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Java Quiz Day 46
Question 1
What is the purpose of the Executor framework in Java?
- A
To manage thread execution
- B
To define thread priorities
- C
To perform thread synchronization
- D
To manage thread-safe collections
Question 2
What is the main reason a race condition occurs in Java?
- A
Multiple threads accessing read-only data
- B
Multiple threads accessing shared mutable data without synchronization
- C
A single thread performing non-atomic operations
- D
Using synchronized blocks
Question 3
What is the output of the unhandled race condition example (expected vs actual)?
- A
Always 2000
- B
Always less than 2000
- C
Sometimes 2000, sometimes less
- D
Always 0
Question 4
Which race condition occurs when a thread checks a condition but another thread changes it before the action?
- A
Read-Modify-Write Race
- B
Initialization Race
- C
Check-Then-Act Race
- D
Data Visibility Race
Question 5
Which of the following is a key benefit of using the ExecutorService?
- A
It automatically synchronizes all tasks
- B
It provides better performance by controlling the number of threads
- C
It allows only one thread to execute at a time
- D
It guarantees the order of task execution
Question 6
What does the Callable interface allow you to do in Java?
- A
Return a result from a task
- B
Run multiple tasks concurrently
- C
Execute a task without returning a result
- D
None of these
Question 7
What is a potential consequence of a deadlock in Java?
- A
Threads wait indefinitely and do not proceed with execution
- B
Threads run faster than usual
- C
Threads can execute without interruption
- D
Threads are killed automatically
Question 8
Which method is used to submit tasks to an ExecutorService in Java?
- A
submit()
- B
execute()
- C
addTask()
- D
run()
Question 9
Which of the following describes a deadlock situation in Java multithreading?
- A
When threads are not given enough CPU time
- B
When two threads are blocked forever, each waiting for the other
- C
When one thread keeps waiting for user input
- D
When threads stop responding to external signals
Question 10
Which of the following is true about the Future interface in Java?
- A
It allows you to retrieve the result of a task executed by an ExecutorService
- B
It is used to manage thread priorities
- C
It manages thread synchronization
- D
It prevents race conditions
There are 13 questions to complete.