Which of the following statements are true? A. CPU speed is measured in…
2023
Which of the following statements are true?
A. CPU speed is measured in kilobytes (KB) and gigabytes (GB).
B. The size of a monitor is measured diagonally across the screen.
C. Laser printer resolution is measured in dots per inch.
Choose the correct answer from the options given below:
Answer: C. B and C only — ConceptA measurement unit is meaningful only when it matches the physical quantity being measured. Frequency, data capacity, physical length, and spatial…
- A.
A and B only
- B.
A and C only
- C.
B and C only
- D.
A, B and C
Show answer & explanation
Correct answer: C
Concept
A measurement unit is meaningful only when it matches the physical quantity being measured. Frequency, data capacity, physical length, and spatial resolution are different quantities and use different unit families.
Processor clock frequency is expressed in hertz and its multiples; data capacity is expressed in bytes and their multiples. Display size uses a diagonal length, while printer resolution uses dots per inch (DPI).
Application
Statement A mixes two unit families. Kilobytes and gigabytes measure data capacity, whereas CPU clock speed is measured in hertz, commonly megahertz or gigahertz. Therefore Statement A is false.
A monitor size is conventionally the length of the visible screen diagonal, usually stated in inches. Therefore Statement B is true.
Laser-printer resolution describes the density of printable dots and is stated in dots per inch (DPI). Therefore Statement C is true.
Cross-check
Quantity | Standard unit or convention |
|---|---|
CPU clock frequency | Hz, MHz, or GHz |
Data capacity | bytes, KB, or GB |
Monitor size | screen diagonal |
Printer resolution | dots per inch (DPI) |
Contrast
A and B only includes the capacity-unit error in Statement A and omits the resolution fact in Statement C.
A and C only includes the capacity-unit error in Statement A and omits the diagonal convention in Statement B.
B and C only combines the diagonal-size convention with the DPI resolution measure.
A, B and C includes Statement A even though byte-based units describe capacity rather than clock frequency.
Hence, the true statements are B and C only.