App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 101 · 40 questions

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.

1. 1.🗂️ What kind of app is a times-table quiz? (a) a game (b) a learning app (c) a health app (d) a tool app
2. 2.🔍 Which is the odd one out? (a) write the store text (b) let friends try it (c) write down the bugs (d) try every button
3. 3.🧰 What number does this code show?
   function points(stars) {
     return stars * 10 + 5;
   }
   show(points(2) + points(4));
4. 4.👆 The user taps the button 5 times. What number does the label show now?
   let likes = 0;
   button.onTap = function () {
     if (likes < 4) {
       likes = likes + 1;
     }
     label.text = likes;
   };
5. 5.👥 A clinic app has 175 patients, 260 doctors and 110 nurses as users. How many more patients than nurses are there?
6. 6.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 30; // typed by the user
   line 2: let qty = 3; // typed by the user
   line 3: let total = price * qty;
   line 4: show(total); (a) line 3 (b) line 4 (c) line 1 (d) line 2
7. 7.Which of these is about UI (the look)? (a) how users feel after (b) how easy sign-up is (c) the screen layout (d) whether users get lost
8. 8.🖼️ In this wireframe (top to bottom), what is right below the menu icon?
   [ Save button ]
   [ list of items ]
   [ menu icon ]
   [ top bar ]
   [ big picture ] (a) top bar (b) big picture (c) Save button (d) list of items
9. 9.Which of these is data? (a) a box to type a name (b) the game-over page (c) tap to Start (d) your saved notes
10. 10.🐞 A comment in code (after //) is for ___. (a) people reading the code (b) the phone screen (c) the app store (d) the battery
11. 11.True or false: the home page of an app is a screen. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) working out a tip (b) typing your age (c) tapping a button (d) speaking a command
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 40; // typed by the user
    line 2: let friends = 2; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 2 (b) line 4 (c) line 3 (d) line 1
14. 14.💾 Where should the app save notes to read offline: on the phone or in the cloud? (a) in the cloud (b) on the phone
15. 15.🧪 What is the ACTUAL result of Test 1?
    🎟️ Rule: a ticket costs 50 for children under 13, and 100 for everyone else.
    function price(age) {
      if (age < 13) {
        return 50;
      }
      return 100;
    }
    Test 1: price(13) → expected 100
    Test 2: price(17) → expected 100
    Test 3: price(11) → expected 50
16. 16.🛠️ At which stage do you put it on an app store? (a) the test stage (b) the plan stage (c) the idea stage (d) the release stage
17. 17.True or false: a big-text reader is the best fit for a reader who finds small print hard. (a) True (b) False
18. 18.👆 The user taps the button 4 times. What number does the label show now?
    let score = 6;
    button.onTap = function () {
      score = score + 3;
      label.text = score;
    };
19. 19.🔀 What does if / else let an app do? (a) save a photo (b) pick one of two actions (c) draw a screen (d) repeat forever
20. 20.True or false: your last game level fits saving on the phone. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Start button: 72 px tall
    Back button: 64 px tall
    Cancel button: 28 px tall (a) Back (b) Next (c) Cancel (d) Start
22. 22.🎯 Who are the users of an app? (a) the app icons (b) only the testers (c) only the coders (d) the people who use it
23. 23.🔍 Which is the odd one out? (a) colour as the only clue (b) labels on every icon (c) captions on videos (d) text that can grow
24. 24.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let score = 41; // start at 38
    line 2: score = score - 4; // take away 4
    line 3: score = score + 2; // add 2
    line 4: score = score * 2; // double it
    line 5: show(score); // show it
25. 25.True or false: tap to Start is a button. (a) True (b) False
26. 26.True or false: how fast a task is done is about UX (the experience). (a) True (b) False
27. 27.🧪 What is the actual result of a test? (a) the test’s number (b) the app’s name (c) what we hope for (d) what the app really does
28. 28.True or false: a torch is a game. (a) True (b) False
29. 29.True or false: how many taps it takes is about UX (the experience). (a) True (b) False
30. 30.🚀 Which version is newer: 2.4.1 or 2.17.0? (a) 2.4.1 (b) 2.17.0
31. 31.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) background music (b) an avatar shop (c) show the score (d) confetti effects
32. 32.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) add money spent (b) add money received (c) savings stickers (d) show the balance
33. 33.True or false: the user types a letter is a load event. (a) True (b) False
34. 34.Which of these is processing? (a) tapping a button (b) checking a password (c) a result on screen (d) a pop-up message
35. 35.👆 The user types Arjun in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Welcome, " + nameBox.text + "!";
    }; (a) Welcome, nameBox.text! (b) Welcome! (c) Welcome, Arjun! (d) Arjun
36. 36.Which of these happens at the test stage? (a) list what users need (b) spot a problem to solve (c) try every button (d) share the download link
37. 37.True or false: the search box changes is a load event. (a) True (b) False
38. 38.👆 The user taps the button 5 times. What number does the label show now?
    let coins = 7;
    button.onTap = function () {
      coins = coins + 2;
      label.text = coins;
    };
39. 39.🗂️ What kind of app is an alarm clock? (a) a learning app (b) a tool app (c) a health app (d) a game
40. 40.🎯 Is this a user need or a feature: a search bar? (a) a feature (b) a user need

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