App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 19 · 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 number does this code show?
   let scores = [20, 8, 3, 2, 10];
   let total = 0;
   for (let i = 0; i < scores.length; i++) {
     total = total + scores[i];
   }
   show(total);
2. 2.🎯 What is the best first step to learn what users need? (a) write the code (b) pick the colours (c) guess on your own (d) ask and watch users
3. 3.🧰 What number does this code show?
   function points(stars) {
     return stars * 10 + 5;
   }
   show(points(4) + points(0));
4. 4.👥 A school app has 45 students, 275 teachers and 130 parents as users. How many users does it have in all?
5. 5.💡 Does an app idea like a library due-date alert solve a real problem? (a) No (b) Yes
6. 6.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
   Title: 20 px
   Hint: 13 px
   Footer: 20 px (a) Footer (b) Title (c) Hint
7. 7.True or false: sorting the scores is an output. (a) False (b) True
8. 8.🧪 One test case fails. Which one?
   🎟️ Rule: a ticket costs 50 for children under 10, and 100 for everyone else.
   function price(age) {
     if (age <= 10) {
       return 50;
     }
     return 100;
   }
   Test 1: price(10) → expected 100
   Test 2: price(6) → expected 50
   Test 3: price(11) → expected 100 (a) Test 2 (b) Test 3 (c) Test 1
9. 9.🔀 What does this sign-up rule show?
   let age = 17;
   if (age >= 13) {
     show("Welcome!");
   } else {
     show("Ask a parent");
   } (a) Ask a parent (b) Welcome!
10. 10.Which of these makes the app harder to use? (a) fast-flashing lights (b) strong colour contrast (c) big touch targets (d) labels on every icon
11. 11.🔀 What number does this shop app show?
    let total = 770;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
12. 12.🔍 Which is the odd one out? (a) adding up a bill (b) a result on screen (c) a pop-up message (d) a beep sound
13. 13.🔍 Which is the odd one out? (a) icons with no labels (b) captions on videos (c) tiny tap areas (d) sudden loud sounds
14. 14.🔁 What is the LAST line this code shows?
    let names = ["Aman", "Zoya", "Arjun"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Aman (b) Hi, Arjun (c) Hi, Zoya
15. 15.Which of these is processing? (a) tapping a button (b) working out a tip (c) typing your age (d) a result on screen
16. 16.💾 What number does this code show?
    let notes = ["Music", "Hindi"];
    notes.push("Art");
    show(notes.length);
17. 17.🛠️ At which stage do you spot a problem to solve? (a) the build stage (b) the release stage (c) the plan stage (d) the idea stage
18. 18.✏️ Is this true of a wireframe or of a final design: shows where things go? (a) a final design (b) a wireframe
19. 19.🧭 What does the back button usually do? (a) goes to the last screen (b) closes all apps (c) deletes the page (d) opens settings
20. 20.🔢 After an app is released, which comes first: “release an update” or “fix and improve”? (a) release an update (b) fix and improve
21. 21.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) input (c) output
22. 22.🔀 What number does this shop app show?
    let total = 410;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
23. 23.👥 A cricket club app has 20 players, 25 coaches and 180 fans as users. How many users does it have in all?
24. 24.🔍 Which is the odd one out? (a) a beep sound (b) a pop-up message (c) tapping a button (d) a result on screen
25. 25.🎯 Is this a user need or a feature: “I forget my homework”? (a) a feature (b) a user need
26. 26.True or false: your friends list is data. (a) True (b) False
27. 27.🧭 Which part of navigation goes to the last screen? (a) a menu button (b) the back button (c) a tab bar
28. 28.🎨 A beautiful app that confuses everyone has ___. (a) perfect UX (b) good UI but poor UX (c) no UI at all (d) good UX but poor UI
29. 29.🔀 What does this battery rule show?
    let battery = 19;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Battery OK (b) Low battery
30. 30.🧩 How many buttons does this app screen have?
    [title] New Note
    [text box] Name
    [slider] Brightness
    [text box] Email
    [text box] Due date
    [button] Help
31. 31.🔀 In a good flow, each screen should lead to ___. (a) a clear next step (b) a dead end (c) a random page (d) the same screen
32. 32.🧩 In an app, what is tap to Save? (a) a button (b) data (c) an input (d) a screen
33. 33.Which of these is a screen? (a) the home page of an app (b) a box to type a name (c) your friends list (d) your high score
34. 34.👆 What kind of event is this: the user presses Save? (a) a timer event (b) a tap event (c) a text event (d) a load event
35. 35.🧩 Which of these is a button on this screen?
    [title] New Note
    [slider] Brightness
    [button] Back
    [switch] Remind me
    [text box] Due date (a) Brightness (b) Due date (c) Back (d) Remind me
36. 36.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 38; // start at 38
    line 2: points = points + 3; // add 3
    line 3: points = points - 4; // take away 4
    line 4: points = points + 4; // add 3
    line 5: show(points); // show it
37. 37.Which of these is an input? (a) a result on screen (b) tapping a button (c) adding up a bill (d) sorting the scores
38. 38.🗒️ A to-do app with no “add a task” feature is ___. (a) a nice extra (b) ready to release (c) well planned (d) missing a must-have
39. 39.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(75, 3));
40. 40.🗒️ When should nice-to-have features be built? (a) on day one (b) never (c) after the must-haves (d) before anything

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