Computer & Information Technology

419

Q240. Which list contains only File Explorer display modes used in Windows?

[IBPS RRB PO Mains 2025]

1. Icons, Tiles, List, Details
2. Preview, Table, Grid, Zoom
3. Outline, Summary, Report, Icon
4. Sort, Filter, Group, Arrange
5. Folder, Link, Tree, Network

Answer: A. Icons, Tiles, List, Details

Explanation: Windows File Explorer can present files through icon sizes, Tiles, List and Details modes. The other answer groups combine actions or unrelated terms rather than a valid collection of layout choices.

Q239. Which technology can combine disks for redundancy and performance?

[IBPS RRB PO Mains 2025]

1. Ordinary cloud account
2. RAID
3. Virtual memory
4. CPU cache
5. One SSD

Answer: B. RAID

Explanation: RAID combines physical storage devices through techniques such as mirroring and striping. Certain levels improve fault tolerance, others performance, and some both, although not all RAID levels protect against drive failure.

Q238. What HTTP status code reports a permanent redirection to a new web address?

[RRB NTPC, 13 October 2025, Shift 2]

1. 500
2. 302
3. 404
4. 301

Answer: D. 301

Explanation: Status 301 means Moved Permanently and tells browsers and search engines that the resource has a lasting new location. A 302 redirection is temporary, 404 means Not Found and 500 denotes an internal server error. The distinctions matter when handling websites.

Q237. What normally happens when a standard remove-directory command is applied to a directory containing files, without recursive deletion?

[RRB NTPC, 6 June 2025, Shift 2]

1. Everything is removed automatically
2. Files are left orphaned
3. The command always requests item-by-item confirmation
4. An error says the directory is not empty

Answer: D. An error says the directory is not empty

Explanation: Basic directory-removal commands such as rmdir generally remove only empty directories. They refuse a populated directory unless an appropriate recursive deletion mechanism is used. This safeguard prevents unintentionally destroying nested files and subdirectories. Exact switches and prompts vary by operating system.

Q236. What is the principal function of a laptop operating system?

[RRB NTPC, 5 June 2025, Shift 2]

1. Typing documents
2. Running web browsers only
3. Managing hardware and software resources
4. Editing videos

Answer: C. Managing hardware and software resources

Explanation: The operating system allocates processor time and memory, manages devices, controls files and provides services to applications. Word processors, browsers and video editors are application programs that run on top of it. Windows, Linux and macOS are familiar operating-system examples.

Q235. Which statement about unshielded twisted-pair cabling is false?

[RRB JE CBT-2, 22 April 2025, Shift 2]

1. It resists electromagnetic interference better than shielded twisted pair
2. It is commonly used in LANs
3. It is relatively light and flexible
4. It is economical for short links

Answer: A. It resists electromagnetic interference better than shielded twisted pair

Explanation: Unshielded twisted pair relies chiefly on twisting its conductors to cancel interference. Shielded twisted pair adds protective metal foil or braid and generally offers greater EMI resistance. UTP is widely deployed in Ethernet because it is inexpensive, flexible and straightforward to install.

Q234. Find the two’s complement of the six-bit binary number 101110.

[RRB JE CBT-2 (ECE), 22 April 2025, Shift 2]

1. 010011
2. 010010
3. 110001
4. 010001

Answer: B. 010010

Explanation: To obtain the two’s complement of a fixed-width binary number, reverse every bit and add one. Inverting 101110 gives 010001; adding one produces 010010. Two’s-complement representation is widely used for signed integer arithmetic inside processors and digital circuits.

Q233. Why is a network firewall primarily deployed?

[RRB JE CBT-2 (Civil), 22 April 2025, Shift 1]

1. To increase internet speed
2. To restrict unauthorised network access
3. To remove every computer virus
4. To store passwords

Answer: B. To restrict unauthorised network access

Explanation: A firewall filters inbound or outbound connections according to configured security rules. It may operate on a host or at the network boundary. Antivirus scanners and password managers perform different jobs; a firewall cannot guarantee total protection from malware or attacks.

Q232. Which RAM technology is comparatively fast and does not need periodic refresh?

[RRB JE CBT-2 (Civil), 22 April 2025, Shift 1]

1. SRAM
2. DRAM
3. Flash memory
4. ROM

Answer: A. SRAM

Explanation: Static RAM retains each stored bit in a transistor-based latch while power is available, so refresh cycles are unnecessary. Dynamic RAM uses capacitors whose charge leaks away and therefore requires refresh. SRAM is fast but expensive, making it suitable for processor caches.

Q231. Which listed device is not a constituent of a CPU?

[RRB JE CBT-2 (Civil), 22 April 2025, Shift 2]

1. Arithmetic logic unit
2. Control unit
3. Cache memory
4. Hard disk

Answer: D. Hard disk

Explanation: The CPU carries out instructions with help from control circuitry, arithmetic and logic hardware, registers and cache. A hard disk is separate nonvolatile secondary storage used for programs and files. Storage can supply instructions to memory, but it is not part of the processor.