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.

View solution

Q. There are “record-once” versions of compact disk and digital video disk, which can be written only once; such disks are also called __________ disks.

View solution

Q. Tape storage is referred to as __________ storage.

View solution

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

View solution

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

View solution

Q. The disk platters mounted on a spindle and the heads mounted on a disk arm are together known as ___________

View solution

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

View solution

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

View solution

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

View solution

Q. _________ is around one-half of the maximum seek time.

View solution

Q. Once the head has reached the desired track, the time spent waiting for the sector to be accessed to appear under the head is called the _______________

View solution

Q. 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.

View solution

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.

View solution

Q. ______________ partitiones data and parity among all N+1 disks, instead of storing data in N-disks and parity in one disk.

View solution

Q. Hardware RAID implementations permit _________ that is, faulty disks can be removed and replaced by new ones without turning power off.

View solution

Q. ______________ which increases the number of I/O operations needed to write a single logical block, pays a significant time penalty in terms of write performance.

View solution

Q. A unit of storage that can store one or more records in a hash file organization is denoted as

View solution

Q. The file organization which allows us to read records that would satisfy the join condition by using one block read is

View solution

Q. What are the correct features of a distributed database?

View solution

Q. Each tablespace in an Oracle database consists of one or more files called

View solution