Class 3 Computer Worksheet: Class Test

Computer lesson 18: Class 3 computer test · Set 912 · 40 questions

Remember (Find the topic, use the idea): Read the question and find its topic: hardware or software, units, memory, files, or editing text. Use that lesson’s idea — can you touch it, multiply to change units, RAM forgets, which file action, which shortcut. For unit sums, write the rule first (1 byte = 8 bits, 1 KB = 1024 bytes) and then multiply.

1. 1.📄 A file name ends in .pdf. What is it most likely? (a) a picture (b) a video (c) a sound (d) a document
2. 2.Which of these is a storage device? (a) hard disk (b) microphone (c) mouse (d) scanner
3. 3.🧰 Is a microphone a storage, input or output device? (a) a storage device (b) an input device (c) an output device
4. 4.💾 Which one keeps photos for years: RAM or storage? (a) storage (b) RAM
5. 5.True or false: to move a file means to see what is inside. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) a paint program (b) a mouse (c) a web browser (d) an operating system
7. 7.💾 Which is smaller: 1 GB or 1 KB? (a) 1 GB (b) 1 KB
8. 8.Which file ending is a sound? (a) .mkv (b) .pdf (c) .wav (d) .png
9. 9.Which of these is software? (a) a pen drive (b) a speaker (c) a paint program (d) a hard disk
10. 10.⌨️ In a word processor, what does Ctrl+X do? (a) cut (b) print (c) save (d) undo
11. 11.Which shortcut do we press to undo? (a) Ctrl+X (b) Ctrl+V (c) Ctrl+C (d) Ctrl+Z
12. 12.⌨️ In a word processor, what does Ctrl+C do? (a) paste (b) copy (c) print (d) undo
13. 13.Which of these is hardware? (a) a computer game (b) a calculator app (c) a paint program (d) a monitor
14. 14.Which shortcut do we press to copy? (a) Ctrl+Z (b) Ctrl+P (c) Ctrl+C (d) Ctrl+V
15. 15.Which of these is an input device? (a) microphone (b) hard disk (c) solid-state drive (d) memory card
16. 16.What does it mean to save a file? (a) make a brand-new one (b) store your work (c) make an exact twin (d) see what is inside
17. 17.🧩 Is a keyboard hardware or software? (a) hardware (b) software
18. 18.True or false: a hard disk is software. (a) True (b) False
19. 19.⌨️ In a word processor, what does Ctrl+Z do? (a) redo (b) cut (c) print (d) undo
20. 20.💾 Which is bigger: 1 MB or 1 GB? (a) 1 MB (b) 1 GB
21. 21.True or false: a typing tutor is hardware. (a) True (b) False
22. 22.💾 How many MB are there in 1 GB?
23. 23.💾 How many KB are there in 4 MB?
24. 24.🔢 A bit can be only 0 or ___. (a) 2 (b) 1 (c) 5 (d) 9
25. 25.🧩 Is an operating system hardware or software? (a) software (b) hardware
26. 26.🔍 Which is the odd one out? (a) printer (b) memory card (c) projector (d) speaker
27. 27.Which of these is hardware? (a) a hard disk (b) an operating system (c) a music player app (d) a web browser
28. 28.💾 How many bytes are there in 2 KB?
29. 29.🔍 Which is the odd one out? (a) a speaker (b) a keyboard (c) a paint program (d) a printer
30. 30.🔌 The power goes off suddenly. Which loses the unsaved work? (a) the hard disk (b) the pen drive (c) RAM (d) the memory card
31. 31.Which shortcut do we press to save? (a) Ctrl+C (b) Ctrl+Z (c) Ctrl+S (d) Ctrl+V
32. 32.What does it mean to copy a file? (a) change its name (b) make an exact twin (c) see what is inside (d) get rid of it
33. 33.💡 What is the smallest unit of computer memory? (a) GB (b) KB (c) bit (d) byte
34. 34.💾 How many bytes are there in 1 KB?
35. 35.True or false: a scanner is an output device. (a) False (b) True
36. 36.Which of these is true of storage (like a hard disk)? (a) is temporary memory (b) keeps data when off (c) loses data when off (d) is the working memory
37. 37.🔍 Which is the odd one out? (a) speaker (b) printer (c) monitor (d) hard disk
38. 38.💾 Which is smaller: 1 MB or 1 TB? (a) 1 TB (b) 1 MB
39. 39.↩️ You pressed Undo by mistake. Which command puts the change back? (a) Cut (b) Copy (c) Redo (d) Delete
40. 40.🧾 Software is a set of ___ for the computer. (a) buttons (b) wires (c) instructions (d) screws

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