App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 678 · 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.📱 Which one has a web address: an app or a website? (a) an app (b) a website
2. 2.🐞 This code has a bug. What number does it ACTUALLY show?
   line 1: let coins = 49; // start at 49
   line 2: coins = coins + 4; // add 4
   line 3: coins = coins + 2; // double it
   line 4: show(coins); // show it
3. 3.📱 Which one opens from a link: an app or a website? (a) an app (b) a website
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 48 px tall
   Save button: 24 px tall
   Back button: 64 px tall
   Start button: 72 px tall (a) Back (b) Save (c) Start (d) Help
5. 5.🔢 In a photo-post flow, which comes LAST? (a) open the camera screen (b) write a caption (c) add a filter (d) post the photo
6. 6.⚙️ What number does this app show?
   let bill = 210; // typed by the user
   let friends = 3; // typed by the user
   let share = bill / friends;
   show(share);
7. 7.Which of these is a button? (a) your high score (b) today’s step count (c) tap to Start (d) the log-in page
8. 8.True or false: speaking a command is an output. (a) False (b) True
9. 9.🗒️ What is a must-have feature? (a) a colour theme (b) a nice extra (c) one the app cannot skip (d) a sound effect
10. 10.🔁 What is the LAST line this code shows?
    let names = ["Meera", "Zoya", "Aman", "Riya", "Kabir"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Zoya (b) Hi, Kabir (c) Hi, Meera (d) Hi, Aman
11. 11.🎯 An app for “everyone” with no clear user usually ___. (a) needs no testing (b) helps nobody well (c) wins every prize (d) is easy to build
12. 12.🧪 What is the ACTUAL result of Test 3?
    🚚 Rule: delivery is free (0) when the order is 500 or more; otherwise it costs 40.
    function delivery(total) {
      if (total >= 500) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(800) → expected 0
    Test 2: delivery(500) → expected 0
    Test 3: delivery(400) → expected 40
13. 13.Which of these is true of a website? (a) is installed on a phone (b) comes from an app store (c) has a web address (d) has a home-screen icon
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 3; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
15. 15.🗒️ In MVP, the M stands for ___. (a) music (b) mobile (c) minimum (d) maximum
16. 16.🧩 How many buttons does this app screen have?
    [title] Add Homework
    [text box] Name
    [button] Done
    [slider] Volume
    [text box] Email
17. 17.🔁 What number does this code show?
    let runs = [14, 91, 49, 21, 36];
    let count = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
18. 18.🔍 Which is the odd one out? (a) sudden loud sounds (b) colour as the only clue (c) icons with no labels (d) labels on every icon
19. 19.True or false: a recipe finder is the best fit for a pupil juggling five projects. (a) False (b) True
20. 20.🖼️ In this wireframe (top to bottom), what is right above the list of items?
    [ top bar ]
    [ search box ]
    [ list of items ]
    [ title text ]
    [ tab bar ]
    [ Save button ] (a) tab bar (b) title text (c) top bar (d) search box
21. 21.👆 An event in an app is ___. (a) a kind of list (b) an app store (c) a colour theme (d) something that happens
22. 22.👆 The user taps the button 5 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
23. 23.Which of these is true of a menu button? (a) opens a list of pages (b) shows 3 to 5 icons (c) switches main sections (d) undoes one move
24. 24.Which of these is true of a wireframe? (a) uses the final pictures (b) looks like the real app (c) shows where things go (d) has the real colours
25. 25.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
26. 26.🔁 What is the LAST line this code shows?
    let names = ["Kabir", "Arjun", "Meera", "Zoya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Zoya (b) Hi, Arjun (c) Hi, Kabir (d) Hi, Meera
27. 27.🎨 Is this about UI or UX: how easy sign-up is? (a) UI (b) UX
28. 28.🛠️ At which stage do you share the download link? (a) the build stage (b) the release stage (c) the plan stage (d) the test stage
29. 29.True or false: a bus tracker is the best fit for a parent waiting at the bus stop. (a) True (b) False
30. 30.🔢 In a photo-post flow, which comes first: “open the camera screen” or “take the photo”? (a) take the photo (b) open the camera screen
31. 31.🔍 Which is the odd one out? (a) pick the features (b) sketch the screens (c) try every button (d) draw the user flow
32. 32.✏️ Is this true of a wireframe or of a final design: uses plain grey boxes? (a) a final design (b) a wireframe
33. 33.🧭 What does the back button usually do? (a) goes to the last screen (b) deletes the page (c) closes all apps (d) opens settings
34. 34.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pens → Results → Menu → Pay
    Design B: Home → Cart → Search → Pens (a) Design B (b) Design A
35. 35.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 43; // start at 43
    line 2: score = score - 4; // take away 1
    line 3: score = score + 2; // add 2
    line 4: show(score); // show it (a) line 1 (b) line 2 (c) line 3
36. 36.💡 How can you check that people really have the problem? (a) just guess (b) pick a colour (c) copy another app (d) ask possible users
37. 37.True or false: the sound on/off setting fits saving in the cloud. (a) False (b) True
38. 38.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(16));
39. 39.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a beep sound (c) a pop-up message (d) taking a photo
40. 40.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 60;
    }
    show(fee(12) + fee(3));

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