What type of device converts digital signals into a form that is intelligible to the user?
- A.Storage devices
- B.Keyboards
- C.Input devices
- D.Output devices
Correct answer
Explanation
The correct answer is D, Output devices. A computer works on binary digital signals, and an output device turns the processed result into a form a person can see, hear or hold: a monitor shows it as a picture, a printer puts it on paper, a speaker turns it into sound and a plotter draws it. That is why the monitor and printer are the two output devices named in every syllabus. Option A is wrong because storage devices such as a hard disk, SSD or pen drive only hold data for later use; they do not present it to the user. Option B is wrong because a keyboard is an input device, and it does the opposite job, turning key presses into signals for the machine. Option C is wrong for the same reason: input devices such as the mouse, scanner and microphone feed data in. Exam tip: monitor and printer are output, keyboard and mouse are input, a touch screen is both.
Practice Questions
View allWhich language uses the symbolic representation of machine codes needed to program a particular processor or processor family?
- A.Machine Language
- B.Assembly Language
- C.High-Level Language
- D.All of the above
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Assembly language replaces the binary machine codes of a processor with short symbols called mnemonics, such as MOV, ADD and JMP.
Read the full explanation →Which one of the following is the characteristic of Artificial Intelligence ?
- A.Replicates human decision making
- B.Stores relevant information
- C.Stores similar kind of data for a specific purpose
- D.Allows user to interact with media
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Artificial Intelligence is the ability of a machine to perform tasks that normally need human intelligence, such as reasoning, learning and taking decisions.
Read the full explanation →What is an interactive combination of text, graphics, video, audio and images termed as ?
- A.JPEG
- B.Multimedia
- C.AVA
- D.PNG
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Multimedia means using several forms of media, such as text, graphics, audio, video, images and animation, together, often in a way the user can interact with.
Read the full explanation →Which among the following is a malicious software?
- A.Hacking
- B.Password Cracking
- C.Trojan Horse
- D.Firewall
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A Trojan is a program that looks useful or harmless but secretly carries harmful code, so it is a piece of malicious software, or malware.
Read the full explanation →Which one of the following is not an application software?
- A.Spreadsheet
- B.AutoCAD
- C.MS PowerPoint
- D.Linker
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A linker is system software, a programming tool that joins compiled pieces of code into one program that can run; it does not do a task for the end user.
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