Computer Fundamentals Questions and Answers

Answer: B

Correct answer: NAT

NOR, AND and XOR are logic gates - circuits that produce an output from one or more binary inputs. NAT is Network Address Translation, the technique a router uses to map private addresses onto a public one, and is not a gate at all.

Answer: D

Correct answer: Buses

A bus is the set of parallel conductors along which the processor, memory and controllers exchange information - the address bus carrying the location, the data bus the value, and the control bus the timing signals. Bays hold drives, flash memory stores data, and CMOS keeps the setup settings.

Answer: A

Correct answer: Videsh Sanchar Nigam Ltd

VSNL stood for Videsh Sanchar Nigam Limited, the state-owned company that carried India’s international telecommunications and provided the country’s first public internet access in 1995. It was sold to the Tata group in 2002 and later renamed Tata Communications.

Answer: A

Correct answer: Arithmetic logic unit

ALU stands for arithmetic logic unit - the part of the processor that performs the arithmetic (add, subtract, multiply) and the logical operations (AND, OR, NOT and comparisons). The control unit decides which operation it performs and supplies the operands.

Answer: A

Correct answer: Laser disks

On an optical disk the data is recorded as microscopic pits pressed into a reflective layer; a laser beam scans the track and detects the change in reflection at each pit edge. Tape and punched cards store data magnetically and mechanically, and a RAM cartridge holds it electronically.

Answer: B

Correct answer: Sequential

Tape is a long strip that can only be wound past the head from one end towards the other, so reaching a particular record means passing over everything recorded before it - sequential access. Direct and random access require a medium whose parts can be reached in any order, such as a disk.

Answer: B

Correct answer: 8

The first microcomputers were built on 8-bit processors - the Intel 8080, the Motorola 6800, the MOS 6502 and the Zilog Z80. Eight bits is one byte, so a register held \( 2^8 = 256 \) distinct values, and the 16-bit address bus reached 64 KB of memory.

Answer: B

Correct answer: Schema

The schema is the complete description of the database’s structure - every table, the columns and data types within it, the keys and the constraints. It is defined once and stored in the data dictionary; the records are the data that then fills that structure.

Answer: A

Correct answer: 8080 microprocessor

The Intel MCS-80 was the family of chips built around the 8080 microprocessor, introduced in 1974 - an 8-bit processor with a 16-bit address bus reaching 64 KB of memory. The 8085 and the 16-bit 8086 belong to the later MCS-85 and iAPX 86 families.

Answer: C

Correct answer: Java

Google, AltaVista and Lycos are web search engines. Java is a programming language, so it does not belong with them.