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Explanation

• GUI stands for Graphical User Interface.
• It uses icons, windows, and menus for interaction.
• It is easier to use than command-based interfaces.
• MS-DOS and Apple DOS are command-line interfaces.

Last verified on 11-04-2026

Explanation

• Multi-tasking provides process and memory management services that allow two or more tasks, jobs, or programs to run simultaneously.
• The operating system manages CPU time, memory, and other resources among the running tasks.

Additional information:

• Multiprocessing refers to using two or more processors/CPU cores to execute processes.
• Multithreading allows multiple threads within a process to execute concurrently.
• Multicomputing involves using multiple separate computers or computing systems.

Last verified on 10-08-2026

Explanation

• The Recycle Bin temporarily stores deleted files and folders in Windows.
• Files in the Recycle Bin can usually be restored to their original location.
• Choosing Empty Recycle Bin permanently removes the stored items.

Last verified on 10-08-2026

Explanation

• Selecting "No Outline" removes or hides the border of a shape.
• This option is available in applications like MS Word or PowerPoint.
• It leaves the shape without a visible border.

Last verified on 10-08-2026

Explanation

• A vacuum tube is also known as an electronic valve because it can control the flow of electrons.
• It especially allowing current to flow primarily in one direction in diode-type vacuum tubes.
• The term “valve” comes from its ability to control or regulate electron flow.
• A diode vacuum tube has two electrodes and permits current mainly in one direction.
• Vacuum tubes were widely used in early computers, radios, televisions, and amplifiers.

Last verified on 10-08-2026

Explanation

• The function of a web browser is to view and interact with web content.
• A web browser is software used to access and display websites on the Internet.
• It retrieves web pages from web servers and displays text, images, videos, and other content.
• Examples include Google Chrome, Mozilla Firefox, Microsoft Edge, and Safari.
• Browsers use web technologies such as HTML, CSS, and JavaScript to display interactive web pages.

Last verified on 10-08-2026

Explanation

• To adjust a column width to fit its contents in Excel, you can:
• Double-click the boundary to the right of the column heading.
• This action automatically resizes the column width to match the longest entry in that column.
• This ensuring that all data is visible without manually adjusting the width.

Last verified on 10-08-2026

Explanation

• =SUM(A1:A10) is the formula used to calculate the sum of cells A1 through A10.
• The SUM function adds values in a specified range of cells.
• It is one of the most commonly used spreadsheet functions.
• The colon (:) indicates a continuous range of cells.
• It works in spreadsheet software like Excel and Google Sheets.

Last verified on 08-06-2026

Explanation

• Charles Babbage's computer was called the Analytical Engine.
• He was an English mathematician, inventor, and mechanical engineer.
• He designed the Analytical Engine, a general-purpose mechanical computer concept.
• Babbage worked on the Analytical Engine during the 19th century until his death in 1871.
• The Analytical Engine was designed to perform calculations and follow programmed instructions.
• Charles Babbage is widely known as the “Father of the Computer.”

Last verified on 10-08-2026

Explanation

• The thin black cross-shaped pointer in MS Excel is used to complete lists and fill patterns.
• It is known as the Fill Handle.
• The Fill Handle appears at the bottom-right corner of the selected cell.
• Dragging it can automatically fill adjacent cells with data, formulas, numbers, dates, or patterns.
• It can extend sequences such as 1, 2, 3, 4... or Monday, Tuesday, Wednesday...
• It saves time by automatically completing repetitive data.

Last verified on 10-08-2026