Computer & Information Technology

422

Q270. Which manufacturer introduced the PS/2 keyboard and mouse connector?

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1. Microsoft
2. Intel
3. IBM
4. Apple
5. Dell

Answer: C. IBM

Explanation: IBM introduced PS/2 ports with its Personal System/2 computer range in 1987. The six-pin mini-DIN connection was used for keyboards and mice before USB became the more common peripheral standard.

Q269. What is the main function of the POP3 email protocol?

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1. Sending outgoing mail
2. Retrieving messages from an email server
3. Synchronizing mailbox folders across devices
4. Encrypting messages
5. Handling DNS queries

Answer: B. Retrieving messages from an email server

Explanation: Post Office Protocol version 3 downloads email from a server into a client. SMTP handles sending email, while IMAP is designed for synchronization of mail and folders across multiple devices.

Q268. Which common colour-coded audio socket connects speakers or headphones?

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1. Pink
2. Blue
3. Lime green
4. Black
5. Orange

Answer: C. Lime green

Explanation: On traditional desktop PC sound cards, the lime-green jack is assigned to audio line output. Pink commonly denotes microphone input and blue indicates line input, although newer devices may use combined audio sockets.

Q267. Which Microsoft application is intended for letters, résumés and other formatted text?

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1. Excel
2. PowerPoint
3. Word
4. Access
5. Outlook

Answer: C. Word

Explanation: Microsoft Word is a word processor with tools for drafting, editing and formatting documents. Excel focuses on spreadsheets, PowerPoint on presentations, Access on databases and Outlook on messages and calendar management.

Q266. Where is the BIOS firmware ordinarily stored in a personal computer?

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1. Hard disk
2. Volatile RAM
3. Nonvolatile motherboard ROM or flash
4. CPU cache
5. Temporary user folder

Answer: C. Nonvolatile motherboard ROM or flash

Explanation: Basic Input Output System firmware is stored in nonvolatile memory mounted on the motherboard. Modern systems commonly use rewritable flash for firmware, allowing boot operations before an operating system starts.

Q265. What hardware feature present in HDDs is generally missing from SSDs?

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1. Nonvolatile storage
2. Mechanical moving parts
3. Ability to install an OS
4. Capacity to hold files
5. Storage interface support

Answer: B. Mechanical moving parts

Explanation: Hard drives rely on spinning magnetic platters and movable read-write heads. SSDs instead use electronic flash storage and lack those moving mechanisms, typically improving access speed and resistance to vibration.

Q264. What online-meeting feature can highlight one presenter’s video for all participants?

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1. Raise hand
2. Local pin
3. Share screen
4. Spotlight video
5. Gallery view

Answer: D. Spotlight video

Explanation: Video spotlighting elevates one participant’s camera feed within a meeting, frequently under host control. Pinning a video generally affects only the viewing preference of the person who pinned it.

Q263. Which manufacturing process underlies ordinary 3D printing?

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1. Subtractive manufacturing
2. Casting
3. Forging
4. Additive manufacturing
5. Injection moulding

Answer: D. Additive manufacturing

Explanation: Three-dimensional printing creates objects from a computer model by adding material in successive layers. It is therefore additive manufacturing, unlike milling or machining processes that form shapes by removing material.

Q262. Which of these is a programming language rather than an operating system?

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1. Windows
2. Linux
3. macOS
4. Python
5. Android

Answer: D. Python

Explanation: Python is a high-level programming language used for scripting and software development. Windows, Linux, macOS and Android instead manage computer or device resources as operating systems and support application execution.

Q261. What is the cryptographic process of turning readable plaintext into ciphertext?

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1. Decryption
2. Encryption
3. Compression
4. Renaming
5. Defragmentation

Answer: B. Encryption

Explanation: Encryption transforms readable information into an unintelligible representation using a key and an algorithm. Authorized users can reverse this process by decrypting it, unlike compression, which is primarily used to reduce file size.