Explanation

• Embedded computer software is designed to control a specific hardware device.
• It is stored inside electronic devices and performs dedicated functions.
• Embedded software works with hardware such as washing machines, cars, cameras, and medical devices.
• It is usually designed for specific tasks.
• Examples include firmware in routers, printers, and smart appliances.

Last verified on 07-08-2026

Explanation

• Ferric oxide is most commonly used for making magnetic recording tape.
• Magnetic tapes contain a coating of magnetic material that stores audio, video, or data signals.
• Ferric oxide (Fe₂O₃) is a commonly used magnetic compound due to its magnetic properties.
• It was widely used in audio tapes, video tapes, and data storage tapes.

Last verified on 07-08-2026

Explanation

• The output quality of a printer is measured by Dot Per Inch (DPI).
• DPI indicates the number of dots a printer can produce in one inch.
• A higher DPI generally means higher print resolution and sharper output.
• Common printer resolutions include 300 DPI, 600 DPI, and 1200 DPI.

Last verified on 07-08-2026

Explanation

• A Voice Response Unit (VRU) is an output device that produces an audio response using words or messages recorded on a magnetic medium.
• It converts stored voice messages into audible output for the user.

Additional information:

• Voice Recognition Unit is an input device used to recognize spoken words.
• Magnetic tape is a storage medium.

Last verified on 07-08-2026

Explanation

• The Operating System is built directly on the hardware.
• It acts as an interface between the computer hardware and application software.
• The OS manages resources such as the CPU, memory, storage, and input/output devices.
• Application software runs on top of the operating system.
• Examples of operating systems include Windows, Linux, macOS, and Android.

Last verified on 07-08-2026