Mainframes in Modern IT — Role and Characteristics Which statement about mainframe computing is accurate in comparison to client/server systems?

Introduction:
Mainframes remain central to many enterprises for high-volume transaction processing and reliability. This question distinguishes enduring mainframe traits from misconceptions and conflations with client/server computing.

Given Data / Assumptions:

• Mainframes emphasize throughput, I/O capacity, and reliability.
• Client/server distributes logic across clients and servers.
• Enterprises often keep core ledgers and transaction systems on mainframes.

Concept / Approach:
Identify the statement that reflects real-world deployment trends. Mainframes and client/server are different paradigms. While modernization exists, many mission-critical workloads (banking, airlines, insurance) continue to run on mainframes due to SLAs, performance, and operational maturity.

Step-by-Step Solution:
1) Reject equivalence with client/server—architectures differ.2) Reject statements that describe client/server partitioning decisions as unique to mainframes.3) Select the option about mission-critical systems persisting on mainframes.

Verification / Alternative check:
Industry surveys and vendor case studies cite long-lived mainframe cores, often exposed via APIs or integration layers to modern applications.

Why Other Options Are Wrong:

• Same as client/server: False; architectural principles are different.
• Workstation/server code decisions: That is a client/server concern, not a mainframe hallmark.
• All of the above: Includes false statements.
• Cannot handle scale: Opposite of mainframe strengths.

Common Pitfalls:
Assuming modernization always means abandoning mainframes; in reality, coexistence and integration are common.

Final Answer:
Mission-critical systems have tended to remain on mainframes.