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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 183 · 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.🔁 What number does this code show?
    let scores = [1, 3, 14];
    let total = 0;
    for (let i = 0; i < scores.length; i++) {
      total = total + scores[i];
    }
    show(total);
  2. 2.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) pie-chart colours (b) show the balance (c) export to a file (d) savings stickers
  3. 3.🎯 Is this a user need or a feature: “Small text is hard”? (a) a feature (b) a user need
  4. 4.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  5. 5.True or false: a draft you are typing fits saving in the cloud. (a) False (b) True
  6. 6.🔀 Which badge does this quiz app show?
    let marks = 50;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Silver (b) Gold (c) Bronze
  7. 7.🔁 list.length tells you ___. (a) the first item (b) how many items it has (c) the last item (d) the biggest item
  8. 8.📅 An app team plans for 2 days, builds for 10 days, tests for 1 days and releases on 1 more day. How many days does the whole project take?
  9. 9.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
  10. 10.🧪 What is the ACTUAL result of Test 1?
    🎟️ Rule: a ticket costs 50 for children under 12, and 100 for everyone else.
    function price(age) {
      if (age < 12) {
        return 50;
      }
      return 100;
    }
    Test 1: price(11) → expected 50
    Test 2: price(18) → expected 100
    Test 3: price(12) → expected 100
  11. 11.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    missing the bus: 24 votes
    forgetting homework: 11 votes
    wasting pocket money: 22 votes     (a) wasting pocket money (b) forgetting homework (c) missing the bus
  12. 12.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Cart → Shop
    Design B: Home → Item → Pay → Shop → Menu → Confirm
  13. 13.Which of these is true of a tab bar? (a) undoes one move (b) opens a list of pages (c) goes to the last screen (d) switches main sections
  14. 14.🗂️ What kind of app is a step counter? (a) a tool app (b) a learning app (c) a health app (d) a game
  15. 15.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 8 or more right answers.
    function result(right) {
      if (right >= 8) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(10) → expected Pass
    Test 2: result(8) → expected Pass
    Test 3: result(6) → expected Try again
  16. 16.💾 What is a variable? (a) a phone setting (b) a type of screen (c) a named box for a value (d) a picture
  17. 17.💡 A good app idea starts with ___. (a) a cool logo (b) a problem to solve (c) many colours (d) a long name
  18. 18.Which of these is an input? (a) tap to go Next (b) the home page of an app (c) a slider for volume (d) your high score
  19. 19.💡 Does an app idea like a medicine reminder solve a real problem? (a) No (b) Yes
  20. 20.👥 A library app has 90 readers, 25 librarians and 225 volunteers as users. How many users does it have in all?
  21. 21.🖼️ In this wireframe (top to bottom), what is right above the Save button?
    [ tab bar ]
    [ filter buttons ]
    [ list of items ]
    [ menu icon ]
    [ top bar ]
    [ Save button ]     (a) top bar (b) tab bar (c) filter buttons (d) list of items
  22. 22.🖼️ In this wireframe (top to bottom), what is right above the tab bar?
    [ list of items ]
    [ filter buttons ]
    [ menu icon ]
    [ Save button ]
    [ top bar ]
    [ tab bar ]     (a) Save button (b) menu icon (c) list of items (d) top bar
  23. 23.🧪 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(7) → expected Pass
    Test 2: result(2) → expected Try again
    Test 3: result(10) → expected Pass
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Send button: 32 px tall
    Next button: 36 px tall
  25. 25.🎯 Why learn about users before you build? (a) to make it longer (b) to build what they need (c) to pick a logo (d) to slow it down
  26. 26.🧪 How many of these test cases pass?
    🚚 Rule: delivery is free (0) when the order is 400 or more; otherwise it costs 40.
    function delivery(total) {
      if (total >= 400) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(200) → expected 40
    Test 2: delivery(450) → expected 0
    Test 3: delivery(400) → expected 0
  27. 27.True or false: a water reminder is the best fit for a teen whose money runs out by Friday. (a) False (b) True
  28. 28.True or false: the user taps Play is a timer event. (a) True (b) False
  29. 29.♿ A screen has 7 icon buttons. Only 4 of them have a text label for screen readers. How many still need a label?
  30. 30.✏️ Is this true of a wireframe or of a final design: is a quick sketch? (a) a final design (b) a wireframe
  31. 31.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 7 or more right answers.
    function result(right) {
      if (right > 7) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(9) → expected Pass
    Test 2: result(7) → expected Pass
    Test 3: result(4) → expected Try again     (a) Test 2 (b) Test 1 (c) Test 3
  32. 32.👥 A library app has 100 readers, 300 librarians and 35 volunteers as users. How many more librarians than readers are there?
  33. 33.True or false: how users feel after is about UX (the experience). (a) True (b) False
  34. 34.🧰 What does this code show?
    function greet(name) {
      return "Welcome, " + name + "!";
    }
    show(greet("Arjun"));     (a) Welcome, Arjun! (b) Arjun (c) Welcome, name! (d) greet
  35. 35.📅 An app team plans for 2 days, builds for 11 days, tests for 1 days and releases on 1 more day. How many more days does building take than testing?
  36. 36.🎯 Is this a user need or a feature: “I forget my homework”? (a) a feature (b) a user need
  37. 37.🧩 What do we call one full page of an app? (a) a screen (b) a battery (c) a variable (d) a cable
  38. 38.🎯 Is this a user need or a feature: a share button? (a) a feature (b) a user need
  39. 39.🔐 Is this permission request fair or too much: map app → location? (a) too much (b) fair
  40. 40.🔍 Which is the odd one out? (a) the screen layout (b) how users feel after (c) the button colours (d) the icon shapes

Answer key

  1. 18
  2. show the balance
  3. a user need
  4. True
  5. False
  6. Silver
  7. how many items it has
  8. 14
  9. input
  10. 50
  11. missing the bus
  12. 3
  13. switches main sections
  14. a health app
  15. 3
  16. a named box for a value
  17. a problem to solve
  18. a slider for volume
  19. Yes
  20. 340
  21. top bar
  22. top bar
  23. 3
  24. 1
  25. to build what they need
  26. 3
  27. False
  28. False
  29. 3
  30. a wireframe
  31. Test 2
  32. 200
  33. True
  34. Welcome, Arjun!
  35. 10
  36. a user need
  37. a screen
  38. a feature
  39. fair
  40. how users feel after

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