Explanation

• Updating involves periodically adding, modifying, or deleting records to maintain accuracy.
• It keeps files and databases current and useful for operations.

• Common in accounting software, student records, and inventory systems.
• Helps prevent data redundancy and errors.

Last verified on 20-01-2026

Explanation

Input devices receive data from the user or environment and send it to the CPU.

Examples: Keyboard, mouse, scanner, microphone.

Explanation

A temporary storage place for information in a computer is primarily called RAM (Random Access Memory), which holds data for active programs

But also cache memory (faster, closer to CPU) or a buffer,

Explanation

• High-quality CAD (Computer-Aided Design) systems require precise printing of drawings and graphics.
  • A Digital Plotter is used to print large-scale, accurate, and high-resolution CAD drawings.
  • Digital plotters produce line drawings, blueprints, and architectural plans with exact dimensions.

Last verified on 17-01-2026

Explanation

• Optical storage devices use lasers and light to read and write information.
• Common examples include CDs, DVDs, and Blu-ray discs.
• Optical storage is widely used for music, movies, software, and backup data.

Additional information:

• Optical storage is non-volatile, meaning data is retained without power.
• It is slower than hard drives (HDDs) and solid-state drives (SSDs) but is durable and portable.

Last verified on 17-01-2026

Explanation

A "standalone" computer by definition does not require a network connection to function, as it operates independently. 

A LAN Card (Local Area Network card) is networking hardware used to connect a computer to a network (like the internet or a local office network).

RAM (Random Access Memory) is a crucial component for a computer's basic operation

An operating system (OS) is essential system software that manages the computer's hardware and software resources 

Explanation

• When inserting content from one application into another, there are two main methods: embedding and linking.
• Embedding stores the content directly in the document.
• While linking keeps it connected to the source file.
• Both methods are part of OLE (Object Linking and Embedding) technology in Microsoft Office.

Last verified on 16-01-2026

Explanation

• Pascal’s calculator was called the Pascaline.
• John Mauchly co-invented the ENIAC (first electronic computer) much later.
• Harvard Aliken is unrelated to the first calculator.

Explanation

The World Wide Web was created by combining the internet with hypertext concepts.

It was invented in 1989 to improve information sharing at CERN.

Additional information:

Tim Berners Lee also created HTML, HTTP, and the first web browser.

Explanation

Blank DVDs that allow data to be erased and rewritten multiple times are called DVD+RW.

Standard DVDs can only be written once and cannot be reused.

Rewritable DVDs are useful for backups, software, and data transfer.

Additional information:

• DVD+RW can be rewritten up to 1000 times.
• Standard DVD (DVD-R or DVD+R) can only be written once.
• Rewritable DVDs are commonly used for temporary data storage and software testing.

Last verified on 16-01-2026