App Dev Worksheet: Button Size and Contrast

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

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