App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 987 · 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 is a good first step when an app gives a wrong result? (a) buy a new phone (b) add more colours (c) find where it goes wrong (d) delete the app
2. 2.🖼️ In this wireframe (top to bottom), what is right above the title text?
   [ search box ]
   [ title text ]
   [ filter buttons ]
   [ menu icon ] (a) filter buttons (b) menu icon (c) search box
3. 3.🔢 When you make an app, what comes right after “plan the screens”? (a) test the app (b) build the app (c) release it (d) get an idea
4. 4.True or false: a pocket-money tracker is the best fit for a teen whose money runs out by Friday. (a) False (b) True
5. 5.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.Which of these is a feature? (a) “What should I cook?” (b) “I forget my homework” (c) a search bar (d) “I keep missing the bus”
7. 7.🔁 Why use a loop to show 100 messages? (a) less code to write (b) it hides them (c) it uses more lines (d) it is slower
8. 8.🔢 In a food-order flow, which comes first: “pick a dish” or “open the menu”? (a) open the menu (b) pick a dish
9. 9.Which of these fits saving on the phone? (a) photos on two devices (b) chat messages to friends (c) notes to read offline (d) a class leaderboard
10. 10.👥 A school app has 120 students, 300 teachers and 20 parents as users. Which user group is the biggest? (a) students (b) parents (c) teachers
11. 11.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
12. 12.🔀 In this course’s code, which sign tests “is equal to”? (a) !== (b) => (c) === (d) =
13. 13.🔁 What number does this code show?
    let scores = [76, 79, 22, 41];
    let count = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
14. 14.📊 Survey: which problem bugs you most? How many students voted in all?
    missing the bus: 9 votes
    forgetting homework: 25 votes
    no quiet study place: 3 votes
15. 15.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let coins = 33; // start at 33
    line 2: coins = coins + 5; // add 5
    line 3: coins = coins + 6; // add 3
    line 4: show(coins); // show it
16. 16.🗒️ In MVP, the M stands for ___. (a) music (b) mobile (c) minimum (d) maximum
17. 17.True or false: a library due-date alert solves a real problem. (a) False (b) True
18. 18.🎯 What is the best first step to learn what users need? (a) guess on your own (b) write the code (c) pick the colours (d) ask and watch users
19. 19.🔍 Which is the odd one out? (a) working out a tip (b) a pop-up message (c) adding up a bill (d) checking a password
20. 20.Which of these is a button? (a) a slider for volume (b) a switch for dark mode (c) tap to Save (d) your friends list
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 8; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
22. 22.🚀 Which version is newer: 1.16.1 or 1.6.3? (a) 1.16.1 (b) 1.6.3
23. 23.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Home tab
    2. open “Score card”
    3. tap Back
    Which screen are you on now? (a) Score card (b) Search (c) Home (d) Profile
24. 24.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) show the balance (b) add money received (c) add money spent (d) export to a file
25. 25.👆 What kind of event is this: the user presses Save? (a) a timer event (b) a text event (c) a tap event (d) a load event
26. 26.🧪 What is the ACTUAL result of Test 3?
    🎟️ Rule: a ticket costs 50 for children under 11, and 100 for everyone else.
    function price(age) {
      if (age <= 11) {
        return 50;
      }
      return 100;
    }
    Test 1: price(11) → expected 100
    Test 2: price(15) → expected 100
    Test 3: price(9) → expected 50
27. 27.🔢 When you make an app, which comes LAST? (a) plan the screens (b) release it (c) test the app (d) get an idea
28. 28.♿ A screen has 7 icon buttons. Only 6 of them have a text label for screen readers. How many still need a label?
29. 29.🔁 What number does this code show?
    let runs = [3, 13, 19, 16];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
30. 30.🎯 Which app would help this user most: a parent waiting at the bus stop? (a) a big-text reader (b) a pocket-money tracker (c) a bus tracker (d) a homework planner
31. 31.🔢 In a sign-up flow, what comes right after “enter the code sent”? (a) open the app (b) make a password (c) see the home screen (d) type name and email
32. 32.🔍 Which is the odd one out? (a) a beep sound (b) a result on screen (c) typing your age (d) a buzz (vibration)
33. 33.📊 Survey: which problem bugs you most? How many students voted in all?
    missing the bus: 6 votes
    losing water bottles: 20 votes
    no quiet study place: 7 votes
34. 34.👥 A library app has 20 readers, 145 librarians and 60 volunteers as users. Which user group is the biggest? (a) readers (b) volunteers (c) librarians
35. 35.🔢 In a photo-post flow, what comes right after “add a filter”? (a) post the photo (b) open the camera screen (c) take the photo (d) write a caption
36. 36.🔀 What does this sign-up rule show?
    let age = 16;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 330; // 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 3 (b) line 4 (c) line 2 (d) line 1
38. 38.🔀 What does this sign-up rule show?
    let age = 9;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
39. 39.🔢 In a sign-up flow, which comes first: “see the home screen” or “enter the code sent”? (a) see the home screen (b) enter the code sent
40. 40.👆 The user types Kabir 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, Kabir! (d) Kabir

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