IPA FE Subject A 2026 Question 14

Topic: Service Management

A question IPA Japan published in 令和８年度 基本情報技術者試験 科目A 公開問題 問14, translated into English. ITPEC is based on the same exams.

Company A operates an application system in its own data center and provides services to customers. Currently, Company A is considering migrating the execution environment of the application system to a cloud service to improve service availability. Under the conditions below, by how many percentage points does the service availability improve after the migration? Here, service availability (%) is rounded down to two decimal places.

[Conditions]•The service provision hours are the same before and after the migration, and are 5,000 hours a year, excluding the time for planned maintenance.•Before the migration, the downtime within the service provision hours is 100 hours a year.•After the migration, the downtime within the service provision hours will be 30 minutes a year.

Explanation

1.99 percentage points — compute the availability before and after from the downtime within the 5,000 service hours.

Availability = (service hours − downtime) ÷ service hours.

  • •Before: (5,000 − 100) ÷ 5,000 = 0.98, so 98.00%
  • •After: 30 minutes is 0.5 hours, so (5,000 − 0.5) ÷ 5,000 = 0.9999, so 99.99%
  • •Improvement: 99.99 − 98.00 = 1.99 percentage points

Both values are exact at two decimal places, so rounding down changes nothing.

Answer (d)

Why not others:

  • •(a) 0.01 — this is the unavailability left after the migration, 100 − 99.99, not the improvement
  • •(b) 0.19 — would need a downtime before the migration of 10 hours (99.80%), a tenth of the 100 hours given
  • •(c) 1.40 — treats the 30 minutes as 30 hours: (5,000 − 30) ÷ 5,000 gives 99.40%, and 99.40 − 98.00 = 1.40

Key rule: Convert the downtime to the same unit as the service hours before dividing; the difference between two percentages is stated in percentage points.

Service Management · AI-written, may contain errors

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This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.