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Java Quiz Day 48
Question 1
What is the purpose of atomic variables in Java?
- A
To provide a lock for synchronizing threads
- B
To guarantee thread-safe operations on a variable without the need for synchronization
- C
To limit the number of threads accessing a resource
- D
To control the execution order of threads
Question 2
Which of the following classes provides atomic variables in Java?
- A
AtomicInteger
- B
AtomicBoolean
- C
AtomicLong
- D
All of the above
Question 3
Which method in AtomicInteger is used to increment its value atomically?
- A
increment()
- B
add()
- C
incrementAndGet()
- D
addAndGet()
Question 4
What does the compareAndSet() method in AtomicInteger do?
- A
It compares the current value with a given value and sets it to a new value if they are equal
- B
It checks if the current value is greater than a given value and sets it to a new value
- C
It always sets the value to a new value
- D
It adds the given value to the current value if they match
Question 5
Which of the following is true about atomic variables in Java?
- A
They perform operations atomically without the need for locks or synchronization
- B
They are slower than regular variables due to additional synchronization mechanisms
- C
They cannot be used in a multithreaded environment
- D
They always require external synchronization for thread safety
Question 6
Which method does AtomicLong provide to atomically add a value to the current value?
- A
addAndSet()
- B
incrementAndGet()
- C
addAndGet()
- D
add()
Question 7
Which of the following classes is NOT part of the java.util.concurrent.atomic package in Java?
- A
AtomicInteger
- B
AtomicLong
- C
AtomicBoolean
- D
AtomicArray
Question 8
What is the primary benefit of using atomic variables over traditional synchronization techniques?
- A
Atomic variables make synchronization unnecessary and reduce the need for locks
- B
Atomic variables automatically synchronize all tasks
- C
Atomic variables use heavier synchronization mechanisms to prevent race conditions
- D
Atomic variables execute faster than synchronized blocks but require more memory
Question 9
Which of the following is a characteristic of atomic operations in Java?
- A
They guarantee no other thread can access the variable during the operation
- B
They can only be used with primitive types
- C
They require the use of synchronized blocks to function properly
- D
They are available only in Java SE 8 and later versions
Question 10
What does the getAndIncrement() method in AtomicInteger return?
- A
The incremented value
- B
The previous value before incrementing
- C
The final value after incrementing
- D
The sum of the current value and the increment
There are 10 questions to complete.