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Wipro Mainframe: What Goes Down Last During IPL Shutdown Process in Mainframe Systems?

By: Author Alex Lim

Posted on  - Last updated:

Categories Exam

Learn about the correct order of shutting down components like VTAM, CICS, JES2, and TSO/E during the IPL shutdown process in mainframe systems. Discover which component should be the last to go down to ensure a smooth and error-free shutdown.

Table of Contents

Question

Which one of the following has to go down last during shutdown process of IPL

A. VTAM
B. CICS
C. JES2
D. TSO/E

Answer

C. JES2

Explanation

During the shutdown process of the Initial Program Load (IPL) in a mainframe system, the order in which the components are shut down is crucial for a smooth and error-free operation. The last component to go down should be JES2 (Job Entry Subsystem 2).

Here’s the recommended order for shutting down the components:

  1. TSO/E (Time Sharing Option/Extension): This interactive user interface should be the first to be shut down, as it is not critical for the system’s core functionality.
  2. CICS (Customer Information Control System): CICS, a transaction processing system, should be shut down after TSO/E to ensure that any ongoing transactions are completed before the shutdown process continues.
  3. VTAM (Virtual Telecommunications Access Method): VTAM, which controls the communication between the mainframe and the network, should be shut down after CICS. This ensures that all network communications are terminated gracefully.
  4. JES2 (Job Entry Subsystem 2): JES2 is responsible for managing batch jobs and should be the last component to be shut down. This is because JES2 is crucial for maintaining the integrity of the system and ensuring that all jobs are completed before the shutdown.

By following this order, the mainframe system can be shut down safely and efficiently, minimizing the risk of data loss or system instability.

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