Free Hardware and Software MCQs with Answers

31. Which of the following device uses the parallel transmission?

• A. Mouse
• B. Keyboard
• C. Printer
• D. Light Pen

Explanation: Traditional printers commonly used parallel transmission, sending several bits simultaneously over separate lines. Mouse, keyboard and light pen connections are conventionally treated as serial transmission in this type of question.

32. Who was the inventor of mouse?

• A. Douglas Engelbart
• B. Ada Lovelace
• C. Charles Babbage
• D. None of these

Explanation: Douglas Engelbart invented the first computer mouse prototype in the 1960s. Ada Lovelace and Charles Babbage are associated with early programming and computing concepts, not the mouse.

33. When was the first IBM microcomputer called IBM with 16-bit microprocessor introduced?

• A. 1979
• B. 1981
• C. 1982
• D. 1984Spreadsheet Software

Explanation: IBM introduced the IBM PC in 1981, using Intel's 16-bit 8088 microprocessor. The 1979, 1982, and 1984 dates do not match the original IBM PC introduction.

34. Which is the place that is used to connect various external devices to the computer?

• A. Circuit
• B. Whole
• C. Port
• D. None of these

Explanation: A port is a physical connection point used to attach peripherals such as keyboards, printers, displays, and external drives. A circuit is an electronic pathway, not the standard connector for external devices.

35. Which one is a Program of Operating System that carries your Data?

• A. BIOS
• B. ROM
• C. Loader
• D. Processor

Explanation: A loader is system software that loads the operating system or programs into main memory so they can run. BIOS and ROM are firmware or memory components, while the processor is hardware.

36. Loading of Operating System in Personal Computer is called?

• A. Processing
• B. Installation
• C. Booting
• D. None of these

Explanation: Booting is the process of loading the operating system into memory when a computer starts or restarts. Installation means placing the operating system on storage, which is a different process.

37. Parallel Port is called?

• A. Male Connector
• B. Female Connector
• C. Joint Connector
• D. None of these

Explanation: The traditional parallel port on a computer is a female connector, while the cable plug is normally male. This distinction refers to the physical shape of the connector, not its data direction.

38. Which mechanism is used by the computer virus 'worm' to duplicate itself?

• A. Swap
• B. Spawn
• C. Increment
• D. Swarm

Explanation: A worm can replicate by spawning new copies of itself, often without attaching to another file. Swap concerns memory or storage exchange, not virus replication.

39. in RAM memory, DDR stands for ?

• A. Double sided RIMM
• B. Double data rate
• C. Digital data rate
• D. Dynamic data rate

Explanation: DDR means Double Data Rate because the memory transfers data on both clock edges, increasing the transfer rate without doubling the clock frequency. The other expansions are not standard memory terminology.

40. How many pins in DDR3 Memory?

• A. 240
• B. 128
• C. 195
• D. 228Fun & Trivia

Explanation: A standard desktop DDR3 DIMM has 240 pins. Laptop DDR3 SO-DIMMs use a different package and pin count, but that distinction is not specified here.