DBMS-Physical Data Organization
DBMS-Physical Data Organization
61. Head activation time is the time:
- from when a read or write request is issued to when data transfer begins
- amount of time required to transfer data from the disk to or from main memory
- required to electronically activate the read/write head over the disk surface where data transfer is to take place
- None of these
62. Which of the following is a factor that affects the access time of hard disks?
- rotational delay time
- data transfer time
- seek time
- all of these
63. Which is the least expensive secondary storage device?
- zip disk
- hard disk
- magnetic tape
- none of these
64. Which of the following is not a flexible disks?
- optical disk
- zip disk
- hard disk
- jaz disk.
66. WORM stands for:
- Write Once Read Many
- Write Optical Read Magnetic
- Write On Redundant Material
- None of these
67. What is the expansion of ISAM?
- Indexed Sequential Access Method
- Internal Storage Access Mechanism
- Integrated Storage and Management
- None of these
68. What is the expansion o VSAM?
- Very Stable Adaptive Machine
- Varying Storage Access Mechanism
- Virtual Storage Access Method
- Noneof these