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  • Suraku Academy | Input-Output Ports Solved MCQs & PYQs Bank

Q: 1 Pen drive is one of the most popularly used device and can be used in _______ port.

  1. SSD

  2. USB

  3. UBS

  4. SD

[ Option B ]

A pen drive, also called a USB (Universal Serial Bus) flash drive, is designed to be inserted into a USB port on computers, laptops, and many other devices.
The USB port allows easy plug-and-play functionality for transferring or storing data, making it the most common interface for pen drives.

PORT NAMEUSED FORCOMMON DEVICES
USB (Universal Serial Bus) PortData transfer and power supply between computer and external devices.Pen drives, keyboards, mice, printers, external hard drives, mobile phones.
HDMI (High Definition Multimedia Interface) PortTransmits high-quality audio and video signals.Monitors, projectors, TVs, gaming consoles.
VGA (Video Graphics Array) PortTransfers analog video signals.Monitors, older projector.
Ethernet Port (LAN Port (RJ-45))Connects computer to wired networks.Network cables, routers, switches.
Audio Port (3.5mm Jack)Sends or receives analog audio signals.Headphones, microphones, speakers.
Thunderbolt PortHigh-speed data transfer, video, and power in one cable.External SSDs, displays, docking stations.
SD (Secure Digital) Card SlotReads and writes data from SD memory cards.Cameras, smartphones, SD cards.
PS/2 (Personal System/2) PortConnects input devices (older interface).Keyboards and mice (legacy systems).

Q: 2 A set of wires which carries a group of bits simultaneously, that is, in parallel, and has an associated control scheme is known as:

  1. Wires

  2. Data Cables

  3. Bus

  4. Registers

[ Option C ]

A Bus in a computer is a communication system that transfers data, addresses, and control signals between components like the CPU, memory, and I/O devices.

Q: 3 Which of the following is NOT an input device of computer?

  1. Trackball

  2. Image Scanner

  3. Joystick

  4. Monitor

[ Option D ]

An input device is a hardware device used to provide data and control signals to a computer. It allows users to enter information into the computer system for processing.

Input Devices and Their Functions:

DeviceFunction
KeyboardInputs text, numbers, and commands into the computer.
MouseControls the cursor and helps interact with the graphical interface.
MicrophoneCaptures audio input for processing or communication.
ScannerConverts physical documents or images into digital format.
JoystickProvides directional control for games or specialized uses.
TrackballMoves cursor by rolling a ball on the device.
WebcamCaptures live video input for conferencing or recording.
TouchpadFinger movement sensor to control cursor, common in laptops.
StylusPen-like device used to write or draw on touchscreens.
Optical Character Recognition (OCR)Scans printed or handwritten text and converts it into machine-readable digital text. Useful for digitizing documents.
Optical Mark Reader (OMR)Detects marks such as pencil shading on predefined areas, commonly used for multiple-choice answer sheets.
Light PenDetects light or screen position for direct interaction with screen content.
Bar Code Reader (BCR)Reads bar coded data and converts it into digital alphanumeric data.

Output Devices and Their Functions:

DeviceFunction
MonitorDisplays visual output such as text, images, and videos.
PrinterProduces hard copies of digital documents on paper.
SpeakersConvert audio signals into sound output for the user.
ProjectorProjects images or videos on larger screens for viewing.
HeadphonesDeliver audio output directly to the user's ears.
PlotterProduces high-precision drawings and graphics on paper.

Devices with Both Input and Output Functions:

DeviceFunction
Touchscreen MonitorDisplays visual output and accepts touch input for interaction.
HeadsetsCombine headphones (output) and microphones (input) for audio communication.

Q: 4 In data transfer by peripheral devices, which of the following statement is correct?

  1. CPU is kept in loop to check whether data is available.

  2. CPU assumes that a peripheral is always available.

  3. SOD pin is used.

  4. When a peripheral is ready, it sends interrupt signal to the CPU to transfer data.

[ Option D ]

Data Transfer by Peripheral Devices

  • In computer systems, peripheral devices (like keyboards, printers, disks) communicate with the CPU to transfer data.
  • There are different methods of data transfer: Programmed I/O (polling), Interrupt-Driven I/O, and DMA.
  • In interrupt-driven I/O, the peripheral notifies the CPU only when it is ready, so the CPU does not waste time checking repeatedly.
  • This improves efficiency compared to polling, where the CPU continuously checks the device.

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