App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 73 · 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.👆 The user taps the button 8 times. What number does the label show now?
   let likes = 0;
   button.onTap = function () {
     if (likes < 2) {
       likes = likes + 1;
     }
     label.text = likes;
   };
2. 2.Which of these is data? (a) tap to Save (b) tap to Start (c) your saved notes (d) tap to go Next
3. 3.🐞 Each comment says what its line SHOULD do. Which line has the bug?
   line 1: let score = 38; // start at 38
   line 2: score = score - 3; // add 3
   line 3: score = score - 4; // take away 4
   line 4: show(score); // show it (a) line 3 (b) line 2 (c) line 1
4. 4.Which of these is true of a final design? (a) shows where things go (b) is a quick sketch (c) looks like the real app (d) uses plain grey boxes
5. 5.🎨 Is this about UI or UX: whether users get lost? (a) UX (b) UI
6. 6.🎨 Is this about UI or UX: the icon shapes? (a) UX (b) UI
7. 7.True or false: an app needs no installing. (a) True (b) False
8. 8.True or false: a clear word like Save is good button design. (a) False (b) True
9. 9.🖼️ In this wireframe (top to bottom), what is right above the list of items?
   [ tab bar ]
   [ list of items ]
   [ Save button ]
   [ search box ] (a) Save button (b) search box (c) tab bar
10. 10.🧭 Which part of navigation switches main sections? (a) a tab bar (b) the back button (c) a menu button
11. 11.True or false: a tiny 20 px button is good button design. (a) True (b) False
12. 12.🖼️ In this wireframe (top to bottom), what is right below the Add button?
    [ top bar ]
    [ big picture ]
    [ list of items ]
    [ Add button ]
    [ menu icon ] (a) list of items (b) menu icon (c) top bar (d) big picture
13. 13.🗒️ When should nice-to-have features be built? (a) on day one (b) before anything (c) never (d) after the must-haves
14. 14.True or false: the log-in page is data. (a) True (b) False
15. 15.👥 A school app has 300 students, 90 teachers and 40 parents as users. Which user group is the biggest? (a) parents (b) students (c) teachers
16. 16.Which of these is true of a website? (a) opens in a web browser (b) has a home-screen icon (c) is installed on a phone (d) comes from an app store
17. 17.🐞 A comment in code (after //) is for ___. (a) people reading the code (b) the app store (c) the phone screen (d) the battery
18. 18.Which of these fits saving on the phone? (a) a shared to-do list (b) photos on two devices (c) chat messages to friends (d) your last game level
19. 19.👆 The user taps the button 6 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 4) {
        likes = likes + 1;
      }
      label.text = likes;
    };
20. 20.🧪 What is the ACTUAL result of Test 3?
    🚚 Rule: delivery is free (0) when the order is 800 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 800) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(950) → expected 0
    Test 2: delivery(650) → expected 40
    Test 3: delivery(800) → expected 0
21. 21.🎯 Is this a user need or a feature: a share button? (a) a feature (b) a user need
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Save button: 60 px tall
    Cancel button: 44 px tall
    Next button: 48 px tall
23. 23.👆 The user types Aman in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Well done, " + nameBox.text + "!";
    }; (a) Aman (b) Well done, Aman! (c) Well done! (d) Well done, nameBox.text!
24. 24.🧩 What do we call one full page of an app? (a) a variable (b) a screen (c) a cable (d) a battery
25. 25.🧩 In an app, what is a switch for dark mode? (a) data (b) an input (c) a button (d) a screen
26. 26.🔀 What does this sign-up rule show?
    let age = 11;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Welcome! (b) Ask a parent
27. 27.True or false: a unit converter is a health app. (a) False (b) True
28. 28.💡 Does an app idea like a bill splitter solve a real problem? (a) No (b) Yes
29. 29.True or false: a pocket-money tracker is the best fit for a teen whose money runs out by Friday. (a) True (b) False
30. 30.🚀 Which of these versions is the OLDEST?
    1.29.5, 2.13.5, 2.18.3, 2.7.2 (a) 2.7.2 (b) 2.18.3 (c) 2.13.5 (d) 1.29.5
31. 31.🎯 Why learn about users before you build? (a) to slow it down (b) to pick a logo (c) to build what they need (d) to make it longer
32. 32.True or false: the user presses Save is a text event. (a) False (b) True
33. 33.True or false: a party-invite app for friends needs the camera. (a) True (b) False
34. 34.🔐 Is this permission request fair or too much: quiz app → microphone? (a) fair (b) too much
35. 35.True or false: how easy sign-up is is about UX (the experience). (a) False (b) True
36. 36.🔀 What does >= mean? (a) less than (b) not equal (c) smaller or equal (d) greater than or equal
37. 37.Which of these is an input? (a) tap to go Next (b) tap to Send (c) your friends list (d) a slider for volume
38. 38.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let score = 52; // start at 49
    line 2: score = score + 5; // add 5
    line 3: score = score - 1; // take away 1
    line 4: show(score); // show it
39. 39.🎯 Is this a user need or a feature: “I forget my homework”? (a) a feature (b) a user need
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Start button: 48 px tall
    Cancel button: 44 px tall (a) Start (b) Cancel (c) Send

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