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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 180 · 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.👥 A clinic app has 295 patients, 300 doctors and 175 nurses as users. Which user group is the biggest? (a) doctors (b) patients (c) nurses
  2. 2.✏️ Is this true of a wireframe or of a final design: shows where things go? (a) a final design (b) a wireframe
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Cancel button: 64 px tall
    Start button: 68 px tall
    Back button: 48 px tall     (a) Back (b) Start (c) Save (d) Cancel
  4. 4.🎯 Is this a user need or a feature: a search bar? (a) a feature (b) a user need
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Back button: 64 px tall
    Cancel button: 32 px tall
  6. 6.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Size → Confirm → Pens → Search → Offers
    Design B: Home → Cart → Pens → Offers → Menu → Item → Pay
  7. 7.🔀 A screen with no way forward or back is called a ___. (a) dead end (b) tab bar (c) shortcut (d) home screen
  8. 8.True or false: a torch is a tool app. (a) False (b) True
  9. 9.🚀 A privacy policy tells users ___. (a) the app’s price (b) the screen size (c) the app’s colours (d) what data is collected
  10. 10.👆 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) ON (b) OFF
  11. 11.👆 The user taps the button 4 times. What number does the label show now?
    let points = 2;
    button.onTap = function () {
      points = points + 2;
      label.text = points;
    };
  12. 12.🗒️ What is a must-have feature? (a) a colour theme (b) a nice extra (c) one the app cannot skip (d) a sound effect
  13. 13.♿ Does this help everyone, or make the app harder to use: captions on videos? (a) makes it harder (b) helps everyone
  14. 14.🧪 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(1050) → expected 0
    Test 3: delivery(750) → expected 40
  15. 15.True or false: a step counter is a health app. (a) False (b) True
  16. 16.🔁 What number does this code show?
    let runs = [24, 54, 72, 26];
    let count = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
  17. 17.Which of these is processing? (a) working out a tip (b) speaking a command (c) a buzz (vibration) (d) a beep sound
  18. 18.Which of these is true of a wireframe? (a) uses the final pictures (b) looks like the real app (c) shows the real fonts (d) is a quick sketch
  19. 19.🔢 In a sign-up flow, which comes LAST? (a) see the home screen (b) open the app (c) make a password (d) tap “Sign up”
  20. 20.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(2) + points(4));
  21. 21.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let points = 34; // start at 34
    line 2: points = points - 2; // add 2
    line 3: points = points * 2; // double it
    line 4: points = points + 2; // add 2
    line 5: show(points); // show it     (a) line 1 (b) line 4 (c) line 3 (d) line 2
  22. 22.🔢 After an app is released, which comes LAST? (a) fix and improve (b) release an update (c) test it again (d) list what to fix
  23. 23.💡 Does an app idea like a lost-and-found board solve a real problem? (a) No (b) Yes
  24. 24.✏️ Is this true of a wireframe or of a final design: uses the final pictures? (a) a final design (b) a wireframe
  25. 25.🧩 Which of these is a button on this screen?
    [title] Add Homework
    [button] Send
    [text box] City
    [text box] Age
    [button] Help
    [button] Back
    [slider] Brightness     (a) Help (b) Age (c) City (d) Brightness
  26. 26.Which of these is true of a final design? (a) looks like the real app (b) has no real colours (c) uses plain grey boxes (d) shows where things go
  27. 27.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) pick a theme colour (b) set a due date (c) see tasks by day (d) add a homework task
  28. 28.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let stars = 43; // start at 43
    line 2: stars = stars - 5; // take away 4
    line 3: stars = stars + 4; // add 4
    line 4: stars = stars * 2; // double it
    line 5: show(stars); // show it
  29. 29.🔁 What does a loop do? (a) deletes code (b) saves photos (c) draws icons (d) repeats code
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
  31. 31.🎯 Which app would help this user most: a grandparent with weak eyesight? (a) a water reminder (b) a bus tracker (c) a homework planner (d) a big-text reader
  32. 32.📱 Which one has a home-screen icon: an app or a website? (a) an app (b) a website
  33. 33.🔀 What is a user flow? (a) the path through screens (b) a colour theme (c) a charging cable (d) a type of font
  34. 34.🧩 Which of these is a button on this screen?
    [title] Sign Up
    [slider] Volume
    [text box] Email
    [button] Save
    [text box] Due date     (a) Due date (b) Email (c) Volume (d) Save
  35. 35.✏️ Is this true of a wireframe or of a final design: uses plain grey boxes? (a) a wireframe (b) a final design
  36. 36.🔀 What does this battery rule show?
    let battery = 57;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Battery OK (b) Low battery
  37. 37.True or false: “strong colour contrast” helps everyone use the app. (a) True (b) False
  38. 38.⚙️ What number does this app show?
    let km = 15; // typed by the user
    let metres = km * 1000;
    show(metres);
  39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 94; // typed by the user
    line 2: let friends = 2; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 4 (b) line 2 (c) line 3 (d) line 1
  40. 40.🗒️ Version 1 of a homework planner must be ready in 10 days. How many days are left for extras after the must-haves?
    add a homework task: 1 days
    set a due date: 2 days
    see tasks by day: 3 days

Answer key

  1. doctors
  2. a wireframe
  3. Save
  4. a feature
  5. 1
  6. 5
  7. dead end
  8. True
  9. what data is collected
  10. ON
  11. 10
  12. one the app cannot skip
  13. helps everyone
  14. 40
  15. True
  16. 1
  17. working out a tip
  18. is a quick sketch
  19. see the home screen
  20. 70
  21. line 2
  22. release an update
  23. Yes
  24. a final design
  25. Help
  26. looks like the real app
  27. pick a theme colour
  28. 84
  29. repeats code
  30. 12
  31. a big-text reader
  32. an app
  33. the path through screens
  34. Save
  35. a wireframe
  36. Battery OK
  37. True
  38. 15000
  39. line 3
  40. 4

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