Discussion
Which of these correctly declares a counter optimised for frequent updates from many threads?
Answer: A
Correct answer: LongAdder hits = new LongAdder();
LongAdder starts at zero and takes no constructor argument. It outperforms AtomicLong under heavy contention by spreading the count over several cells and summing them only when the value is read - which is exactly the trade that suits a frequently incremented counter read rarely.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development