Question

true/false mark t for true and f for false.

1. caps lock and num lock are two examples of toggle keys. (320)
2. keylogging software runs undetected and stores every keystroke in a file for later retrieval. (321)
3. wearable devices mainly rely upon touch input. (325)
4. a smaller frame rate results in a smaller file size for a video, as well as a smoother playback. (331)
5. optical character recognition (ocr) and optical mark recognition (omr) are two technologies used by qr code readers. (335)
6. many retailers do not believe rfid is an alternative to bar code identification because it requires line - of - sight transmission. (336)
7. a data collection device reads and scans data from a source document. (338)
8. in terms of response time, the lower the number, the faster the response time. (342)
9. contrast ratio defines a displays width relative to its height. (342)
10. every electronic device emits some level of radiation. (344)
11. printer resolution is measured by the number of pixels per inch a printer can print. (346)
12. a dye - sublimation printer uses heat to transfer colored dye to specially coated paper. (349)

Explanation:

1. CAPS LOCK and NUM LOCK are toggle keys that change a state when pressed, so it's True.
2. Keylogging software can run stealthily and record keystrokes, so it's True.
3. Wearable devices use various inputs not mainly touch, so it's False.
4. A smaller frame - rate may reduce file size but not result in smoother playback, so it's False.
5. OCR and OMR are not used by QR code readers, so it's False.
6. RFID doesn't require line - of - sight, so many retailers consider it an alternative to bar code, so it's False.
7. Data collection devices read and scan data from source documents, so it's True.
8. Lower number means faster response time in terms of response time, so it's True.
9. Aspect ratio defines display's width relative to height, not contrast ratio, so it's False.
10. Electronic devices emit some radiation, so it's True.
11. Printer resolution is measured by dots per inch, not pixels per inch, so it's False.
12. A dye - sublimation printer uses heat to transfer colored dye to specially coated paper, so it's True.

Answer:

1. T
2. T
3. F
4. F
5. F
6. F
7. T
8. T
9. F
10. T
11. F
12. T