All Free Computer Science and IT MCQs with Answers

291. SQL is a query language and has types_______________?

• A. Data definition language
• B. Data manipulation language
• C. Data control language
• D. All of the above

Explanation: SQL includes data definition commands such as CREATE, data manipulation commands such as SELECT and UPDATE, and data control commands such as GRANT. Therefore, all three listed categories are represented.

292. DBMS stands for____________?

• A. Database management system
• B. Database maintaince system
• C. Database maintaince and storage
• D. Database management Sound

Explanation: DBMS stands for Database Management System, software that creates, stores, organizes, and controls access to databases. The other expansions are not standard computing terms.

293. Which of the following contains permanent data and gets updated during the processing of transactions?

• A. Operating System File
• B. Transaction file
• C. Software File
• D. Master file

Explanation: A master file holds relatively permanent information, such as customer or account records, and is updated using transaction data. A transaction file temporarily records the individual changes or events.

294. Which organization has launched the quantum processor 'Willow'?

• A. Google
• B. Yahoo
• C. Amazon
• D. Microsoft

Explanation: Willow is Google's quantum processor, announced by Google Quantum AI in 2024. Yahoo, Amazon, and Microsoft have quantum-computing initiatives, but they did not launch the processor named Willow.

295. The______________is the amount of data that a storage device can move from the storage medium to the Computer per second?

• A. data migration rate
• B. data digitizing rate
• C. data transfer rate
• D. data access rate

Explanation: Data transfer rate measures how much data a storage device can move between the storage medium and the computer per second. Access rate instead concerns how quickly data can be located or reached.

296. Which is a volatile memory ?

• A. ROM
• B. RAM
• C. BIOS
• D. PROM

Explanation: RAM is volatile because its contents disappear when electrical power is removed. ROM, PROM, and the firmware stored in BIOS are non-volatile.

297. The term___________designates equipment that might be added to a computer system to enhance its functionality.

• A. digital device
• B. system add-on
• C. disk pack
• D. peripheral device

Explanation: A peripheral device is hardware added to a computer to provide or enhance functions such as input, output, storage, or communication. A system add-on is not the standard general term.

298. Latest MS Windows is__________?

• A. Windows 8
• B. Windows 10
• C. Windows 11
• D. Windows 7Word Processing Software

Explanation: Windows 11 is the latest major desktop version of Microsoft Windows. Windows 8, 10 and 7 are earlier releases.

299. 'Notification area' is available in which Desktop's function?

• A. Windows Button
• B. Taskbar
• C. Title bar
• D. None of These

Explanation: The notification area is the system-tray section of the taskbar, normally located near the clock. It displays status icons and notifications.

300. Windows+M is used for: ________?

• A. Minimize file/folder
• B. Maximize file/folder
• C. Zoom file/folder
• D. All of these

Explanation: Windows+M minimizes all open windows to show the desktop; it does not maximize or zoom files. The wording says file/folder, but option a is the closest intended choice.