App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 838 · 40 questions

Developer's tip (Plan, design, build, check): Find the topic: what apps are, designing apps, or logic and building. Read every screen, list or code line carefully, top to bottom. For code, write each value down step by step and check it again.

1. 1.🧪 One test case fails. Which one?
   🚚 Rule: delivery is free (0) when the order is 400 or more; otherwise it costs 40.
   function delivery(total) {
     if (total > 400) {
       return 0;
     }
     return 40;
   }
   Test 1: delivery(400) → expected 0
   Test 2: delivery(450) → expected 0
   Test 3: delivery(350) → expected 40 (a) Test 3 (b) Test 1 (c) Test 2
2. 2.🔀 What is a user flow? (a) a charging cable (b) a colour theme (c) a type of font (d) the path through screens
3. 3.🔍 Which is the odd one out? (a) typing your age (b) a beep sound (c) taking a photo (d) tapping a button
4. 4.🧪 A test fails when ___. (a) the app is new (b) the font is big (c) both are the same (d) actual is not expected
5. 5.🧩 Which of these is a button on this screen?
   [title] Sign Up
   [text box] Subject
   [text box] Notes
   [button] Save
   [text box] Email
   [button] Start (a) Notes (b) Subject (c) Email (d) Save
6. 6.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) savings stickers (b) pie-chart colours (c) add money spent (d) export to a file
7. 7.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on dark green (d) dark blue on white
8. 8.🗒️ Version 1 of a bus tracker must be ready in 12 days. How many days are left for extras after the must-haves?
   see where the bus is: 3 days
   show arrival time: 2 days
   pick your bus stop: 2 days
9. 9.🧩 Which part lets the user give the app information? (a) a logo (b) an input (c) a title (d) an icon
10. 10.True or false: a flashcard trainer is a learning app. (a) False (b) True
11. 11.🔐 Is this permission request fair or too much: map app → location? (a) fair (b) too much
12. 12.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Label: 22 px
    Title: 10 px
    Body text: 27 px
    Hint: 27 px
    Menu: 17 px (a) Title (b) Body text (c) Label (d) Hint
13. 13.🐞 After fixing a bug you should ___. (a) delete the test (b) release at once (c) test it again (d) never test
14. 14.True or false: a guitar tuner needs the microphone. (a) True (b) False
15. 15.♿ Does this help everyone, or make the app harder to use: sudden loud sounds? (a) helps everyone (b) makes it harder
16. 16.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] New Note
    [text box] Age
    [slider] Volume
    [switch] Sound
    [button] Help
    [button] Back
    [button] Cancel
    [text box] Notes
17. 17.🔍 Which is the odd one out? (a) speaking a command (b) adding up a bill (c) checking a password (d) sorting the scores
18. 18.🧰 In function tip(bill), what is bill? (a) an event (b) a loop (c) a parameter (d) a screen
19. 19.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 48; // start at 48
    line 2: score = score + 1; // take away 1
    line 3: score = score - 4; // take away 4
    line 4: show(score); // show it (a) line 2 (b) line 1 (c) line 3
20. 20.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Cart → Menu → Address → Results → Offers → Pay
    Design B: Home → Cart → Results (a) Design B (b) Design A
21. 21.Which of these is about UX (the experience)? (a) the theme colours (b) the font size (c) how easy sign-up is (d) the button colours
22. 22.🔢 In a photo-post flow, which comes first: “post the photo” or “open the camera screen”? (a) post the photo (b) open the camera screen
23. 23.👥 A cricket club app has 195 players, 55 coaches and 135 fans as users. Which user group is the biggest? (a) coaches (b) fans (c) players
24. 24.👆 The user taps the button 1 times. What does the label show now?
    let on = false;
    button.onTap = function () {
      on = !on;
      if (on) {
        label.text = "ON";
      } else {
        label.text = "OFF";
      }
    }; (a) OFF (b) ON
25. 25.🔢 When you make an app, which comes first: “get an idea” or “test the app”? (a) get an idea (b) test the app
26. 26.👆 What kind of event is this: a finger hits Like? (a) a text event (b) a timer event (c) a load event (d) a tap event
27. 27.👆 What kind of event is this: the app starts up? (a) a load event (b) a timer event (c) a text event (d) a tap event
28. 28.🧩 Which of these is a button on this screen?
    [title] Settings
    [text box] Notes
    [text box] City
    [button] Start
    [text box] Name
    [switch] Sound (a) Name (b) Notes (c) City (d) Start
29. 29.📊 Survey: which problem bugs you most? How many more votes did “forgetting birthdays” get than “missing the bus”?
    missing the bus: 14 votes
    wasting pocket money: 17 votes
    forgetting birthdays: 21 votes
30. 30.🔍 Which is the odd one out? (a) a buzz (vibration) (b) taking a photo (c) speaking a command (d) typing your age
31. 31.True or false: a date picker is data. (a) False (b) True
32. 32.Which of these is a user need? (a) a search bar (b) “What should I cook?” (c) a reminder alarm (d) a dark mode switch
33. 33.💡 Which app idea solves this problem: a team shares one snack bill? (a) a lost-and-found board (b) a bill splitter (c) a study-room finder (d) a homework planner
34. 34.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Pens → Results → Search → Offers
    Design B: Home → Address → Search
35. 35.🧰 What does return do in a function? (a) repeats the code (b) sends back a value (c) closes the screen (d) deletes the app
36. 36.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    losing water bottles: 4 votes
    missing the bus: 13 votes
    wasting pocket money: 9 votes (a) missing the bus (b) losing water bottles (c) wasting pocket money
37. 37.🗒️ Version 1 of a bus tracker must be ready in 11 days. How many days are left for extras after the must-haves?
    see where the bus is: 1 days
    show arrival time: 4 days
    pick your bus stop: 2 days
38. 38.🧰 How do you run (call) a function called greet? (a) #greet (b) greet[] (c) run greet (d) greet()
39. 39.Which of these requests is fair? (a) torch → contacts (b) calculator → location (c) voice notes → microphone (d) timer → your photos
40. 40.🔀 What number does this shop app show?
    let total = 490;
    if (total > 500) {
      total = total - 50;
    }
    show(total);

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