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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 768 · 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.🔀 In a good flow, each screen should lead to ___. (a) the same screen (b) a dead end (c) a random page (d) a clear next step
  2. 2.💡 Does an app idea like a library due-date alert solve a real problem? (a) Yes (b) No
  3. 3.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 6 or more right answers.
    function result(right) {
      if (right >= 6) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(4) → expected Try again
    Test 2: result(6) → expected Pass
    Test 3: result(8) → expected Pass
  4. 4.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Settings tab
    2. open “Friend list”
    3. tap Back
    How many times must you tap Back to reach the main screen of this tab?
  5. 5.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Order Snacks
    [text box] Email
    [button] Cancel
  6. 6.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) confetti effects (b) an avatar shop (c) show a question (d) background music
  7. 7.Which of these fits saving in the cloud? (a) a draft you are typing (b) your last game level (c) the sound on/off setting (d) a shared to-do list
  8. 8.🔁 What number does this code show?
    let steps = [6, 11, 12, 3, 13];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
  9. 9.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Score card”
    2. open “Video”
    3. open “Video”
    4. tap Back
    5. tap the Settings tab
    Which screen are you on now?     (a) Settings (b) Video (c) Score card (d) Feed
  10. 10.👥 A library app has 85 readers, 275 librarians and 35 volunteers as users. Which user group is the biggest? (a) readers (b) librarians (c) volunteers
  11. 11.🗒️ Version 1 of a homework planner must be ready in 15 days. How many days are left for extras after the must-haves?
    add a homework task: 4 days
    set a due date: 3 days
    see tasks by day: 3 days
  12. 12.💡 Does an app idea like a bill splitter solve a real problem? (a) Yes (b) No
  13. 13.Which colour pair is hard to read? (a) white on black (b) red on green (c) black on pale grey (d) black on yellow
  14. 14.🔀 A screen with no way forward or back is called a ___. (a) shortcut (b) dead end (c) home screen (d) tab bar
  15. 15.🔀 What does this PIN rule show?
    let pin = "4377";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    }     (a) PIN saved (b) Use 4 digits
  16. 16.✏️ Is this true of a wireframe or of a final design: shows the real fonts? (a) a final design (b) a wireframe
  17. 17.📊 Survey: which problem bugs you most? How many students voted in all?
    wasting pocket money: 16 votes
    losing water bottles: 10 votes
    forgetting homework: 8 votes
  18. 18.🔀 Which badge does this quiz app show?
    let marks = 94;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Silver (b) Gold (c) Bronze
  19. 19.🔢 After an app is released, what comes right after “read user reviews”? (a) fix and improve (b) release an update (c) test it again (d) list what to fix
  20. 20.Which of these fits saving in the cloud? (a) a draft you are typing (b) chat messages to friends (c) notes to read offline (d) your last game level
  21. 21.True or false: an app has a web address. (a) True (b) False
  22. 22.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(65, 3));
  23. 23.🚀 Which version is newer: 4.6.12 or 4.6.4? (a) 4.6.12 (b) 4.6.4
  24. 24.🎨 Is this about UI or UX: how fast a task is done? (a) UI (b) UX
  25. 25.Which of these is processing? (a) a result on screen (b) taking a photo (c) checking a password (d) speaking a command
  26. 26.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let stars = 40; // start at 40
    line 2: stars = stars - 1; // take away 1
    line 3: stars = stars - 6; // add 6
    line 4: stars = stars * 2; // double it
    line 5: show(stars); // show it     (a) line 4 (b) line 2 (c) line 3 (d) line 1
  27. 27.💡 Which app idea solves this problem: the library is always full? (a) a lost-and-found board (b) a homework planner (c) a medicine reminder (d) a study-room finder
  28. 28.Which of these is an input? (a) a box to type a name (b) tap to Save (c) the log-in page (d) your high score
  29. 29.🔁 What number does this code show?
    let runs = [8, 7, 2];
    let best = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] > best) {
        best = runs[i];
      }
    }
    show(best);
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 275; // typed by the user
    line 2: let friends = 5; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 2 (b) line 1 (c) line 4 (d) line 3
  31. 31.🔔 What is a message an app shows on your lock screen called? (a) a wireframe (b) a web address (c) a notification (d) a variable
  32. 32.🎯 What is the best first step to learn what users need? (a) ask and watch users (b) pick the colours (c) write the code (d) guess on your own
  33. 33.🔐 Which permission does a barcode scanner really need? (a) the microphone (b) location (c) the camera (d) contacts
  34. 34.👆 The user taps the button 2 times. What number does the label show now?
    let coins = 0;
    button.onTap = function () {
      coins = coins + 1;
      label.text = coins;
    };
  35. 35.💡 Which app idea solves this problem: students cannot find a quiet room? (a) a study-room finder (b) a medicine reminder (c) a homework planner (d) a lost-and-found board
  36. 36.Which of these fits saving in the cloud? (a) photos on two devices (b) notes to read offline (c) the sound on/off setting (d) your last game level
  37. 37.🧰 How do you run (call) a function called greet? (a) greet[] (b) #greet (c) greet() (d) run greet
  38. 38.🧰 What does this code show?
    function greet(name) {
      return "Welcome, " + name + "!";
    }
    show(greet("Riya"));     (a) Welcome, name! (b) greet (c) Riya (d) Welcome, Riya!
  39. 39.🗒️ Version 1 of a homework planner must be ready in 11 days. How many days are left for extras after the must-haves?
    add a homework task: 2 days
    set a due date: 1 days
    see tasks by day: 5 days
  40. 40.🔁 What is the LAST line this code shows?
    let names = ["Arjun", "Riya", "Aman"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Arjun (b) Hi, Riya (c) Hi, Aman

Answer key

  1. a clear next step
  2. Yes
  3. 3
  4. 0
  5. 1
  6. show a question
  7. a shared to-do list
  8. 45
  9. Settings
  10. librarians
  11. 5
  12. Yes
  13. red on green
  14. dead end
  15. PIN saved
  16. a final design
  17. 34
  18. Gold
  19. list what to fix
  20. chat messages to friends
  21. False
  22. 195
  23. 4.6.12
  24. UX
  25. checking a password
  26. line 3
  27. a study-room finder
  28. a box to type a name
  29. 8
  30. line 3
  31. a notification
  32. ask and watch users
  33. the camera
  34. 2
  35. a study-room finder
  36. photos on two devices
  37. greet()
  38. Welcome, Riya!
  39. 3
  40. Hi, Aman

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