Explanation

• Shift + Arrow Keys → Select text or cells

Additional information:

• Ctrl + C → Copy
• Ctrl + X → Cut
• Ctrl + V → Paste
• Ctrl + A → Select All

Last verified on 23-07-2026

Explanation

• The correct formula to add values in Excel is =SUM(A1:A2).
• The SUM function adds numbers from the selected cell range.
• Excel formulas always begin with the =` (equal) sign.
• A1:A2 means all cells from A1 to A2.

Last verified on 14-07-2026

Explanation

• Full Form: Structured Query Language
• SQL is the standard language used to store, retrieve, update, and manage data in relational databases.

Additional information:

• Designed by: Donald D. Chamberlin & Raymond F. Boyce
• First appeared: 1974
• Latest ISO Standard: SQL:2016 (December 2016)
• Main SQL Commands: SELECT, INSERT, UPDATE, DELETE, CREATE

Last verified on 22-07-2026

Explanation

• A slide is the basic unit of a Microsoft PowerPoint presentation.
• Each slide can contain text, images, charts, tables, audio, video, and animations.
• A presentation consists of one or more slides arranged in sequence.

Additional information:

• The default file extension of a PowerPoint presentation is .pptx (since Office 2007).
• PowerPoint is widely used for education, business, meetings, and seminars.

Last verified on 22-07-2026

Explanation

• RAM should be upgraded first if a computer lags while using different programs.
• RAM (Random Access Memory) stores data for programs that are currently running.
• Increasing RAM improves multitasking and overall system performance.

Additional information:

• Common RAM sizes: 4 GB, 8 GB, 16 GB, 32 GB, 64 GB
• Minimum for basic use: 4 GB
• Recommended for everyday multitasking: 8 GB
• Recommended for gaming/content creation: 16 GB
• High-end professional workloads: 32 GB or more

Last verified on 22-07-2026

Explanation

• Java is a programming language commonly used for mobile app development, especially Android applications.
• It is an object-oriented, platform-independent programming language.
• It is developed by Sun Microsystems in 1995 (now owned by Oracle).

Additional information:

• HTML: Creates the structure of web pages.
• SQL: Used to manage and query databases.
• Kotlin: Officially preferred language for Android development by Google (since 2019).

Last verified on 22-07-2026

Explanation

• A bit (binary digit) is the smallest unit of data in a computer.
• It can have a value of 0 or 1, representing two possible states.

Additional information:

• 1 Byte = 8 bits
• 1 Kilobyte (KB) = 1024 Bytes
• 1 Megabyte (MB) = 1024 KB
• 1 Gigabyte (GB) = 1024 MB
• 1 Terabyte (TB) = 1024 GB

Last verified on 12-03-2026

Explanation

• Machine Language / Assembly is NOT a high-level programming language.
• High-level languages are closer to human language and easier to read.
• Machine and assembly languages are closer to hardware.
• They are used for low-level system control.
• They require more technical understanding than high-level languages.

Last verified on 07-06-2026

Explanation

• Pressing the Alt key alone does not edit the contents of a cell.
• The Alt key is mainly used to access the Ribbon shortcuts and menu commands.
• In MS Excel, you can edit a cell by double-clicking the cell, pressing F2, or clicking in the Formula Bar.

Last verified on 21-07-2026

Explanation

• Windows logo + L: Locks the Windows PC screen.
• Ctrl + Alt + L: Locks only the keyboard in some third-party apps.
• Ctrl + Tab: Switches browser tabs.
• Ctrl + Alt: Modifiers; they do nothing alone.

Last verified on 21-07-2026