Input and Output Questions and Answers

Q: __________ is used to captures images in a digitized form that a computer can use.

Correct answer: Digital CameraA digital camera focuses the image onto a sensor array, which converts light into charge and then into digital values, so what it captures is already in the form the computer needs.A film camera captures an image too, but chemically, and it must be developed and then scanned before a computer can use it. A memory card only stores what the camera produced, and an indicator LED on the case captures nothing at all.

Q: Printer resolution is measured in ________.

Correct answer: Dots per inchDots per inch counts how finely a printer can place ink or toner on the page, so a higher figure gives sharper text and images. Pixels per inch is the corresponding measure for a display, and characters per second measures speed rather than quality.

Q: These devices provide a means of communication between a computer and outer world.

Correct answer: I/OInput and output devices are the interface between the machine and everything outside it - users, other machines, and the physical world.Without them a computer could compute but neither receive a problem nor report an answer. They are also called peripherals, because they surround the processor and memory rather than forming part of them. Storage devices are a special case, communicating with the machine's own long-term memory rather than with the world.

Q: The I/O devices are sometimes called the peripheral devices because they surround the CPU and memory of the computer system.

Correct answer: TrueThe name is literal: peripheral means "at the edge", and these devices sit outside the processor and main memory, connected through controllers, buses and ports.The distinction is architectural rather than physical. A hard disk inside the case is still a peripheral, because it is reached through a controller rather than being addressed directly as memory is. What defines the core is direct access by the processor; everything else surrounds it.

Q: What does GUI stand for?

Correct answer: Graphical User InterfaceA graphical user interface presents the system as windows, icons, menus and a pointer, so that operations are performed by direct manipulation rather than by typing commands.The contrast is with the command line interface, which requires the user to know and type the command names. The graphical form is what made computers usable without training, and the pointing devices in this topic - mouse, trackball, touch screen - exist to serve it.

Q: Which of the following is not a point-and-draw device?

Correct answer: KeypadA keypad has discrete keys and enters characters or digits; it cannot indicate an arbitrary position on the screen or trace a path, which is what point-and-draw means.The other three all can. A mouse and a trackball report continuous movement, and a touch screen reports the position touched directly. Arrow keys move a cursor in fixed steps, which is why they serve as a poor substitute for a pointing device rather than as one.

Q: A device used for video games, flight simulators, training simulators and for controlling industrial robots.

Correct answer: JoystickA joystick reports the direction and extent of the lever's deflection, and often twist and several buttons besides - a continuous two-axis input that suits steering something.That is exactly what games, flight simulators and industrial robot controls need: an intuitive mapping from hand movement to the movement of the thing controlled. A mouse suits a flat desk and absolute positioning, a light pen points at a screen, and a keyboard enters characters.

Q: The unattended interactive information systems such as automatic teller machine or ATM is called as _________

Correct answer: KiosksA kiosk is an unattended interactive terminal placed in a public space - a cash machine, a ticket machine, an information point, a self-service checkout.Its design follows from being unattended: a simplified interface for users with no training, hardened input devices such as touch screens and sealed keypads, and physical security for whatever it dispenses. The other options are not words. The term is borrowed from the small structures such machines were first placed in.

Q: Which are the input devices that enable direct data entry into a computer system from source documents?

Correct answer: Data Scanning devicesData scanning devices read the source document itself, so the data never has to be transcribed - optical mark readers, optical character readers, bar code readers and magnetic ink character readers all belong to the class.The gain is accuracy as much as speed: manual keying introduces errors at a rate that matters when the volume is large, and reading the original removes that step entirely. The other three options are not established categories.

Q: Which of the following is a type of image scanner?

Correct answer: Flat-bedA flat-bed scanner holds the document face down on a glass platen while a moving carriage carrying the light source and sensor traverses beneath it.The arrangement suits bound books and fragile originals, since nothing is dragged through rollers. The other genuine type is the hand-held scanner, moved across the document by the user - and "hand-led" in the options is a misspelling of it, as "flat-held" is of the answer. Sheet-fed scanners are the third common form.

41.

__________ is used to captures images in a digitized form that a computer can use.

A.Camera
B.LED on Front Panel of System Box
C.Digital Camera
D.Memory Card

Answer: C

Correct answer: Digital Camera

A digital camera focuses the image onto a sensor array, which converts light into charge and then into digital values, so what it captures is already in the form the computer needs.

A film camera captures an image too, but chemically, and it must be developed and then scanned before a computer can use it. A memory card only stores what the camera produced, and an indicator LED on the case captures nothing at all.

Discuss in Forum

42.

Printer resolution is measured in ________.

