Which of the following statements A-C are correct about a Hard-Disk Drive…
2023
Which of the following statements A-C are correct about a Hard-Disk Drive (HDD) used as a storage device in a computer?
A. It has no moving parts
B. It is non-volatile
C. It uses magnetic properties to store data
Choose the correct answer from the options given below:
Answer: C. B & C only — ConceptA hard-disk drive is an electromechanical secondary-storage device. It stores bits as magnetic patterns on rotating platters, retains them when power…
- A.
A & B only
- B.
A & C only
- C.
B & C only
- D.
A, B & C
Show answer & explanation
Correct answer: C
Concept
A hard-disk drive is an electromechanical secondary-storage device. It stores bits as magnetic patterns on rotating platters, retains them when power is removed, and uses moving components to position the read/write heads.
Application
Statement A says that an HDD has no moving parts. A conventional HDD has spinning platters, a spindle motor, and an actuator arm, so this statement is false.
Statement B says that an HDD is non-volatile. The magnetic patterns remain on the platters after power is switched off, so this statement is true.
Statement C says that an HDD uses magnetic properties to store data. Its read/write heads encode and sense magnetic regions on the platter surfaces, so this statement is true.
Cross-check and contrast
A and B only includes the no-moving-parts claim, which conflicts with the electromechanical construction of an HDD.
A and C only also includes the no-moving-parts claim, despite the rotating platter and actuator mechanism.
A, B and C includes the no-moving-parts claim along with the two storage properties.
Therefore, statements B and C only are correct.