App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 925 · 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.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
2. 2.🧩 Which part lets the user give the app information? (a) an icon (b) a logo (c) an input (d) a title
3. 3.🧭 Which part of navigation sits at the bottom? (a) a menu button (b) the back button (c) a tab bar
4. 4.🔀 What number does this shop app show?
   let total = 750;
   if (total > 500) {
     total = total - 50;
   }
   show(total);
5. 5.🐞 Each comment says what its line SHOULD do. Which line has the bug?
   line 1: let coins = 50; // start at 50
   line 2: coins = coins - 5; // take away 4
   line 3: coins = coins - 3; // take away 3
   line 4: show(coins); // show it (a) line 3 (b) line 2 (c) line 1
6. 6.True or false: a racing challenge is a learning app. (a) False (b) True
7. 7.🔁 What number does this code show?
   let steps = [22, 16, 52, 68];
   let count = 0;
   for (let i = 0; i < steps.length; i++) {
     if (steps[i] >= 40) {
       count = count + 1;
     }
   }
   show(count);
8. 8.Which of these happens at the plan stage? (a) sketch the screens (b) let friends try it (c) write the code (d) write down the bugs
9. 9.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) output (c) processing
10. 10.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(31));
11. 11.True or false: a bus tracker is the best fit for a grandparent with weak eyesight. (a) True (b) False
12. 12.Which of these is a screen? (a) tap to Send (b) the log-in page (c) a date picker (d) your saved notes
13. 13.🚀 Your app is at version 1.3.2. The next release adds a new feature. What is its version number? (a) 1.4.2 (b) 1.4.0 (c) 1.3.3 (d) 2.0.0
14. 14.🚀 Your app is at version 2.12.3. The next release fixes a small bug. What is its version number? (a) 3.0.0 (b) 2.13.3 (c) 2.13.0 (d) 2.12.4
15. 15.🔢 In a quiz-app flow, which comes FIRST? (a) pick an answer (b) read a question (c) tap “Start quiz” (d) see if it is right
16. 16.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 36; // start at 33
    line 2: lives = lives * 2; // double it
    line 3: lives = lives - 1; // take away 1
    line 4: show(lives); // show it
17. 17.True or false: how many taps it takes is about UI (the look). (a) True (b) False
18. 18.🧩 In an app, what is tap to Save? (a) a screen (b) a button (c) data (d) an input
19. 19.Which of these requests is fair? (a) calculator → location (b) timer → your photos (c) calling app → contacts (d) torch → contacts
20. 20.🧭 About how many tabs suit a tab bar best? (a) 20 (b) 3 to 5 (c) 1 (d) 10 to 12
21. 21.👆 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) Hi! (b) Hi, nameBox.text! (c) Hi, Aman! (d) Aman
22. 22.🔢 In a sign-up flow, which comes first: “see the home screen” or “open the app”? (a) see the home screen (b) open the app
23. 23.True or false: the search box changes is a text event. (a) False (b) True
24. 24.🗒️ Version 1 of a bus tracker must be ready in 12 days. How many days are left for extras after the must-haves?
    see where the bus is: 3 days
    show arrival time: 3 days
    pick your bus stop: 5 days
25. 25.🔢 In a sign-up flow, which comes first: “open the app” or “type name and email”? (a) type name and email (b) open the app
26. 26.🔀 What does this PIN rule show?
    let pin = "87406";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    } (a) Use 4 digits (b) PIN saved
27. 27.🔢 In a photo-post flow, what comes right after “add a filter”? (a) post the photo (b) take the photo (c) open the camera screen (d) write a caption
28. 28.🔍 Which is the odd one out? (a) sketch the screens (b) let friends try it (c) draw the user flow (d) pick the features
29. 29.🔍 Which is the odd one out? (a) a cricket run chase (b) a times-table quiz (c) a word battle (d) a puzzle with levels
30. 30.🔢 After an app is released, what comes right after “fix and improve”? (a) list what to fix (b) release an update (c) read user reviews (d) test it again
31. 31.🎨 Is this about UI or UX: the font size? (a) UX (b) UI
32. 32.🔀 What number does this shop app show?
    let total = 360;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
33. 33.Which of these is true of a wireframe? (a) shows the real fonts (b) has the real colours (c) uses the final pictures (d) shows where things go
34. 34.👆 What kind of event is this: the user taps Play? (a) a text event (b) a timer event (c) a tap event (d) a load event
35. 35.🔢 In a photo-post flow, which comes first: “write a caption” or “open the camera screen”? (a) open the camera screen (b) write a caption
36. 36.🐞 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 32
    line 2: points = points - 1; // take away 1
    line 3: points = points + 3; // add 3
    line 4: show(points); // show it
37. 37.👆 “On tap → do this” links an event to ___. (a) a charger (b) a web address (c) an action (d) a font
38. 38.🔐 Which permission does a birthday list of friends really need? (a) the microphone (b) contacts (c) the camera (d) location
39. 39.♿ A screen has 11 icon buttons. Only 2 of them have a text label for screen readers. How many still need a label?
40. 40.True or false: you list what users need at the plan stage. (a) True (b) False

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