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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 847 · 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.📱 Where do people usually download phone apps from? (a) a web server (b) a printer (c) an app store (d) a charger
  2. 2.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 46; // start at 46
    line 2: lives = lives + 2; // take away 2
    line 3: lives = lives + 2; // add 2
    line 4: lives = lives - 5; // take away 5
    line 5: show(lives); // show it     (a) line 3 (b) line 4 (c) line 2 (d) line 1
  3. 3.👆 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) OFF (b) ON
  4. 4.🗒️ Version 1 of a quiz app must be ready in 13 days. How many days are left for extras after the must-haves?
    show a question: 1 days
    check the answer: 4 days
    show the score: 2 days
  5. 5.♿ What should every icon-only button have for screen readers? (a) a bright colour (b) a text label (c) a long animation (d) a sound
  6. 6.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let points = 44; // start at 44
    line 2: points = points * 3; // double it
    line 3: points = points + 2; // add 2
    line 4: show(points); // show it     (a) line 1 (b) line 3 (c) line 2
  7. 7.🔁 list.length tells you ___. (a) the last item (b) how many items it has (c) the first item (d) the biggest item
  8. 8.🔍 Which is the odd one out? (a) a buzz (vibration) (b) tapping a button (c) a result on screen (d) a pop-up message
  9. 9.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Badges”
    2. tap the Lessons tab
    3. open “Edit photo”
    Which screen are you on now?     (a) Badges (b) Edit photo (c) Lessons (d) Quiz
  10. 10.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) pick a theme colour (b) see tasks by day (c) add a homework task (d) set a due date
  11. 11.🧭 Where is a tab bar usually placed in a phone app? (a) inside a button (b) in the middle (c) at the bottom (d) nowhere
  12. 12.True or false: you list what users need at the idea stage. (a) True (b) False
  13. 13.💡 Which app idea solves this problem: Grandpa forgets his tablets? (a) a homework planner (b) a bill splitter (c) a study-room finder (d) a medicine reminder
  14. 14.🔢 In a sign-up flow, what comes right after “type name and email”? (a) enter the code sent (b) see the home screen (c) make a password (d) tap “Sign up”
  15. 15.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 35; // start at 33
    line 2: points = points - 3; // take away 3
    line 3: points = points + 2; // add 2
    line 4: points = points - 1; // take away 1
    line 5: show(points); // show it
  16. 16.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Address → Size → Pay → Results → Confirm
    Design B: Home → Confirm → Pens → Search → Shop
  17. 17.🧪 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(7) → expected Try again
  18. 18.Which of these happens at the plan stage? (a) add the buttons (b) talk to possible users (c) list what users need (d) sketch the screens
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Next button: 36 px tall
    Help button: 32 px tall
  20. 20.🚀 Your app is at version 3.4.4. The next release fixes a small bug. What is its version number? (a) 4.0.0 (b) 3.5.4 (c) 3.4.5 (d) 3.5.0
  21. 21.Which of these is an input? (a) today’s step count (b) tap to Save (c) a box to type a name (d) tap to Send
  22. 22.👥 A clinic app has 165 patients, 220 doctors and 110 nurses as users. How many users does it have in all?
  23. 23.🐞 What is a bug? (a) a mistake in the code (b) a fast phone (c) a nice icon (d) a new feature
  24. 24.♿ Does this help everyone, or make the app harder to use: text that can grow? (a) helps everyone (b) makes it harder
  25. 25.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Aman", "Kabir", "Meera", "Arjun"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Kabir (b) Hi, Riya (c) Hi, Aman (d) Hi, Arjun
  26. 26.👥 A library app has 190 readers, 130 librarians and 275 volunteers as users. How many more readers than librarians are there?
  27. 27.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] New Note
    [text box] Name
    [switch] Remind me
    [button] Save
    [slider] Text size
    [text box] Subject
  28. 28.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 50; // start at 50
    line 2: score = score + 5; // add 4
    line 3: score = score * 2; // double it
    line 4: score = score - 3; // take away 3
    line 5: show(score); // show it
  29. 29.👥 A cricket club app has 150 players, 235 coaches and 245 fans as users. How many users does it have in all?
  30. 30.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  31. 31.🚀 Which version is newer: 4.12.0 or 4.3.2? (a) 4.3.2 (b) 4.12.0
  32. 32.🔁 What is the LAST line this code shows?
    let names = ["Arjun", "Zoya", "Riya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Riya (b) Hi, Zoya (c) Hi, Arjun
  33. 33.🔍 Which is the odd one out? (a) a puzzle with levels (b) a word battle (c) a water reminder (d) a cricket run chase
  34. 34.👆 What kind of event is this: the user taps Play? (a) a timer event (b) a text event (c) a load event (d) a tap event
  35. 35.True or false: the log-in page is a screen. (a) True (b) False
  36. 36.🗒️ Version 1 of a quiz app must be ready in 14 days. How many days are left for extras after the must-haves?
    show a question: 4 days
    check the answer: 2 days
    show the score: 4 days
  37. 37.🔐 Which permission does a weather-near-me app really need? (a) the microphone (b) contacts (c) location (d) the camera
  38. 38.Which of these is a screen? (a) your saved notes (b) a box to type a name (c) the log-in page (d) tap to go Next
  39. 39.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Address → Pay → Item → Menu → Search → Pens
    Design B: Home → Search → Menu → Pay → Results → Item
  40. 40.🗂️ What kind of app is a water reminder? (a) a game (b) a tool app (c) a learning app (d) a health app

Answer key

  1. an app store
  2. line 2
  3. ON
  4. 6
  5. a text label
  6. line 2
  7. how many items it has
  8. tapping a button
  9. Edit photo
  10. pick a theme colour
  11. at the bottom
  12. True
  13. a medicine reminder
  14. make a password
  15. 31
  16. 1
  17. 2
  18. sketch the screens
  19. 1
  20. 3.4.5
  21. a box to type a name
  22. 495
  23. a mistake in the code
  24. helps everyone
  25. Hi, Arjun
  26. 60
  27. 4
  28. 107
  29. 630
  30. poor design
  31. 4.12.0
  32. Hi, Riya
  33. a water reminder
  34. a tap event
  35. True
  36. 4
  37. location
  38. the log-in page
  39. 1
  40. a health app

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