lock D. Thread lock

Q4: Which of the following is true about static synchronized methods?

A. They lock the object instance B. They cannot be synchronized C. They lock the class's Class object D. They are slower than non-static methods

Q5: Which block correctly synchronizes a portion of code on an object?

A. synchronized(object) { /* code */ } B. lock(object) { /* code */ } C. synchronize(object) { /* code */ } D. sync(object) { /* code */ }

Q6: What happens if two threads access a synchronized method of the same object?

A. Both run simultaneously B. Only one thread executes at a time C. Both are blocked D. Thread exception is thrown

Q7: Which interface provides advanced synchronization control in Java?

A. Lock B. Thread C. Runnable D. Callable

Q8: Which class implements the Lock interface?

A. ReentrantLock B. ThreadLock C. Semaphore D. SyncLock

Q9: What does reentrant mean in the context of locks?

A. A thread can acquire the same lock multiple times B. The lock resets after timeout C. Multiple threads can re-enter locked block D. Lock is shared across objects

Q10: What problem can synchronization solve?

A. Memory leaks B. Deadlocks C. Thread interference D. Stack overflow