I/O hardware basics in Operating Systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the main component responsible for connecting input and output devices to the computer.

Operating Systems

The device that manages communication between the CPU and peripheral devices is called the [1].

Drag options to blanks, or click blank then click option'

Amotherboard

BI/O controller

CRAM

Dpower supply

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing the motherboard with the I/O controller.

Thinking RAM handles device communication.

The I/O controller is the hardware component that manages communication between the CPU and input/output devices.

2fill in blank

medium

Complete the code to name the type of device that converts data from one form to another for communication.

Operating Systems

A device that converts digital signals to analog signals or vice versa is called a [1].

Drag options to blanks, or click blank then click option'

Arouter

Bprinter

Cmodem

Dscanner

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing a modem with a router.

Thinking a printer or scanner converts signals.

A modem converts digital data from a computer into analog signals for transmission over phone lines and vice versa.

3fill in blank

hard

Fix the error in the statement about data transfer methods.

Operating Systems

Data transfer where the CPU waits for each byte to be transferred is called [1] transfer.

Drag options to blanks, or click blank then click option'

Aprogrammed I/O

Bdirect memory access

Cinterrupt-driven

Dbuffered

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing interrupt-driven which uses CPU interrupts.

Confusing with DMA which bypasses CPU waiting.

Programmed I/O is a method where the CPU actively waits for each data transfer, unlike interrupt-driven or DMA methods.

4fill in blank

hard

Fill both blanks to complete the description of a device that temporarily holds data during transfer.

Operating Systems

A [1] is a small storage area that holds data temporarily, and it helps to [2] speed differences between devices.

Drag options to blanks, or click blank then click option'

Abuffer

Bcache

Cincrease

Dreduce

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing buffer with cache.

Thinking it increases speed differences instead of reducing.

A buffer temporarily stores data and helps reduce speed differences between fast and slow devices during data transfer.

5fill in blank

hard

Fill all three blanks to complete the dictionary comprehension that maps device names to their types, filtering only input devices.

Operating Systems

input_devices = { [1]: [2] for [1], [2] in [3].items() if [2] == 'input' }

Drag options to blanks, or click blank then click option'

Adevice

Bdtype

Cdevices

Ddevice_type

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same variable name for key and value.

Not referencing the original dictionary correctly.

This comprehension creates a dictionary of devices where the type is 'input'. 'device' and 'dtype' are variable names for key and value, and 'devices' is the original dictionary.

Practice

1. Which of the following is an example of an input device in a computer system?

easy

A. Keyboard

B. Monitor

C. Printer

D. Speaker

Solution

1. Step 1: Understand input devices

   Input devices are hardware that send data into the computer, like keyboards or mice.

2. Step 2: Identify the correct device

   Among the options, only the keyboard sends data into the computer.

3. Final Answer:

   Keyboard -> Option A

4. Quick Check:

   Input device = Keyboard [OK]

Hint: Input devices bring data in; keyboard is classic input [OK]

Common Mistakes:

• Confusing output devices as input
• Choosing monitor as input
• Thinking printer inputs data

2. Which of the following correctly describes the function of an output device?

easy

A. Sends data from the computer to the user

B. Sends data from the user to the computer

C. Stores data permanently

D. Processes data inside the CPU

Solution

1. Step 1: Define output device function

   Output devices display or send data from the computer to the user or other devices.

2. Step 2: Match the correct description

   Sends data from the computer to the user correctly states this function, while others describe input, storage, or processing.

3. Final Answer:

   Sends data from the computer to the user -> Option A

4. Quick Check:

   Output device = Sends data out [OK]

Hint: Output devices send data out, like screens or printers [OK]

Common Mistakes:

• Mixing input and output roles
• Thinking output devices store data
• Confusing CPU processing with output

3. Consider this list of devices: Mouse, Monitor, Hard Drive, Printer. Which of these are only output devices?

medium

A. Mouse and Hard Drive

B. Hard Drive and Monitor

C. Mouse and Printer

D. Monitor and Printer

Solution

1. Step 1: Identify device types

   Mouse is input, hard drive is storage, monitor and printer are output devices.

2. Step 2: Select only output devices

   Only monitor and printer are purely output devices from the list.

3. Final Answer:

   Monitor and Printer -> Option D

4. Quick Check:

   Output devices = Monitor, Printer [OK]

Hint: Output devices display or print data, like monitor and printer [OK]

Common Mistakes:

• Including mouse as output
• Confusing hard drive as output
• Mixing input and output devices

4. A user complains that their keyboard is not working. Which of the following is the most likely cause related to I/O hardware?

medium

A. The monitor is turned off

B. The keyboard cable is unplugged

C. The printer is out of paper

D. The CPU is overheating

Solution

1. Step 1: Understand keyboard as input device

   Keyboard sends input data to the computer; if not working, connection issues are common.

2. Step 2: Identify the likely hardware cause

   An unplugged keyboard cable stops input; other options affect different devices or functions.

3. Final Answer:

   The keyboard cable is unplugged -> Option B

4. Quick Check:

   Keyboard issue = Cable unplugged [OK]

Hint: Check cables first for input device problems [OK]

Common Mistakes:

• Blaming monitor for keyboard issues
• Confusing printer problems
• Thinking CPU overheating stops keyboard input

5. A company wants to set up a video conferencing system. Which combination of I/O hardware devices is essential for this setup?

hard

A. Webcam, Keyboard, Hard Drive, Speakers

B. Keyboard, Printer, Scanner, Monitor

C. Microphone, Webcam, Monitor, Speakers

D. Hard Drive, Mouse, Monitor, Printer

Solution

1. Step 1: Identify devices needed for video conferencing

   Video conferencing requires input devices to capture audio/video and output devices to display and play sound.

2. Step 2: Match devices to functions

   Microphone and webcam capture input; monitor and speakers output video and sound. This matches Microphone, Webcam, Monitor, Speakers.

3. Final Answer:

   Microphone, Webcam, Monitor, Speakers -> Option C

4. Quick Check:

   Video conferencing needs input/output devices [OK]

Hint: Video calls need mic, camera, screen, and speakers [OK]

Common Mistakes:

• Choosing storage or printing devices
• Ignoring audio/video input devices
• Mixing unrelated peripherals