A.Pixels per inch
B.Dots per inch
C.Characters per second
D.Hertz

Answer: B

Correct answer: Dots per inch

Dots per inch counts how finely a printer can place ink or toner on the page, so a higher figure gives sharper text and images. Pixels per inch is the corresponding measure for a display, and characters per second measures speed rather than quality.

Discuss in Forum

43.

These devices provide a means of communication between a computer and outer world.

A.I/O
B.Storage
C.Compact
D.Drivers

Answer: A

Correct answer: I/O

Input and output devices are the interface between the machine and everything outside it - users, other machines, and the physical world.

Without them a computer could compute but neither receive a problem nor report an answer. They are also called peripherals, because they surround the processor and memory rather than forming part of them. Storage devices are a special case, communicating with the machine's own long-term memory rather than with the world.

Discuss in Forum

44.

The I/O devices are sometimes called the peripheral devices because they surround the CPU and memory of the computer system.

A.True
B.False

Answer: A

Correct answer: True

The name is literal: peripheral means "at the edge", and these devices sit outside the processor and main memory, connected through controllers, buses and ports.

The distinction is architectural rather than physical. A hard disk inside the case is still a peripheral, because it is reached through a controller rather than being addressed directly as memory is. What defines the core is direct access by the processor; everything else surrounds it.

Discuss in Forum

45.

What does GUI stand for?

A.Graphical User Instruction
B.Ground User Interface
C.General User Instruction
D.Graphical User Interface

Answer: D

Correct answer: Graphical User Interface

A graphical user interface presents the system as windows, icons, menus and a pointer, so that operations are performed by direct manipulation rather than by typing commands.

The contrast is with the command line interface, which requires the user to know and type the command names. The graphical form is what made computers usable without training, and the pointing devices in this topic - mouse, trackball, touch screen - exist to serve it.

Discuss in Forum

46.

Which of the following is not a point-and-draw device?

A.Keypad
B.Trackball
C.Touch screen
D.Mouse

Answer: A

Correct answer: Keypad

A keypad has discrete keys and enters characters or digits; it cannot indicate an arbitrary position on the screen or trace a path, which is what point-and-draw means.

The other three all can. A mouse and a trackball report continuous movement, and a touch screen reports the position touched directly. Arrow keys move a cursor in fixed steps, which is why they serve as a poor substitute for a pointing device rather than as one.

Discuss in Forum

47.

A device used for video games, flight simulators, training simulators and for controlling industrial robots.

A.Mouse
B.Light pen
C.Joystick
D.Keyboard

Answer: C

Correct answer: Joystick

A joystick reports the direction and extent of the lever's deflection, and often twist and several buttons besides - a continuous two-axis input that suits steering something.

That is exactly what games, flight simulators and industrial robot controls need: an intuitive mapping from hand movement to the movement of the thing controlled. A mouse suits a flat desk and absolute positioning, a light pen points at a screen, and a keyboard enters characters.

Discuss in Forum

48.

The unattended interactive information systems such as automatic teller machine or ATM is called as _________

A.Kiosks
B.Sioks
C.Cianto
D.Kiaks

Answer: A

Correct answer: Kiosks

A kiosk is an unattended interactive terminal placed in a public space - a cash machine, a ticket machine, an information point, a self-service checkout.

Its design follows from being unattended: a simplified interface for users with no training, hardened input devices such as touch screens and sealed keypads, and physical security for whatever it dispenses. The other options are not words. The term is borrowed from the small structures such machines were first placed in.

Discuss in Forum

49.

Which are the input devices that enable direct data entry into a computer system from source documents?

A.Data Scanning devices
B.Data retrieving devices
C.Data acquiring devices
D.System Access devices

Answer: A

Correct answer: Data Scanning devices

Data scanning devices read the source document itself, so the data never has to be transcribed - optical mark readers, optical character readers, bar code readers and magnetic ink character readers all belong to the class.

The gain is accuracy as much as speed: manual keying introduces errors at a rate that matters when the volume is large, and reading the original removes that step entirely. The other three options are not established categories.

Discuss in Forum

50.

Which of the following is a type of image scanner?

A.Flat-held
B.Hand-led
C.Flat-bed
D.Compact

Answer: C

Correct answer: Flat-bed

A flat-bed scanner holds the document face down on a glass platen while a moving carriage carrying the light source and sensor traverses beneath it.

The arrangement suits bound books and fragile originals, since nothing is dragged through rollers. The other genuine type is the hand-held scanner, moved across the document by the user - and "hand-led" in the options is a misspelling of it, as "flat-held" is of the answer. Sheet-fed scanners are the third common form.

Discuss in Forum

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