AIU Faculty of Informatics CS - Chapter 5 Storage Mediums Quiz

Storage Media

• Data is saved on permanent storage media to retain it even when the power is turned off.
• Examples of storage media include hard disks, USB flash drives, and memory cards.
• CDs and DVDs are not mentioned as examples of storage media.

Access Time

• Access time is measured in milliseconds (ms).
• It is the time taken to access data from a storage device.
• The function of access time is to determine how quickly a storage device can retrieve data.

Hard Disks

• Hard disks have much greater storage capacity than USB flash drives.
• Most hard disks are housed in a computer's casing.
• External hard disks are connected to a computer using a cable, whereas removable hard disks are inserted into a slot on the computer.
• The main components of a hard disk include the platters, read/write head, and actuator.
• The controller is responsible for receiving instructions from the CPU in a hard disk.
• A cluster is a group of sectors on a hard disk that are treated as a single unit for storage purposes.
• Hard disks are formatted at the factory level during manufacturing.

Memory Cards

• Memory cards are a type of solid-state drive.
• The storage capacity range of memory cards is 1MB to 1GB.
• The purpose of formatting a hard disk after purchase is to prepare it for use.

Input Devices

• The main function of an input device is to provide data to the computer.
• Arrow keys on a keyboard are used for moving within files and internet pages.
• The numeric keypad on a keyboard is used for fast and easy data entry.
• A pointing device, such as a mouse, fits comfortably under the palm of the hand and has right and left buttons.
• A touchpad is a type of input device that is sensitive to pressure and motion.
• A touchscreen is a type of input device that is used to touch a flat surface, such as a screen of a computer, smart device, or tablet device.
• A game controller is a type of input device used for PC games and gaming consoles.
• A webcam is a type of device that allows users to capture still images or videos of the environment, and store them in digital form.
• A webcam is connected to the computer and used to broadcast still images or videos on the internet.

Pointing Devices

• The main purpose of a pointing device is to control the cursor on the screen.
• A touch-sensitive screen allows the user to interact with the computer by tapping, pinching, and swiping on the screen.

Optical Scanners

• An optical scanner reads data from a printed page and converts it into digital form.