App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 202 · 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 app would help this user most: a teen learning to make snacks? (a) a big-text reader (b) a bus tracker (c) a recipe finder (d) a homework planner
2. 2.👆 The user taps the button 1 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
3. 3.✏️ Is this true of a wireframe or of a final design: shows the real fonts? (a) a final design (b) a wireframe
4. 4.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
   line 1: let points = 50; // start at 48
   line 2: points = points - 3; // take away 3
   line 3: points = points * 2; // double it
   line 4: points = points * 2; // double it
   line 5: show(points); // show it
5. 5.🔍 Which is the odd one out? (a) share the download link (b) write the store text (c) connect the data (d) put it on an app store
6. 6.🔀 What does this sign-up rule show?
   let age = 11;
   if (age >= 13) {
     show("Welcome!");
   } else {
     show("Ask a parent");
   } (a) Welcome! (b) Ask a parent
7. 7.True or false: a wireframe shows the real fonts. (a) True (b) False
8. 8.Which of these is true of a wireframe? (a) uses the final pictures (b) shows the real fonts (c) looks like the real app (d) shows where things go
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let bill = 212; // typed by the user
   line 2: let friends = 4; // typed by the user
   line 3: let share = bill / friends;
   line 4: show(share); (a) line 1 (b) line 2 (c) line 4 (d) line 3
10. 10.True or false: the screen first opens is a text event. (a) False (b) True
11. 11.🔀 What does >= mean? (a) not equal (b) less than (c) smaller or equal (d) greater than or equal
12. 12.🚀 Which of these versions is the OLDEST?
    3.17.0, 3.8.9, 3.15.1, 2.22.6 (a) 2.22.6 (b) 3.8.9 (c) 3.15.1 (d) 3.17.0
13. 13.Which of these happens at the idea stage? (a) put it on an app store (b) spot a problem to solve (c) draw the user flow (d) try every button
14. 14.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) output (c) processing
15. 15.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Search → Shop → Pens → Cart → Offers
    Design B: Home → Address → Search → Confirm → Menu → Item → Cart
16. 16.👆 The user taps the button 3 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
17. 17.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) a dark mode (b) rate the driver (c) see where the bus is (d) change the bus icon
18. 18.True or false: “captions on videos” makes the app harder to use. (a) False (b) True
19. 19.🧩 In an app, what is tap to Send? (a) data (b) an input (c) a button (d) a screen
20. 20.🔁 What is the LAST line this code shows?
    let names = ["Arjun", "Aman", "Riya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Aman (b) Hi, Arjun (c) Hi, Riya
21. 21.👥 A school app has 155 students, 175 teachers and 220 parents as users. Which user group is the biggest? (a) teachers (b) parents (c) students
22. 22.Which of these is data? (a) tap to Save (b) your friends list (c) a box to type a name (d) the game-over page
23. 23.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Pens → Shop → Cart → Menu → Results
    Design B: Home → Shop → Cart → Results → Address
24. 24.🚀 Which version is newer: 2.8.0 or 2.18.3? (a) 2.18.3 (b) 2.8.0
25. 25.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 36; // start at 36
    line 2: score = score * 2; // double it
    line 3: score = score + 8; // add 6
    line 4: show(score); // show it (a) line 2 (b) line 3 (c) line 1
26. 26.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(17));
27. 27.👆 The user taps the button 3 times. What number does the label show now?
    let points = 9;
    button.onTap = function () {
      points = points + 2;
      label.text = points;
    };
28. 28.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Help page”
    2. open “Score card”
    3. open “Edit photo”
    4. open “Friend list”
    Which screen are you on now? (a) Score card (b) Edit photo (c) Friend list (d) Help page
29. 29.💡 How can you check that people really have the problem? (a) pick a colour (b) copy another app (c) just guess (d) ask possible users
30. 30.🔍 Which is the odd one out? (a) text that can grow (b) labels on every icon (c) big touch targets (d) tiny tap areas
31. 31.True or false: a wireframe has the real colours. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) let friends try it (b) try every button (c) write down the bugs (d) put it on an app store
33. 33.🔐 Which permission does a selfie sticker app really need? (a) contacts (b) the microphone (c) the camera (d) location
34. 34.True or false: a beep sound is an output. (a) True (b) False
35. 35.🔐 A torch app asks for your contacts. What should you do? (a) post them online (b) deny it (c) allow it (d) share them all
36. 36.📊 Survey: which problem bugs you most? How many more votes did “no quiet study place” get than “forgetting homework”?
    no quiet study place: 16 votes
    missing the bus: 4 votes
    forgetting homework: 12 votes
37. 37.🎯 Which app would help this user most: a gamer who forgets to drink? (a) a bus tracker (b) a recipe finder (c) a big-text reader (d) a water reminder
38. 38.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ tab bar ]
    [ top bar ]
    [ search box ]
    [ big picture ]
    [ filter buttons ]
    [ menu icon ] (a) menu icon (b) big picture (c) tab bar (d) top bar
39. 39.True or false: tap to Save is a screen. (a) True (b) False
40. 40.🔁 What number does this code show?
    let scores = [8, 4, 16, 12];
    let total = 0;
    for (let i = 0; i < scores.length; i++) {
      total = total + scores[i];
    }
    show(total);

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students