App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 446 · 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.True or false: “icons with no labels” helps everyone use the app. (a) True (b) False
2. 2.🧭 Why should every screen show where you are? (a) to use more battery (b) to hide the menu (c) so users do not get lost (d) to look busy
3. 3.🎯 An app for “everyone” with no clear user usually ___. (a) needs no testing (b) wins every prize (c) is easy to build (d) helps nobody well
4. 4.Which of these makes the app harder to use? (a) strong colour contrast (b) colour as the only clue (c) labels on every icon (d) big touch targets
5. 5.Which of these is true of the back button? (a) goes to the last screen (b) shows 3 to 5 icons (c) hides extra links (d) switches main sections
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 44 px tall
   Cancel button: 40 px tall
   Done button: 48 px tall
   Help button: 40 px tall
7. 7.🗒️ The first small, working version of an app is often called an ___. (a) MVP (b) URL (c) CPU (d) FAQ
8. 8.👆 The user taps the button 7 times. What number does the label show now?
   let likes = 0;
   button.onTap = function () {
     if (likes < 2) {
       likes = likes + 1;
     }
     label.text = likes;
   };
9. 9.🧭 Which part of navigation hides extra links? (a) the back button (b) a tab bar (c) a menu button
10. 10.🧰 What does return do in a function? (a) repeats the code (b) closes the screen (c) sends back a value (d) deletes the app
11. 11.👆 What kind of event is this: a 5-minute alarm ends? (a) a load event (b) a tap event (c) a text event (d) a timer event
12. 12.🔢 In a sign-up flow, which comes LAST? (a) open the app (b) make a password (c) see the home screen (d) type name and email
13. 13.💡 After a survey, which need should version 1 solve? (a) the most common need (b) the rarest need (c) a random need (d) the newest trend
14. 14.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) confetti effects (b) check the answer (c) background music (d) an avatar shop
15. 15.🔁 What number does this code show?
    let steps = [20, 14, 5];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
16. 16.🎯 Why learn about users before you build? (a) to pick a logo (b) to make it longer (c) to build what they need (d) to slow it down
17. 17.Which of these is true of a menu button? (a) undoes one move (b) sits at the bottom (c) shows 3 to 5 icons (d) opens a list of pages
18. 18.🧭 Tapping a tab usually takes you to ___. (a) the last app used (b) a random page (c) that tab’s main screen (d) the phone settings
19. 19.💡 Does an app idea like a page of random dots solve a real problem? (a) No (b) Yes
20. 20.🎨 Is this about UI or UX: the screen layout? (a) UX (b) UI
21. 21.🧪 What is the actual result of a test? (a) what we hope for (b) the test’s number (c) the app’s name (d) what the app really does
22. 22.🔍 Which is the odd one out? (a) colour as the only clue (b) captions on videos (c) big touch targets (d) text that can grow
23. 23.🖼️ In this wireframe (top to bottom), what is right below the menu icon?
    [ Save button ]
    [ search box ]
    [ menu icon ]
    [ top bar ]
    [ tab bar ]
    [ Add button ] (a) top bar (b) Save button (c) tab bar (d) Add button
24. 24.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let points = 41; // start at 41
    line 2: points = points * 2; // double it
    line 3: points = points * 3; // double it
    line 4: points = points * 2; // double it
    line 5: show(points); // show it
25. 25.♿ What does a screen reader do? (a) plays music (b) reads the screen aloud (c) makes text tiny (d) takes photos
26. 26.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Quiz tab
    2. open “Edit photo”
    3. tap Back
    How many times must you tap Back to reach the main screen of this tab?
27. 27.🔁 What number does this code show?
    let steps = [10, 3, 1];
    let best = 0;
    for (let i = 0; i < steps.length; i++) {
      if (steps[i] > best) {
        best = steps[i];
      }
    }
    show(best);
28. 28.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Search tab
    2. tap the Search tab
    3. open “Friend list”
    How many times must you tap Back to reach the main screen of this tab?
29. 29.🔍 Which is the odd one out? (a) a result on screen (b) a buzz (vibration) (c) adding up a bill (d) a beep sound
30. 30.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let points = 43; // start at 40
    line 2: points = points + 5; // add 5
    line 3: points = points + 3; // add 3
    line 4: show(points); // show it (a) line 2 (b) line 3 (c) line 1
31. 31.👆 The user taps the button 2 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) ON (b) OFF
32. 32.🔁 What number does this code show?
    let marks = [13, 19, 3, 4];
    let best = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] > best) {
        best = marks[i];
      }
    }
    show(best);
33. 33.♿ Does this help everyone, or make the app harder to use: strong colour contrast? (a) makes it harder (b) helps everyone
34. 34.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(5) + points(0));
35. 35.🔍 Which is the odd one out? (a) a torch (b) an alarm clock (c) a calculator (d) a puzzle with levels
36. 36.♿ A screen has 5 icon buttons. Only 2 of them have a text label for screen readers. How many still need a label?
37. 37.✏️ What is a wireframe? (a) the finished app (b) a charging cable (c) a type of password (d) a simple screen sketch
38. 38.🔀 What does this sign-up rule show?
    let age = 14;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
39. 39.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Body text: 25 px
    Hint: 24 px
    Title: 16 px
    Label: 13 px (a) Title (b) Label (c) Hint (d) Body text
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(8) + fee(12));

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