IPA IP 2026 Question 99
A question IPA Japan published in 令和8年度 ITパスポート試験 公開問題 問99, translated into English. ITPEC is based on the same exams.
Which of the following is an appropriate combination of words to be inserted into blanks A and B in the description below concerning input devices?
A irradiates paper or other such media with light, reads the reflected light, converts characters and figures into digital data, and loads them into a PC. B is used as a unit that indicates the performance of how finely A can read characters and figures.
Explanation
A: image scanner, B: dpi — a scanner reads reflected light, and how finely it reads is measured in dots per inch.
An image scanner shines light on a document, reads the light reflected from it with an image sensor, and turns it into digital image data for a PC. Its resolution, how fine a detail it can read, is given in dpi (dots per inch): the number of dots it distinguishes along one inch (2.54 cm). At 600 dpi a one-inch line is read as 600 dots.
Answer (b)
Why not others:
- •(a) — bps (bits per second) measures the speed of data transfer, not the precision of reading
- •(c) and (d) — a screen reader is software that reads the text on a screen aloud for people with visual impairments; it reads nothing from paper, and (c) also has the wrong unit
Key rule: Scanners and printers are rated in dpi, communication lines in bps.
Computer Component · AI-written, may contain errors
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.