App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 245 · 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.🐞 Each comment says what its line SHOULD do. Which line has the bug?
   line 1: let lives = 45; // start at 45
   line 2: lives = lives - 5; // take away 5
   line 3: lives = lives * 3; // double it
   line 4: show(lives); // show it (a) line 1 (b) line 2 (c) line 3
2. 2.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
   line 1: let score = 49; // start at 49
   line 2: score = score * 2; // double it
   line 3: score = score + 3; // take away 3
   line 4: show(score); // show it
3. 3.♿ Does this help everyone, or make the app harder to use: labels on every icon? (a) helps everyone (b) makes it harder
4. 4.🔍 Which is the odd one out? (a) share the download link (b) write the store text (c) put it on an app store (d) spot a problem to solve
5. 5.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) share tasks to friends (b) pick a theme colour (c) add a homework task (d) earn stickers
6. 6.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) confetti effects (b) show a question (c) an avatar shop (d) background music
7. 7.📊 Survey: which problem bugs you most? Which problem should your app solve first?
   forgetting birthdays: 23 votes
   missing the bus: 16 votes
   no quiet study place: 7 votes (a) missing the bus (b) forgetting birthdays (c) no quiet study place
8. 8.True or false: you connect the data at the build stage. (a) False (b) True
9. 9.🚀 A change from version 1.4.2 to 1.4.3 usually means ___. (a) a new app (b) a big redesign (c) a new feature (d) a bug fix
10. 10.🎯 Why learn about users before you build? (a) to pick a logo (b) to slow it down (c) to make it longer (d) to build what they need
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Back button: 56 px tall
    Start button: 40 px tall
    Help button: 60 px tall
12. 12.Which of these is a user need? (a) a share button (b) “What should I cook?” (c) a search bar (d) a reminder alarm
13. 13.👆 The user types Riya in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Well done, " + nameBox.text + "!";
    }; (a) Well done, Riya! (b) Well done, nameBox.text! (c) Riya (d) Well done!
14. 14.🔍 Which is the odd one out? (a) the theme colours (b) the icon shapes (c) the font size (d) how users feel after
15. 15.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) output (c) processing
16. 16.True or false: a big, easy tap area is poor button design. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) a torch (b) a flashcard trainer (c) a calculator (d) an alarm clock
18. 18.📱 Which one is installed on a phone: an app or a website? (a) a website (b) an app
19. 19.True or false: a big-text reader is the best fit for a grandparent with weak eyesight. (a) True (b) False
20. 20.True or false: a homework planner is the best fit for a pupil juggling five projects. (a) True (b) False
21. 21.✏️ Is this true of a wireframe or of a final design: shows the real fonts? (a) a wireframe (b) a final design
22. 22.🔀 What number does this shop app show?
    let total = 340;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
23. 23.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 34; // start at 34
    line 2: score = score - 4; // take away 4
    line 3: score = score - 5; // take away 3
    line 4: show(score); // show it
24. 24.👥 A cricket club app has 210 players, 150 coaches and 95 fans as users. How many more players than coaches are there?
25. 25.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 37; // start at 35
    line 2: stars = stars - 3; // take away 3
    line 3: stars = stars + 2; // add 2
    line 4: show(stars); // show it
26. 26.🐞 What is a good first step when an app gives a wrong result? (a) add more colours (b) buy a new phone (c) find where it goes wrong (d) delete the app
27. 27.True or false: a final design looks like the real app. (a) True (b) False
28. 28.True or false: the button colours is about UX (the experience). (a) True (b) False
29. 29.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) show arrival time (b) change the bus icon (c) a dark mode (d) rate the driver
30. 30.🧭 Which part of navigation hides extra links? (a) a tab bar (b) the back button (c) a menu button
31. 31.True or false: a lost-and-found board solves a real problem. (a) True (b) False
32. 32.Which of these is an output? (a) adding up a bill (b) taking a photo (c) a pop-up message (d) tapping a button
33. 33.🧪 What is the actual result of a test? (a) what we hope for (b) the app’s name (c) the test’s number (d) what the app really does
34. 34.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Sign Up
    [switch] Sound
    [button] Save
    [text box] Notes
    [text box] Age
    [text box] Due date
35. 35.Which of these is data? (a) tap to Start (b) a box to type a name (c) tap to Save (d) today’s step count
36. 36.👆 The user types Aman in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Hello, " + nameBox.text + "!";
    }; (a) Aman (b) Hello, nameBox.text! (c) Hello, Aman! (d) Hello!
37. 37.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 5 or more right answers.
    function result(right) {
      if (right >= 5) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(6) → expected Pass
    Test 2: result(2) → expected Try again
    Test 3: result(9) → expected Pass
38. 38.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
39. 39.Which of these is an input? (a) typing your age (b) a buzz (vibration) (c) working out a tip (d) sorting the scores
40. 40.Which of these is a user need? (a) a reminder alarm (b) “I keep missing the bus” (c) a dark mode switch (d) a search bar

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