App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 37 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.True or false: a clear word like Save is poor button design. (a) True (b) False
2. 2.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 64 px tall
   Save button: 60 px tall
   Help button: 28 px tall (a) Send (b) Save (c) Help
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
7. 7.True or false: a clear word like Save is good button design. (a) False (b) True
8. 8.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) light grey on white
9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Start button: 52 px tall
    Cancel button: 72 px tall (a) Start (b) Help (c) Cancel
11. 11.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
12. 12.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
15. 15.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
16. 16.True or false: a big, easy tap area is poor button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Next button: 72 px tall
    Cancel button: 32 px tall
    Done button: 52 px tall (a) Next (b) Cancel (c) Done (d) Help
18. 18.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) yellow on white (d) dark blue on white
19. 19.True or false: a big, easy tap area is good button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Send button: 56 px tall
    Done button: 60 px tall
21. 21.Which colour pair is easy to read? (a) white on dark green (b) red on green (c) dark blue on black (d) yellow on white
22. 22.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) white on black
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Cancel button: 48 px tall
    Next button: 60 px tall
    Start button: 44 px tall
24. 24.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) dark blue on white (d) white on black
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Start button: 32 px tall
    Help button: 44 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Back button: 40 px tall
    Done button: 64 px tall (a) Back (b) Help (c) Done
27. 27.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on white (d) yellow on white
28. 28.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on black (d) dark blue on black
29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Save button: 64 px tall
    Back button: 52 px tall (a) Save (b) Done (c) Back
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
32. 32.True or false: icons with no meaning is good button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Help button: 64 px tall
    Done button: 36 px tall
    Start button: 40 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Save button: 60 px tall
    Next button: 60 px tall
    Cancel button: 48 px tall
37. 37.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Send button: 56 px tall
    Cancel button: 32 px tall

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students