Database Management System (DBMS) MCQs with answers Page - 70

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Admin • 833.24K Points
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Q. The primary medium for the long-term online storage of data is the where the entire database is stored on magnetic disk.

  • (A) semiconductor memory
  • (B) magnetic disks
  • (C) compact disks
  • (D) magnetic tapes

A

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Q. Optical disk systems contain a few drives and numerous disks that can be loaded into one of the drives automatically (by a robot arm) on demand.

  • (A) tape storage
  • (B) jukebox
  • (C) flash memory
  • (D) all of the mentioned

A

Admin • 833.24K Points
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Q. There are “record-once” versions of the compact disk and digital video disk, which can be written only once; such disks are also called disks.

  • (A) write-once, read-many (worm)
  • (B) cd-r
  • (C) dvd-w
  • (D) cd-rom

A

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Q. In magnetic disk stores information on a sector magnetically as reversals of the direction of magnetization of the magnetic material.

  • (A) read–write head
  • (B) read-assemble head
  • (C) head–disk assemblies
  • (D) disk arm

A

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Q. A is the smallest unit of information that can be read from or written to the disk.

  • (A) track
  • (B) spindle
  • (C) sector
  • (D) platter

A

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Q. The disk controller uses at each sector to ensure that the data is not corrupted on data retrieval.

  • (A) checksum
  • (B) unit drive
  • (C) read disk
  • (D) readsum

A

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Q. is the time from when a read or write request is issued to when data transfer begins.

  • (A) access time
  • (B) average seek time
  • (C) seek time
  • (D) rotational latency time

A

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Q. The time for repositioning the arm is called the and it increases with the distance that the arm must move.

  • (A) access time
  • (B) average seek time
  • (C) seek time
  • (D) rotational latency time

A

Admin • 833.24K Points
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Q. is around one-half of the maximum seek time.

  • (A) access time
  • (B) average seek time
  • (C) seek time
  • (D) rotational latency time

A

Admin • 833.24K Points
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Q. Hybrid disk drives are hard-disk systems that combine magnetic storage with a smaller amount of flash memory, which is used as a cache for frequently accessed data.

  • (A) hybrid drivers
  • (B) disk drivers
  • (C) hybrid disk drivers
  • (D) all of the mentioned

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