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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 980 · 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.🧩 How many buttons does this app screen have?
    [title] Settings
    [button] Send
    [text box] Notes
    [button] Help
    [text box] Name
  2. 2.🧩 In an app, what is tap to Start? (a) an input (b) data (c) a button (d) a screen
  3. 3.🎯 Why learn about users before you build? (a) to make it longer (b) to pick a logo (c) to slow it down (d) to build what they need
  4. 4.👆 “On tap → do this” links an event to ___. (a) a font (b) an action (c) a web address (d) a charger
  5. 5.🔀 Why plan the user flow before building? (a) to skip testing (b) to hide the buttons (c) to add more taps (d) so each step is clear
  6. 6.👆 The user taps the button 4 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
  7. 7.🗒️ The first small, working version of an app is often called an ___. (a) FAQ (b) CPU (c) URL (d) MVP
  8. 8.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Title: 20 px
    Caption: 10 px
    Footer: 11 px
  9. 9.🔍 Which is the odd one out? (a) a beep sound (b) a result on screen (c) sorting the scores (d) a buzz (vibration)
  10. 10.💡 Does an app idea like an app that just says hi solve a real problem? (a) No (b) Yes
  11. 11.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(4) + points(4));
  12. 12.♿ Does this help everyone, or make the app harder to use: sudden loud sounds? (a) makes it harder (b) helps everyone
  13. 13.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Sign Up
    [button] Done
    [button] Back
    [text box] Phone
    [button] Send
  14. 14.🧪 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(2) → expected Try again
    Test 2: result(10) → expected Pass
    Test 3: result(7) → expected Pass
  15. 15.True or false: the user types a letter is a text event. (a) False (b) True
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  17. 17.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Menu: 14 px
    Hint: 21 px
    Body text: 10 px
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Cancel button: 48 px tall
    Done button: 68 px tall     (a) Cancel (b) Back (c) Done
  19. 19.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Me tab
    2. open “Match report”
    3. tap the Quiz tab
    4. open “Map”
    5. open “Edit photo”
    How many times must you tap Back to reach the main screen of this tab?
  20. 20.📅 An app team plans for 2 days, builds for 6 days, tests for 1 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
  21. 21.🔐 Is this permission request fair or too much: calling app → contacts? (a) fair (b) too much
  22. 22.👆 The user types Aman in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Hi, " + nameBox.text + "!";
    };     (a) Aman (b) Hi, nameBox.text! (c) Hi! (d) Hi, Aman!
  23. 23.⚙️ What number does this app show?
    let km = 9; // typed by the user
    let metres = km * 1000;
    show(metres);
  24. 24.🔀 What is a user flow? (a) a colour theme (b) a charging cable (c) a type of font (d) the path through screens
  25. 25.True or false: a selfie sticker app needs the camera. (a) False (b) True
  26. 26.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(15, 6));
  27. 27.🗒️ Version 1 of a pocket-money tracker must be ready in 12 days. How many days are left for extras after the must-haves?
    add money received: 1 days
    add money spent: 1 days
    show the balance: 5 days
  28. 28.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 31; // start at 31
    line 2: lives = lives * 2; // double it
    line 3: lives = lives * 2; // double it
    line 4: lives = lives + 2; // double it
    line 5: show(lives); // show it     (a) line 4 (b) line 3 (c) line 2 (d) line 1
  29. 29.Which of these is processing? (a) typing your age (b) checking a password (c) tapping a button (d) a pop-up message
  30. 30.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 35; // start at 35
    line 2: score = score + 6; // add 3
    line 3: score = score - 1; // take away 1
    line 4: show(score); // show it
  32. 32.Which of these is a user need? (a) a reminder alarm (b) a search bar (c) a dark mode switch (d) “I keep missing the bus”
  33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  34. 34.Which of these app ideas solves a real problem? (a) a library due-date alert (b) a page of random dots (c) an app that just says hi (d) a button with no action
  35. 35.🔐 A torch app asks for your contacts. What should you do? (a) deny it (b) share them all (c) allow it (d) post them online
  36. 36.🔁 What number does this code show?
    let steps = [6, 16, 2, 5];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
  37. 37.🧩 In an app, what is the settings page? (a) an input (b) a button (c) a screen (d) data
  38. 38.🔢 In a sign-up flow, which comes LAST? (a) see the home screen (b) make a password (c) type name and email (d) tap “Sign up”
  39. 39.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) custom alert sounds (b) see today’s total (c) share your streak (d) water animations
  40. 40.🚀 Which of these versions is the NEWEST?
    2.2.9, 1.25.1, 2.10.0, 2.4.4     (a) 2.10.0 (b) 2.4.4 (c) 2.2.9 (d) 1.25.1

Answer key

  1. 2
  2. a button
  3. to build what they need
  4. an action
  5. so each step is clear
  6. OFF
  7. MVP
  8. 2
  9. sorting the scores
  10. No
  11. 90
  12. makes it harder
  13. 1
  14. 3
  15. True
  16. 12
  17. 2
  18. Back
  19. 2
  20. 8
  21. fair
  22. Hi, Aman!
  23. 9000
  24. the path through screens
  25. True
  26. 90
  27. 5
  28. line 4
  29. checking a password
  30. hard to read
  31. 40
  32. “I keep missing the bus”
  33. good design
  34. a library due-date alert
  35. deny it
  36. 29
  37. a screen
  38. see the home screen
  39. see today’s total
  40. 2.10.0

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