281. DOS was introduced by
(A) IBM
(B) Xerox
(C) Microsoft
(D) Bell labs

282. Which of the following operating system is based on open-source software?
(A) UNIX
(B) Windows 2000
(C) Windows NT
(D) Linux

283. The amount of time taken by a device to begin reading data is called
(A) Seek time
(B) Read time
(C) Access time
(D) Write time

284. The RAID technology that contributes to fault tolerance is called
(A) Disk mirroring
(B) Tolerant computing
(C) Data striping
(D) None Of These

285. MAN stands for?
(A) Metropolitan Arranged Network
(B) Marked Area Network
(C) Manufactured Arrangements of Networks
(D) Metropolitan Area Network

286. The most widely used code for representing characters in computers is
(A) ASCII
(B) BCD
(C) EBCDIC
(D) None Of These

287. The type of reader commonly used to read bank cheques is
(A) OPtical-mark reader
(B) Magnetic-ink reader
(C) Bar-code reader
(D) None Of These

288. Which of the following devices stores instructions that help the computer startup?
(A) Keyboard
(B) RAM
(C) ROM
(D) Hard disk

289. The computer can move data and instructions between storage and memory as needed, in a process called

(A) Volatility
(B) Swapping
(C) Pipelining
(D) Exchanging

290. When you press a key, which device notifies the system software?
(A) Keyboard
(B) Keyboard Controller
(C) Keyboard Buffer
(D) Keyboard Handler

NOTE
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