Q1. Which of the following is an example of a secondary storage device?
A) RAM
B) CPU Register
C) Hard Disk Drive
D) Cache Memory
✅ Answer: C) Hard Disk Drive
💡 Explanation: HDD is a secondary (auxiliary) storage device. RAM, registers, and cache are primary memory.
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Q2. An optical mouse uses which technology to detect movement?
A) Laser beam
B) LED light and a CMOS sensor
C) Mechanical ball
D) Infrared sensor
✅ Answer: B) LED light and a CMOS sensor
💡 Explanation: Optical mice use LED light to illuminate the surface; a CMOS sensor captures images to detect movement direction.
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Q3. DPI in the context of a printer/scanner stands for:
A) Data Per Inch
B) Dots Per Inch
C) Display Per Input
D) Digital Print Index
✅ Answer: B) Dots Per Inch
💡 Explanation: DPI (Dots Per Inch) measures the resolution/quality of a printer or scanner — higher DPI means sharper output.
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Q4. A Braille printer is an example of:
A) Impact printer for visually impaired users
B) Laser printer
C) Thermal printer
D) Inkjet printer
✅ Answer: A) Impact printer for visually impaired users
💡 Explanation: Braille printers emboss Braille characters onto paper, enabling visually impaired people to read printed output.
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Q5. Which port is used to connect a monitor using a digital signal?
A) VGA
B) PS/2
C) HDMI
D) Serial Port
✅ Answer: C) HDMI
💡 Explanation: HDMI (High-Definition Multimedia Interface) transmits uncompressed digital audio and video signals to a monitor/TV.
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Q6. The storage capacity of a standard single-layer Blu-ray disc is:
A) 4.7 GB
B) 8.5 GB
C) 25 GB
D) 50 GB
✅ Answer: C) 25 GB
💡 Explanation: A single-layer Blu-ray disc holds 25 GB. Dual-layer holds 50 GB. Compare: DVD holds 4.7 GB (single layer).
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Q7. Which type of scanner uses a flat glass surface to scan documents?
A) Drum Scanner
B) Handheld Scanner
C) Flatbed Scanner
D) Sheetfed Scanner
✅ Answer: C) Flatbed Scanner
💡 Explanation: Flatbed scanners have a flat glass plate where documents or photos are placed face-down for scanning.
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Q8. OCR technology stands for:
A) Output Character Recognition
B) Optical Character Recognition
C) Online Content Reader
D) Optical Computation Resolution
✅ Answer: B) Optical Character Recognition
💡 Explanation: OCR converts images of printed or handwritten text into machine-readable/editable digital text.
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Q9. A UPS (Uninterruptible Power Supply) is used to:
A) Increase computer performance
B) Provide backup power during power outages to prevent data loss
C) Reduce electricity consumption
D) Cool the computer components
✅ Answer: B) Provide backup power during power outages to prevent data loss
💡 Explanation: UPS provides battery backup power when electricity fails, giving time to save work and shut down properly.
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Q10. USB 3.0 is also known as:
A) USB SuperSpeed
B) USB Hi-Speed
C) USB Full Speed
D) USB TurboSpeed
✅ Answer: A) USB SuperSpeed
💡 Explanation: USB 3.0 is officially branded as USB SuperSpeed, with data transfer rates up to 5 Gbps.
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Q11. Which input device is used to read barcodes in supermarkets?
A) MICR
B) OCR
C) Barcode Reader/Scanner
D) OMR
✅ Answer: C) Barcode Reader/Scanner
💡 Explanation: Barcode readers (laser scanners) read UPC/EAN barcodes at retail point-of-sale systems.
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Q12. MICR technology is primarily used in:
A) Supermarkets for barcode scanning
B) Banks for processing cheques
C) Hospitals for patient ID
D) Airports for boarding passes
✅ Answer: B) Banks for processing cheques
💡 Explanation: MICR (Magnetic Ink Character Recognition) reads the magnetic ink characters on bank cheques for automated processing.
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Q13. Which type of memory card is most commonly used in digital cameras?
A) CompactFlash
B) SD (Secure Digital) card
C) USB drive
D) SIM card
✅ Answer: B) SD (Secure Digital) card
💡 Explanation: SD cards (SDHC, SDXC) are the most widely used removable memory in digital cameras and smartphones.
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Q14. A touchscreen that can detect multiple simultaneous touch points uses:
A) Resistive touch technology
B) Multi-touch capacitive technology
C) Infrared touch only
D) Acoustic pulse recognition
✅ Answer: B) Multi-touch capacitive technology
💡 Explanation: Capacitive multi-touch screens detect multiple simultaneous touch points through electrical charge changes.
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Q15. NFC stands for:
A) Near Field Communication
B) Network File Communication
C) Node Frequency Control
D) New Format Connectivity
✅ Answer: A) Near Field Communication
💡 Explanation: NFC (Near Field Communication) enables short-range wireless data exchange (within ~4 cm) for payments, pairing.
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Q16. Which of the following is NOT an impact printer?
A) Dot Matrix Printer
B) Daisy Wheel Printer
C) Line Printer
D) Laser Printer
✅ Answer: D) Laser Printer
💡 Explanation: Laser printers are non-impact printers using electrostatic technology. Impact printers physically strike ribbon on paper.
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Q17. The read/write speed of an NVMe SSD compared to a SATA SSD is approximately:
A) Same speed
B) 2× faster
C) 5–6× faster
D) 10× slower
✅ Answer: C) 5–6× faster
💡 Explanation: NVMe SSDs use the PCIe bus (3500+ MB/s) while SATA SSDs are limited to ~550 MB/s — NVMe is ~5–6× faster.
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Q18. Which port transmits both audio and video in a single cable and is found on Apple devices?
A) HDMI
B) DisplayPort
C) Thunderbolt
D) DVI
✅ Answer: C) Thunderbolt
💡 Explanation: Thunderbolt (by Intel/Apple) supports video, audio, data, and power delivery over a single port at very high speeds.
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Q19. A Joystick is primarily used for:
A) Data input in accounting software
B) Gaming and flight simulation control
C) Text input
D) Image scanning
✅ Answer: B) Gaming and flight simulation control
💡 Explanation: Joysticks are input devices used for controlling movement in video games, flight simulators, and industrial applications.
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Q20. RAID stands for:
A) Redundant Array of Independent Disks
B) Random Access of Indexed Data
C) Rapid Array of Integrated Drives
D) Redundant Array of Indexed Databases
✅ Answer: A) Redundant Array of Independent Disks
💡 Explanation: RAID combines multiple physical disks for redundancy (RAID 1), performance (RAID 0), or both (RAID 5, 6, 10).
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