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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 806 · 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 sign-up flow, what comes right after “type name and email”? (a) make a password (b) enter the code sent (c) open the app (d) see the home screen
  2. 2.🧩 What do we call one full page of an app? (a) a screen (b) a battery (c) a cable (d) a variable
  3. 3.Which of these fits saving on the phone? (a) your last game level (b) a class leaderboard (c) chat messages to friends (d) a shared to-do list
  4. 4.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Body text: 13 px
    Title: 20 px
    Footer: 10 px
  5. 5.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ list of items ]
    [ tab bar ]
    [ big picture ]
    [ top bar ]     (a) top bar (b) list of items (c) big picture (d) tab bar
  6. 6.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(35));
  7. 7.💡 Which app idea solves this problem: Grandpa forgets his tablets? (a) a bill splitter (b) a lost-and-found board (c) a medicine reminder (d) a homework planner
  8. 8.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Body text: 15 px
    Footer: 21 px
    Title: 18 px
  9. 9.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ title text ]
    [ big picture ]
    [ Add button ]
    [ menu icon ]
    [ search box ]     (a) search box (b) big picture (c) menu icon (d) Add button
  10. 10.🖼️ In this wireframe (top to bottom), what is right above the title text?
    [ list of items ]
    [ title text ]
    [ top bar ]
    [ tab bar ]     (a) top bar (b) list of items (c) tab bar
  11. 11.🧪 What is the ACTUAL result of Test 1?
    🎟️ Rule: a ticket costs 50 for children under 9, and 100 for everyone else.
    function price(age) {
      if (age < 9) {
        return 50;
      }
      return 100;
    }
    Test 1: price(9) → expected 100
    Test 2: price(5) → expected 50
    Test 3: price(10) → expected 100
  12. 12.🔍 Which is the odd one out? (a) checking a password (b) sorting the scores (c) adding up a bill (d) tapping a button
  13. 13.True or false: photos on two devices fits saving on the phone. (a) True (b) False
  14. 14.True or false: the icon shapes is about UI (the look). (a) True (b) False
  15. 15.🚀 Which of these versions is the OLDEST?
    0.28.2, 1.19.9, 1.13.5, 1.4.5     (a) 0.28.2 (b) 1.19.9 (c) 1.4.5 (d) 1.13.5
  16. 16.⚙️ What number does this app show?
    let bill = 195; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  17. 17.👥 A library app has 40 readers, 195 librarians and 125 volunteers as users. How many users does it have in all?
  18. 18.🔢 In a food-order flow, which comes FIRST? (a) pay for the order (b) pick a dish (c) open the menu (d) add it to the cart
  19. 19.⚙️ What number does this app show?
    let km = 8; // typed by the user
    let metres = km * 1000;
    show(metres);
  20. 20.✏️ Why draw a wireframe before coding? (a) changes are quick (b) it adds colours (c) it saves data (d) it runs the app
  21. 21.🧪 One test case fails. Which one?
    📝 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(7) → expected Pass
    Test 2: result(6) → expected Pass
    Test 3: result(4) → expected Try again     (a) Test 3 (b) Test 1 (c) Test 2
  22. 22.🎨 UX stands for user ___. (a) extra (b) experience (c) express (d) example
  23. 23.👆 The user taps the button 1 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
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 171; // typed by the user
    line 2: let friends = 3; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 4 (b) line 2 (c) line 1 (d) line 3
  25. 25.🔁 What is the LAST line this code shows?
    let names = ["Aman", "Meera", "Zoya", "Kabir", "Riya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Riya (b) Hi, Meera (c) Hi, Zoya (d) Hi, Aman
  26. 26.True or false: the app starts up is a load event. (a) True (b) False
  27. 27.🧩 In an app, what is a box to type a name? (a) data (b) a screen (c) an input (d) a button
  28. 28.True or false: sorting the scores is processing. (a) False (b) True
  29. 29.👥 A clinic app has 95 patients, 155 doctors and 140 nurses as users. How many users does it have in all?
  30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 340; // typed by the user
    line 2: let off = 10; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay);     (a) line 4 (b) line 2 (c) line 1 (d) line 3
  31. 31.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Footer: 20 px
    Caption: 16 px
    Label: 14 px     (a) Caption (b) Footer (c) Label
  32. 32.True or false: a homework photo scanner needs the camera. (a) True (b) False
  33. 33.🗒️ What is a must-have feature? (a) one the app cannot skip (b) a sound effect (c) a nice extra (d) a colour theme
  34. 34.🔢 When you make an app, which comes first: “build the app” or “release it”? (a) release it (b) build the app
  35. 35.True or false: you sketch the screens at the idea stage. (a) True (b) False
  36. 36.🔢 In a quiz-app flow, which comes first: “pick an answer” or “tap “Start quiz””? (a) pick an answer (b) tap “Start quiz”
  37. 37.🔀 When does the else part run? (a) always (b) when the test is true (c) never (d) when the test is false
  38. 38.True or false: taking a photo is processing. (a) False (b) True
  39. 39.True or false: a draft you are typing fits saving in the cloud. (a) True (b) False
  40. 40.📱 Which one comes from an app store: an app or a website? (a) an app (b) a website

Answer key

  1. make a password
  2. a screen
  3. your last game level
  4. 2
  5. top bar
  6. 105
  7. a medicine reminder
  8. 1
  9. search box
  10. list of items
  11. 100
  12. tapping a button
  13. False
  14. True
  15. 0.28.2
  16. 39
  17. 360
  18. open the menu
  19. 8000
  20. changes are quick
  21. Test 2
  22. experience
  23. ON
  24. line 3
  25. Hi, Riya
  26. True
  27. an input
  28. True
  29. 390
  30. line 3
  31. Label
  32. True
  33. one the app cannot skip
  34. build the app
  35. False
  36. tap “Start quiz”
  37. when the test is false
  38. False
  39. False
  40. an app

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