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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 478 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.True or false: how many taps it takes is about UX (the experience). (a) True (b) False
  2. 2.True or false: buttons almost touching is poor button design. (a) True (b) False
  3. 3.👆 What kind of event is this: a countdown hits zero? (a) a text event (b) a tap event (c) a load event (d) a timer event
  4. 4.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 37; // start at 35
    line 2: coins = coins + 5; // add 5
    line 3: coins = coins + 2; // add 2
    line 4: coins = coins - 3; // take away 3
    line 5: show(coins); // show it
  5. 5.🎯 What is the best first step to learn what users need? (a) write the code (b) pick the colours (c) ask and watch users (d) guess on your own
  6. 6.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(50, 5));
  7. 7.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) input (c) output
  8. 8.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ title text ]
    [ filter buttons ]
    [ list of items ]
    [ menu icon ]
    [ top bar ]     (a) title text (b) filter buttons (c) top bar (d) menu icon
  9. 9.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) a buzz (vibration) (d) typing your age
  10. 10.🧩 Which part lets the user give the app information? (a) an input (b) an icon (c) a title (d) a logo
  11. 11.🧭 Where is a tab bar usually placed in a phone app? (a) in the middle (b) at the bottom (c) inside a button (d) nowhere
  12. 12.🔁 What is the LAST line this code shows?
    let names = ["Arjun", "Zoya", "Meera", "Kabir"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Kabir (b) Hi, Zoya (c) Hi, Meera (d) Hi, Arjun
  13. 13.🧪 What is the ACTUAL result of Test 2?
    🚚 Rule: delivery is free (0) when the order is 700 or more; otherwise it costs 40.
    function delivery(total) {
      if (total >= 700) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(750) → expected 0
    Test 2: delivery(900) → expected 0
    Test 3: delivery(600) → expected 40
  14. 14.🎯 Which app would help this user most: a student who keeps forgetting due dates? (a) a water reminder (b) a homework planner (c) a bus tracker (d) a recipe finder
  15. 15.🔍 Which is the odd one out? (a) a sleep tracker (b) a torch (c) a step counter (d) a water reminder
  16. 16.🔀 What does this sign-up rule show?
    let age = 10;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Welcome! (b) Ask a parent
  17. 17.🔢 In a food-order flow, what comes right after “open the menu”? (a) check the cart (b) pick a dish (c) pay for the order (d) add it to the cart
  18. 18.🔀 What number does this shop app show?
    let total = 330;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  19. 19.True or false: you write the store text at the release stage. (a) True (b) False
  20. 20.💾 Which can hold many values in order? (a) a list (b) a single number (c) a switch (d) a button
  21. 21.📊 Survey: which problem bugs you most? How many students voted in all?
    no quiet study place: 8 votes
    forgetting homework: 10 votes
    losing water bottles: 21 votes
  22. 22.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(75, 2));
  23. 23.🎨 Who should you test the UX with? (a) nobody (b) only yourself (c) real users (d) the app icon
  24. 24.True or false: a page of random dots solves a real problem. (a) True (b) False
  25. 25.✏️ What is a wireframe? (a) a type of password (b) a simple screen sketch (c) the finished app (d) a charging cable
  26. 26.🎯 What is a user need? (a) a colour theme (b) a type of button (c) a phone setting (d) a problem a user has
  27. 27.True or false: tap to Save is an input. (a) True (b) False
  28. 28.🛠️ At which stage do you put it on an app store? (a) the build stage (b) the release stage (c) the idea stage (d) the test stage
  29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 190; // typed by the user
    line 2: let off = 50; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 3 (b) line 4 (c) line 2 (d) line 1
  30. 30.💡 Does an app idea like a library due-date alert solve a real problem? (a) No (b) Yes
  31. 31.🚀 Which of these versions is the OLDEST?
    1.2.8, 1.18.9, 0.20.9, 1.10.5     (a) 1.18.9 (b) 0.20.9 (c) 1.10.5 (d) 1.2.8
  32. 32.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Score card”
    2. open “Edit photo”
    3. tap the Profile tab
    Which screen are you on now?     (a) Edit photo (b) Home (c) Profile (d) Score card
  33. 33.👆 The user taps the button 1 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 5) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  34. 34.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let score = 48; // start at 45
    line 2: score = score - 3; // take away 3
    line 3: score = score - 5; // take away 5
    line 4: score = score - 3; // take away 3
    line 5: show(score); // show it
  35. 35.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) rate the driver (b) a dark mode (c) change the bus icon (d) pick your bus stop
  36. 36.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) water animations (b) share your streak (c) set a reminder time (d) custom alert sounds
  37. 37.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 45; // start at 44
    line 2: points = points + 6; // add 6
    line 3: points = points - 3; // take away 3
    line 4: points = points * 2; // double it
    line 5: show(points); // show it
  38. 38.🖼️ How many parts (boxes) does this wireframe have?
    [ menu icon ]
    [ search box ]
    [ filter buttons ]
    [ big picture ]
  39. 39.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Hint: 17 px
    Footer: 14 px
    Title: 20 px     (a) Footer (b) Hint (c) Title
  40. 40.🔢 In a sign-up flow, which comes first: “tap “Sign up”” or “type name and email”? (a) type name and email (b) tap “Sign up”

Answer key

  1. True
  2. True
  3. a timer event
  4. 41
  5. ask and watch users
  6. 250
  7. output
  8. top bar
  9. typing your age
  10. an input
  11. at the bottom
  12. Hi, Kabir
  13. 0
  14. a homework planner
  15. a torch
  16. Ask a parent
  17. pick a dish
  18. 330
  19. True
  20. a list
  21. 39
  22. 150
  23. real users
  24. False
  25. a simple screen sketch
  26. a problem a user has
  27. False
  28. the release stage
  29. line 3
  30. Yes
  31. 0.20.9
  32. Profile
  33. 1
  34. 34
  35. pick your bus stop
  36. set a reminder time
  37. 94
  38. 4
  39. Footer
  40. tap “Sign up”

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