Magnetic Disk and Flash Storage - DBMS

1.

________ 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

Answer: Option 'A'

Access time

2.

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

Answer: Option 'D'

Disk arm

3.

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

Answer: Option 'A'

Checksum

4.

In Flash memory, the erase operation can be performed on a number of pages, called an _______, at once, and takes about 1 to 2 milliseconds.

   A.) Delete block
   B.) Erase block
   C.) Flash block
   D.) Read block

Answer: Option 'B'

Erase block

5.

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

Answer: Option 'C'

Seek time

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