Class 9 · कंप्यूटर · 255+ Q&A
IT basics, hardware, software, internet safety and MS Office for Class 9. Showing 5 of 5 on page 1 / 1.
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Hardware is the physical parts of a computer you can touch. Examples: CPU, monitor, keyboard, mouse, printer, hard disk. It cannot work usefully without software. Handle lab hardware with dry hands and care for ports.
ALU does arithmetic and logic. The control unit directs the flow of instructions. Registers hold data the CPU is using. Together they fetch, decode and execute. Clock pulses keep the steps in time.
A port is a connector on the cabinet or laptop. USB for keyboard/pendrive, HDMI or VGA for display, 3.5 mm for headset, Ethernet RJ-45 for LAN. Do not force a plug into the wrong hole.
It gives a few minutes of power so work can be saved and the PC shut down safely when mains fail. It also smooths small fluctuations. It is not a generator for hours. Save with Ctrl+S even when UPS is present.
Input: type marks in Excel. Process: SUM and average. Output: chart on monitor or printed rank list. Storage: save the .xlsx on disk. The CPU and RAM handle process; I/O devices handle in and out.
Class 9 Computer में कितने प्रश्न हैं? 255 महत्वपूर्ण प्रश्न: 174 MCQ, 50 लघु, 31 दीर्घ।
उत्तर कहाँ हैं? हर प्रश्न के नीचे View the correct answer दबाएँ। पहले स्वयं लिखें, फिर मिलाएँ।
पेज क्यों बँटे हैं? एक स्क्रीन पर 20 प्रश्न। बाकी Page 2, 3 पर — स्क्रॉल छोटा रहता है।
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