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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 845 · 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.🚀 Which version is newer: 2.12.1 or 2.5.2? (a) 2.12.1 (b) 2.5.2
  2. 2.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) black on pale grey (d) light grey on white
  3. 3.🔢 After an app is released, which comes FIRST? (a) release an update (b) read user reviews (c) list what to fix (d) test it again
  4. 4.🔁 list.length tells you ___. (a) the last item (b) the biggest item (c) how many items it has (d) the first item
  5. 5.True or false: “fast-flashing lights” helps everyone use the app. (a) False (b) True
  6. 6.✏️ Is this true of a wireframe or of a final design: uses the final pictures? (a) a wireframe (b) a final design
  7. 7.🎯 Which app would help this user most: a grandparent with weak eyesight? (a) a recipe finder (b) a pocket-money tracker (c) a big-text reader (d) a bus tracker
  8. 8.True or false: grey text on grey is good button design. (a) False (b) True
  9. 9.🔀 What does this sign-up rule show?
    let age = 11;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Ask a parent (b) Welcome!
  10. 10.🧪 What is the ACTUAL result of Test 2?
    🎟️ 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
  11. 11.💾 In most code, the first item of a list is at position ___. (a) 1 (b) 0 (c) 10 (d) 2
  12. 12.🔢 In a quiz-app flow, what comes right after “tap “Start quiz””? (a) pick an answer (b) read a question (c) see the final score (d) see if it is right
  13. 13.🧩 Which input is best for typing your name? (a) a slider (b) a text box (c) a picture (d) a switch
  14. 14.👆 The user taps the button 6 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) OFF (b) ON
  15. 15.💡 After a survey, which need should version 1 solve? (a) the newest trend (b) the most common need (c) a random need (d) the rarest need
  16. 16.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let points = 44; // start at 41
    line 2: points = points + 6; // add 6
    line 3: points = points - 4; // take away 4
    line 4: show(points); // show it     (a) line 2 (b) line 3 (c) line 1
  17. 17.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Title: 24 px
    Hint: 28 px
    Footer: 9 px
    Menu: 25 px
    Label: 19 px     (a) Hint (b) Title (c) Menu (d) Footer
  18. 18.🔐 Is this permission request fair or too much: quiz app → microphone? (a) too much (b) fair
  19. 19.True or false: a 5-minute alarm ends is a timer event. (a) True (b) False
  20. 20.True or false: a result on screen is an output. (a) True (b) False
  21. 21.🔢 In a quiz-app flow, which comes LAST? (a) see the final score (b) tap “Start quiz” (c) see if it is right (d) read a question
  22. 22.🔀 Which badge does this quiz app show?
    let marks = 90;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Bronze (b) Silver (c) Gold
  23. 23.🗒️ Version 1 of a bus tracker must be ready in 11 days. How many days are left for extras after the must-haves?
    see where the bus is: 3 days
    show arrival time: 4 days
    pick your bus stop: 2 days
  24. 24.🧪 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(5) → expected Try again     (a) Test 3 (b) Test 1 (c) Test 2
  25. 25.🔀 With if / else if / else, how many parts run? (a) none (b) all of them (c) two (d) only one
  26. 26.✏️ Is this true of a wireframe or of a final design: shows where things go? (a) a wireframe (b) a final design
  27. 27.🛠️ At which stage do you talk to possible users? (a) the plan stage (b) the build stage (c) the idea stage (d) the test stage
  28. 28.🧩 How many buttons does this app screen have?
    [title] Add Homework
    [text box] Due date
    [button] Next
    [text box] Name
    [text box] Subject
    [button] Start
  29. 29.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(13));
  30. 30.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    no quiet study place: 9 votes
    wasting pocket money: 12 votes
    losing water bottles: 24 votes     (a) wasting pocket money (b) no quiet study place (c) losing water bottles
  31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // typed by the user
    line 2: let qty = 6; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 4 (b) line 2 (c) line 3 (d) line 1
  32. 32.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    wasting pocket money: 6 votes
    losing water bottles: 24 votes
    forgetting birthdays: 20 votes     (a) losing water bottles (b) forgetting birthdays (c) wasting pocket money
  33. 33.💾 What number does this code show?
    let points = 6;
    points = points - 1;
    points = points + 2;
    show(points);
  34. 34.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 45; // start at 42
    line 2: score = score * 2; // double it
    line 3: score = score + 6; // add 6
    line 4: show(score); // show it     (a) line 1 (b) line 2 (c) line 3
  35. 35.🗒️ The first small, working version of an app is often called an ___. (a) CPU (b) URL (c) FAQ (d) MVP
  36. 36.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) add a homework task (b) see tasks by day (c) share tasks to friends (d) set a due date
  37. 37.🔍 Which is the odd one out? (a) taking a photo (b) adding up a bill (c) speaking a command (d) typing your age
  38. 38.Which colour pair is easy to read? (a) dark blue on white (b) pale pink on white (c) yellow on white (d) dark blue on black
  39. 39.👆 The user taps the button 3 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
  40. 40.🔀 What does this sign-up rule show?
    let age = 9;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Welcome! (b) Ask a parent

Answer key

  1. 2.12.1
  2. black on pale grey
  3. read user reviews
  4. how many items it has
  5. False
  6. a final design
  7. a big-text reader
  8. False
  9. Ask a parent
  10. 50
  11. 0
  12. read a question
  13. a text box
  14. OFF
  15. the most common need
  16. line 1
  17. Footer
  18. too much
  19. True
  20. True
  21. see the final score
  22. Gold
  23. 2
  24. Test 2
  25. only one
  26. a wireframe
  27. the idea stage
  28. 2
  29. 39
  30. losing water bottles
  31. line 3
  32. losing water bottles
  33. 7
  34. line 1
  35. MVP
  36. share tasks to friends
  37. adding up a bill
  38. dark blue on white
  39. ON
  40. Ask a parent

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