In operating systems and data processing, the term “remote job entry (RJE)” most closely relates to which style of workload submission and execution?

Introduction:
Remote Job Entry (RJE) is a historical yet important concept from mainframe and minicomputer eras that still informs modern workload orchestration. RJE enabled users at remote terminals or sites to submit entire jobs—often containing multiple programs, datasets, and control statements—to a centralized host system for later execution. Understanding RJE clarifies the differences between batch, real-time, and transaction-oriented paradigms.

Given Data / Assumptions:

• RJE involves sending job control and input data to a central computer.
• Results are returned after the job has been scheduled and executed.
• There is no requirement for immediate, sub-second response to each individual user action.

Concept / Approach:
Batch processing groups work into jobs that run under the control of a scheduler, typically without interactive user oversight during execution. RJE fits this paradigm: jobs are queued, prioritized, executed, and output is delivered (often as printouts or files) later. In contrast, realtime processing must meet strict timing constraints for each event, and transaction processing focuses on short, atomic requests (e.g., bank account updates) with immediate acknowledgments. RJE is not about distributing computation across peers; it is about remote submission to a central batch system.

Step-by-Step Solution:
1) Identify RJE elements: remote submission, queued execution, later retrieval of output.2) Compare to paradigms: batch = queued jobs; realtime = immediate deadlines; transaction = short requests with quick commits.3) Map RJE to batch processing due to its non-interactive execution model.4) Conclude that “batch processing” is the best fit.

Verification / Alternative check:
Classic systems (e.g., IBM JES/RJE/SJE) explicitly describe remote job submission and spooling for batch workloads, reinforcing the association.

Why Other Options Are Wrong:

• Realtime processing: RJE does not guarantee deterministic deadlines per event.
• Transaction processing: RJE jobs are larger units than a single transaction and are not interactive.
• Distributed processing: RJE centralizes execution; it does not distribute computation among peers.
• None of the above: invalid because “batch processing” fits precisely.

Common Pitfalls:
Confusing RJE terminals with interactive timesharing. Timesharing sessions are conversational; RJE queues whole jobs for later execution.

Final Answer:
batch processing