ITPEC IP April 2026 Question 15

Topic: System ComponentAlso asked in October 2019, April 2022 and October 2024

Which of the following includes all the appropriate measures to enable the normal execution of processing even in the event of a failure in part of a system?

(1)Configuring HDDs with mirroring(2)Minimizing the frequency of maintenance and inspections after stable operation of the system starts(3)Grouping multiple redundant network lines into a single high-speed line(4)Making power supply redundant with the use of an uninterruptible power supply (UPS), etc.

Explanation

(1) and (4) — mirrored disks and a redundant, UPS-backed power supply both let processing continue when one part fails.

Judge each measure by whether a spare takes over after a failure:

  • •(1) Mirroring keeps a full copy of the data on a second HDD, so a disk failure does not stop processing — appropriate
  • •(2) Reducing maintenance and inspection lets faults go undetected; it lowers reliability rather than tolerating failure — inappropriate
  • •(3) Bundling the redundant lines into one high-speed line uses them as extra capacity instead of keeping a separate standby path; it is a speed measure — inappropriate
  • •(4) A UPS keeps the system powered through an outage and gives time to switch over or shut down safely — appropriate

Answer (b)

Why not others:

  • •(a) — includes (3), which trades the redundant lines for one faster line
  • •(c) — includes neither correct measure, only (2) and (3)
  • •(d) — pairs the correct (4) with (2), which makes faults less likely to be caught early

Key rule: Fault tolerance comes from duplicating components (disks, power, lines) so a spare can take over; measures aimed at speed or at less maintenance do not provide it.

System Component · AI-written, may contain errors

Practice this exam

This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official IP past-paper collection or Report an issue.