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Computer Science

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251

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Malware Types

easy
Computer Science

A program that performs a useful task while simultaneously allowing destructive acts is a ____?

A
Worm.
B
Trojan horse.
C
Virus.
D
Macro virus
Explanation and memory cue

A Trojan horse is a type of malicious program that appears to perform a useful or legitimate function but also allows destructive acts, such as compromising data or security, to occur in the background.

252

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Cybersecurity Basics

easy
Computer Science

A person who uses his or her expertise to gain access to other people’s computers to obtain information illegally or cause damage is called a ____.

A
Hacker
B
spammer
C
instant messenger
D
programmer
Explanation and memory cue

A hacker is someone who uses their expertise to gain unauthorized access to other people's computers, often to steal information or cause damage. The other options do not fit this description.

253

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Number Systems

easy
Computer Science

A number system that has eight different symbols to represent any quantity is known as what?

A
Binary
B
Octal
C
Decimal
D
Hexadecimal
Explanation and memory cue

The octal number system uses eight different symbols (0 to 7) to represent any quantity. This distinguishes it from binary (2 symbols), decimal (10 symbols), and hexadecimal (16 symbols).

254

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Input Devices

easy
Computer Science

A light-sensitive device that converts drawings, printed text, or other images into digital form is called a ____.

A
Keyboard
B
Scanner
C
OMR
D
None of these
Explanation and memory cue

A scanner is a light-sensitive device that converts drawings, printed text, or other images into digital form by capturing their image and storing it electronically.

255

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Programming Languages

easy
Computer Science

Which program can execute high-level language programs directly?

A
Compiler
B
Interpreter
C
Sensor
D
Circuitry
Explanation and memory cue

An interpreter is a program that directly executes instructions written in a high-level programming language, without requiring them to be compiled into machine code first.

256

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Ms Office Features

easy
Computer Science

A feature of MS Office that saves the document automatically after a certain interval is called ____?

A
Save
B
Save As
C
Auto save
D
None of the above
Explanation and memory cue

The feature in MS Office that automatically saves the document at regular intervals is called 'AutoSave.' This helps prevent data loss in case of unexpected shutdowns or crashes.

257

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Storage Devices

easy
Computer Science

A normal CD-ROM can usually store up to how much data?

A
680 KB
B
680 Bytes
C
680 MB
D
60 GB
Explanation and memory cue

A standard CD-ROM typically stores up to 680 MB of data. The other options are either too small or too large for a normal CD-ROM's capacity.

258

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Operating Systems

easy
Computer Science

A program that acts as an intermediary between a user of a computer and the computer hardware is called:

A
Utility Software
B
Computer Software
C
Operating System
D
Application Software
Explanation and memory cue

An operating system acts as an intermediary between the user and the computer hardware, managing resources and providing a user interface.

259

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Computer Hardware

easy
Computer Science

A device that is not connected to the CPU is called a(n) ____?

A
land-line device
B
On-line device
C
Off-line device
D
Device
Explanation and memory cue

An off-line device is not directly connected to the CPU and operates independently, unlike on-line devices which are directly connected and interact with the CPU in real time.

260

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Operating Systems - Deadlock

easy
Computer Science

A set of processes is in deadlock if:

A
each process is blocked and will remain so forever
B
each process is terminated
C
all processes are trying to kill each other
D
None of these
Explanation and memory cue

A deadlock occurs when each process in a set is blocked, waiting for an event that can only be triggered by another blocked process in the same set. As a result, none of the processes can proceed, and they remain blocked forever.