Computer & IT

note!Answer: A) information
Data processing converts raw data into meaningful information, which is its product.

note!Answer: B) writing
Writing means storing data into a memory or storage location; reading means retrieving it.

note!Answer: A) reading
Reading copies data from memory without erasing it; writing stores data into memory.

note!Answer: A) program
A program is a set of instructions that tells the computer what to do.

note!Answer: C) control unit; arithmetic logic unit and primary storage
The CPU is made up of the control unit, the arithmetic logic unit (ALU) and primary storage (memory).

note!Answer: D) super computer
Supercomputers are the most powerful class of computers for very large computations.

note!Answer: D) application software
Application software is designed to meet specific user tasks such as payroll or word processing.

note!Answer: B) line printer
A printer produces a hardcopy (printed paper output); a line printer is a classic example.

note!Answer: D) output device
Output devices present processed results in a human-readable form, such as screens or printers.

note!Answer: B) storage
Memory is a storage component that holds data and instructions.

note!Answer: A) object
A program already in machine code, ready to execute, is called an object program.

note!Answer: B) LSI chips
Modern computers use LSI/VLSI integrated circuit chips, not vacuum tubes or cores.

note!Answer: A) byte
8 bits form one byte; a nibble is 4 bits.

note!Answer: D) program
General-purpose computers are versatile because their behavior is set by the program they run.

note!Answer: A) C̄ + AB̄
(A+C')(B'+C') = AB' + AC' + B'C' + C' = C' + AB' by absorption.

note!Answer: A) 0.625
0.101 in binary = 1/2 + 0/4 + 1/8 = 0.5 + 0.125 = 0.625.

note!Answer: A) Semiconductor memory
Semiconductor memory is primary (main) memory, while disks, drums and tapes are secondary storage devices.

note!Answer: B) bus
A bus is a shared set of wires that connects several devices and carries data, address and control signals.

note!Answer: A) a device which is not connected to CUP
An offline device is not directly connected to, or under the control of, the CPU.

note!Answer: A) CPU
The CPU operates at electronic speeds, far faster than magnetic media, terminals, or mechanical devices.