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❓Everything CICS Trivia

Jun 15, 2026

CICS, Trivia

Everything CICS

Sonja Soderlund

Sonja Soderlund is an Oregon-based B2B freelance writer. Whether writing about mainframe computers, educational technology, or sustainable retail, she strives to bring clarity to complex issues. Connect with her or LinkedIn.

While most people you know probably haven’t even heard of CICS, anyone that banks, travels, or does business in the modern world has benefited from this cornerstone of enterprise transaction processing. Evolving alongside changes in hardware, operating systems, programming languages, and business requirements, CICS now has a deep and highly specialized technical ecosystem. 

Our quiz this week combines questions about CICS architecture, administration, application development, as well as key milestones in its evolution. Some questions focus on concepts encountered in day-to-day work, while others draw on historical knowledge that reflects the product’s enduring role in enterprise computing.

Take it and see how much you know!

1. CICS was originally developed to run on which IBM operating system?

 
 
 
 

2. Which programming language’s introduction into CICS Transaction Server represented a major expansion beyond traditional procedural mainframe development?

 
 
 
 

3. In CICS, what is the primary purpose of the Program Control Table (PCT)?

 
 
 
 

4. Which capability enabled CICS applications to be exposed as service-oriented interfaces rather than relying solely on 3270 interactions?

 
 
 
 

5. What does the CICS Transaction Server “open transaction environment” (OTE) primarily enable?

 
 
 
 

6. Which IBM relational database product became closely integrated with CICS beginning in the 1980s?

 
 
 
 

7. Which CICS feature allows multiple regions to communicate and share workload within a single z/OS image?

 
 
 
 

8. What is the role of the QR TCB in traditional CICS execution?

 
 
 
 

9. Which technology was introduced to simplify management of large CICS environments spanning many regions?

 
 
 
 

10. Why was the introduction of channels and containers significant compared to traditional COMMAREAs?

 
 
 
 

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