IT &computer MCQ section 1 MCQ Questions & Answers Detailed Explanation

Answer: (a)

A software bug is an error, flaw, failure, or fault in a computer program or system that causes it to produce an incorrect or unexpected result, or to behave in unintended ways.

Answer: (b)

A sound synthesizer is an electronic instrument capable of producing a wide range of sounds. Synthesizers may either imitate other instruments ("imitative synthesis") or generate new timbres.

They can be played (controlled) via a variety of different input devices (including keyboards, music sequencers and instrument controllers). Synthesizers generate electric signals (waveforms), and can finally be converted to sound through loudspeakers or headphones.

Answer: (b)

Cache memory is a very high-speed semiconductor memory that can speed up the processor or CPU. It acts as a buffer between the CPU and main memory (RAM).

It is used to hold those parts of data and programs which are most frequently used by the CPU. The parts of data and programs are transferred from disk to cache memory by the operating system, from where the CPU can access them.

Answer: (b)

An interpreter translates one instruction at a time, and then executes that instruction immediately. It directly executes, i.e. performs, instructions written in a programming or scripting language, without previously compiling them into a machine language program.

Answer: (d)

The parity bit is a term used to identify whether a data word has an odd or even number of 1’s. If a data word contains an odd number of 1’s, the word is said to have odd parity.

The binary word 0110111 with five 1’s has odd parity. The binary word 0110000 has an even number of 1’s (two), so it has even parity.

Answer: (d)

The most famous Disk Operating System (DOS) commands are: dir (lists the contents of a folder), format (formats the given drive), type (displays the contents of a file), etc.