Computer & IT

note!Answer: D) 10001001
Even parity requires an even number of 1s. 10001001 has three 1s, which is odd, so it contains an error.

note!Answer: A) 3
A code with minimum Hamming distance d corrects up to floor((d-1)/2) errors. For d = 8 that is floor(7/2) = 3.

note!Answer: C) ASCII
ASCII stores each digit as a separate character code, so numeric values take more space and are not stored in a compact binary form. The other systems store numbers directly in binary.

note!Answer: B) MIDI
MIDI is a standard for encoding musical notes and instructions. ASCII is for text, while JPEG and GIF are image formats.

note!Answer: A) optical scanner
An optical scanner is an input device, while plotters, speakers and printers are output devices.

note!Answer: D) high-level language
BASIC, COBOL and FORTRAN are human-readable programming languages, which makes them high-level languages.

note!Answer: A) FORTRAN
FORTRAN (Formula Translation) was designed for scientific and engineering calculations.

note!Answer: B) COBOL
COBOL (Common Business Oriented Language) was developed for business data processing.

note!Answer: A) machine language
Machine language consists only of binary 0s and 1s, which makes writing programs in it very difficult.

note!Answer: A) system software
System software controls and runs the computer and executes application programs.

note!Answer: B) application software
MS Office, Tally and Flash are programs built for end-user tasks, which makes them application software.

note!Answer: D) Ms-word
MS Word is application software, whereas Windows, Linux and Unix are operating systems, which are system software.

note!Answer: D) 1024 MB
1 GB = 1024 MB, and 1 MB = 1024 KB. Option b describes 1 MB, not 1 GB.

note!Answer: D) 10 Ghz
10 GHz is the largest clock speed listed, so it is the fastest.

note!Answer: B) Mhz
Processor clock speed is measured in megahertz (MHz) or gigahertz (GHz).

note!Answer: D) all of above
The CPU consists of the control unit, the arithmetic and logic unit (ALU), and registers or memory unit.

note!Answer: D) speaker
A speaker is an output device and cannot store data, while the other options are storage media.

note!Answer: B) ALU
The Arithmetic and Logic Unit (ALU) performs mathematical calculations and logical operations.

note!Answer: D) ROM
ROM is primary memory, which is built into the computer. Hard disks, CDs and pen drives are secondary storage.

note!Answer: A) AND
AND gives output 1 for only one of the four input combinations (1,1), while OR, XOR give 1 for three or two.