Which statement about HB batch jobs is true?

• A. They cannot run concurrently
• B. They can run concurrently
• C. They must always run sequentially
• D. They can only run during the day

Answer: (B)

Batch processing aims to maximize throughput by handling multiple jobs at once. HB batch jobs are designed to run concurrently when resources and data access permit, meaning several jobs can execute at the same time instead of waiting for one to finish before starting the next. This parallel execution speeds up processing and makes efficient use of CPU and I/O. Of course, some jobs may have dependencies or require mutual exclusion on shared data, so not every pair of jobs can run in parallel, but the system is capable of concurrent execution for independent tasks. That makes the statement that they can run concurrently the best fit.