In DASD, what is the full form of 'A'?
- A.Access
- B.Around
- C.Accessible
- D.Arithmetic
Correct answer
Explanation
The correct answer is A, Access. DASD stands for Direct Access Storage Device. It is any storage device on which the read-write head can be sent straight to the place where a record is kept, so a file can be reached without passing over everything stored before it. Hard disk drives, floppy disks, CDs, DVDs and drums are direct access devices, and the term was coined by IBM for the disk units of its mainframes. The opposite is SASD, a sequential access storage device such as magnetic tape, where the tape must be wound past every earlier record. Direct access is what makes random reads and updates possible, which is why databases sit on disks and not on tape. Options B, C and D are wrong because Around, Accessible and Arithmetic do not appear in the expansion; Arithmetic belongs to ALU, the arithmetic logic unit of the CPU. Exam tip: DASD is disk and direct, SASD is tape and sequential.
Practice Questions
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- B.Assembly Language
- C.High-Level Language
- D.All of the above
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- C.AVA
- D.PNG
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- B.Password Cracking
- C.Trojan Horse
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- D.Linker
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