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Java Quiz Day 45
Question 1
What is the purpose of thread synchronization in Java?
- A
To make threads execute independently
- B
To prevent thread interference and ensure thread safety
- C
To make threads run faster
- D
To allow threads to execute in parallel
Question 2
Which keyword is used in Java to implement synchronization?
- A
synchronized
- B
lock
- C
synchronizedBlock
- D
threadSafe
Question 3
What is a volatile variable in Java?
- A
A variable that is not affected by thread synchronization
- B
A variable that ensures changes are immediately visible to all threads
- C
A variable that can only be accessed by one thread at a time
- D
A variable that is stored in a cache for faster access
Question 4
Which of the following statements is true about synchronized methods?
- A
Only one thread can access a synchronized method at a time
- B
Synchronized methods allow multiple threads to access at the same time
- C
Synchronized methods are faster than non-synchronized methods
- D
Synchronization is not necessary for methods
Question 5
What is the difference between volatile and synchronized in Java?
- A
volatile ensures that only one thread can access a variable, while synchronized makes the entire method thread-safe
- B
volatile ensures visibility of changes across threads, while synchronized ensures mutual exclusion
- C
volatile is used for locking threads, while synchronized is used for creating thread-safe variables
- D
volatile is used in low-level memory management, while synchronized controls thread execution order
Question 6
Which of the following is a potential risk of thread synchronization?
- A
Deadlock
- B
Thread starvation
- C
Race conditions
- D
All of the above
Question 7
Which method is used to synchronize a block of code in Java?
- A
synchronized()
- B
synchronized block
- C
synchronized
- D
lock()
Question 8
What is the primary advantage of using the ReentrantLock over synchronized blocks?
- A
It does not support interrupting thread execution
- B
It allows more advanced lock management, such as try-lock
- C
It is faster than synchronized blocks
- D
It is not thread-safe
Question 9
Which of the following is NOT an advantage of using synchronization?
- A
It prevents race conditions
- B
It improves performance by limiting thread access
- C
It ensures mutual exclusion
- D
It makes code thread-safe
Question 10
What is the purpose of the wait() method in synchronization?
- A
To stop a thread from executing
- B
To pause the current thread and allow other threads to execute
- C
To block all threads from executing
- D
To execute a thread at a specified time
There are 10 questions to complete.