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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 34 · 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 museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 40;
    }
    show(fee(8) + fee(6));
  2. 2.Which of these is a user need? (a) a dark mode switch (b) a share button (c) a reminder alarm (d) “I keep missing the bus”
  3. 3.🔐 Which permission does a party-invite app for friends really need? (a) the camera (b) the microphone (c) contacts (d) location
  4. 4.🔁 What number does this code show?
    let steps = [1, 6, 9, 7, 5];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
  5. 5.True or false: notes to read offline fits saving in the cloud. (a) True (b) False
  6. 6.Which of these is true of a menu button? (a) goes to the last screen (b) sits at the bottom (c) opens a list of pages (d) undoes one move
  7. 7.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) red on green (d) dark blue on black
  8. 8.🧪 One test case fails. Which one?
    📝 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(7) → expected Pass
    Test 2: result(5) → expected Pass
    Test 3: result(4) → expected Try again     (a) Test 1 (b) Test 3 (c) Test 2
  9. 9.🚀 Which of these versions is the NEWEST?
    2.19.3, 2.7.1, 1.21.6, 2.18.0     (a) 2.19.3 (b) 2.18.0 (c) 1.21.6 (d) 2.7.1
  10. 10.Which of these happens at the idea stage? (a) write down the bugs (b) list what users need (c) connect the data (d) pick the features
  11. 11.🧪 One test case fails. Which one?
    🎟️ Rule: a ticket costs 50 for children under 8, and 100 for everyone else.
    function price(age) {
      if (age <= 8) {
        return 50;
      }
      return 100;
    }
    Test 1: price(9) → expected 100
    Test 2: price(8) → expected 100
    Test 3: price(5) → expected 50     (a) Test 2 (b) Test 1 (c) Test 3
  12. 12.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let lives = 51; // start at 49
    line 2: lives = lives + 6; // add 6
    line 3: lives = lives + 4; // add 4
    line 4: show(lives); // show it
  13. 13.🔍 Which is the odd one out? (a) fast-flashing lights (b) strong colour contrast (c) big touch targets (d) labels on every icon
  14. 14.🗂️ What kind of app is a sleep tracker? (a) a health app (b) a learning app (c) a tool app (d) a game
  15. 15.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(3) + points(2));
  16. 16.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(4) + points(0));
  17. 17.🔁 What number does this code show?
    let marks = [7, 20, 13, 16, 4];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
  18. 18.🎯 Is this a user need or a feature: “What should I cook?”? (a) a user need (b) a feature
  19. 19.🧪 A test case is an input together with its ___. (a) screen colour (b) app icon (c) font size (d) expected result
  20. 20.True or false: space between buttons is good button design. (a) False (b) True
  21. 21.🔁 What is the LAST line this code shows?
    let names = ["Aman", "Zoya", "Riya", "Meera", "Kabir"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Aman (b) Hi, Zoya (c) Hi, Riya (d) Hi, Kabir
  22. 22.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) export to a file (b) savings stickers (c) pie-chart colours (d) add money spent
  23. 23.🗒️ 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: 2 days
    set a due date: 3 days
    see tasks by day: 2 days
  24. 24.👥 A school app has 120 students, 275 teachers and 20 parents as users. How many users does it have in all?
  25. 25.True or false: the button colours is about UI (the look). (a) False (b) True
  26. 26.🎨 UI stands for user ___. (a) idea (b) input (c) internet (d) interface
  27. 27.🖼️ In this wireframe (top to bottom), what is right below the top bar?
    [ big picture ]
    [ top bar ]
    [ list of items ]
    [ Add button ]     (a) big picture (b) list of items (c) Add button
  28. 28.👥 A cricket club app has 185 players, 195 coaches and 220 fans as users. How many users does it have in all?
  29. 29.🚀 In version 2.5.1, which number is the major version? (a) 1 (b) 251 (c) 2 (d) 5
  30. 30.🧰 What does this code show?
    function greet(name) {
      return "Hello, " + name + "!";
    }
    show(greet("Aman"));     (a) greet (b) Hello, name! (c) Hello, Aman! (d) Aman
  31. 31.💡 Does an app idea like a bill splitter solve a real problem? (a) No (b) Yes
  32. 32.True or false: a website needs no installing. (a) True (b) False
  33. 33.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(60, 6));
  34. 34.👆 What kind of event is this: the user taps Play? (a) a timer event (b) a load event (c) a tap event (d) a text event
  35. 35.🧩 Which of these is a button on this screen?
    [title] Add Homework
    [slider] Volume
    [button] Cancel
    [text box] Name     (a) Volume (b) Cancel (c) Name
  36. 36.🧪 Values right at a limit, like age 12 for “under 12”, are called ___. (a) easy cases (b) edge cases (c) phone cases (d) old cases
  37. 37.Which of these is true of a website? (a) needs no installing (b) is installed on a phone (c) updates from the store (d) has a home-screen icon
  38. 38.🧭 Why should every screen show where you are? (a) to look busy (b) to use more battery (c) to hide the menu (d) so users do not get lost
  39. 39.True or false: today’s step count is an input. (a) False (b) True
  40. 40.🧪 One test case fails. Which one?
    🚚 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(800) → expected 0
    Test 2: delivery(1050) → expected 0
    Test 3: delivery(700) → expected 40     (a) Test 3 (b) Test 2 (c) Test 1

Answer key

  1. 80
  2. “I keep missing the bus”
  3. contacts
  4. 28
  5. False
  6. opens a list of pages
  7. white on black
  8. Test 2
  9. 2.19.3
  10. list what users need
  11. Test 2
  12. 59
  13. fast-flashing lights
  14. a health app
  15. 60
  16. 50
  17. 60
  18. a user need
  19. expected result
  20. True
  21. Hi, Kabir
  22. add money spent
  23. 3
  24. 415
  25. True
  26. interface
  27. list of items
  28. 600
  29. 2
  30. Hello, Aman!
  31. Yes
  32. True
  33. 360
  34. a tap event
  35. Cancel
  36. edge cases
  37. needs no installing
  38. so users do not get lost
  39. False
  40. Test 1

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