App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 468 · 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: how users feel after is about UX (the experience). (a) True (b) False
2. 2.🧪 One test case fails. Which one?
   🚚 Rule: delivery is free (0) when the order is 400 or more; otherwise it costs 40.
   function delivery(total) {
     if (total > 400) {
       return 0;
     }
     return 40;
   }
   Test 1: delivery(400) → expected 0
   Test 2: delivery(650) → expected 0
   Test 3: delivery(350) → expected 40 (a) Test 2 (b) Test 1 (c) Test 3
3. 3.💾 pop() takes off the last item. What does this code show?
   let friends = ["Riya", "Kabir", "Zoya", "Aman"];
   friends.pop();
   show(friends[friends.length - 1]); (a) Zoya (b) Riya (c) Kabir (d) Aman
4. 4.🚀 Which version is newer: 3.3.2 or 3.10.2? (a) 3.10.2 (b) 3.3.2
5. 5.💾 Where should the app save photos on two devices: on the phone or in the cloud? (a) on the phone (b) in the cloud
6. 6.🔀 What does this sign-up rule show?
   let age = 9;
   if (age >= 13) {
     show("Welcome!");
   } else {
     show("Ask a parent");
   } (a) Welcome! (b) Ask a parent
7. 7.✏️ What is a wireframe? (a) a charging cable (b) a type of password (c) the finished app (d) a simple screen sketch
8. 8.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
   Label: 20 px
   Body text: 18 px
   Footer: 14 px
   Menu: 22 px
9. 9.🔢 In a photo-post flow, what comes right after “take the photo”? (a) open the camera screen (b) write a caption (c) add a filter (d) post the photo
10. 10.🔁 What number does this code show?
    let marks = [16, 12, 12, 6, 19];
    let best = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] > best) {
        best = marks[i];
      }
    }
    show(best);
11. 11.🎯 Who are the users of an app? (a) the people who use it (b) the app icons (c) only the testers (d) only the coders
12. 12.Which of these is true of a final design? (a) uses the final pictures (b) is a quick sketch (c) shows where things go (d) has no real colours
13. 13.🖼️ How many parts (boxes) does this wireframe have?
    [ menu icon ]
    [ tab bar ]
    [ top bar ]
    [ Add button ]
    [ filter buttons ]
    [ big picture ]
14. 14.🧰 In function tip(bill), what is bill? (a) a parameter (b) a screen (c) a loop (d) an event
15. 15.Which of these is an output? (a) adding up a bill (b) working out a tip (c) sorting the scores (d) a beep sound
16. 16.Which of these is true of an app? (a) opens from a link (b) opens in a web browser (c) has a home-screen icon (d) needs no installing
17. 17.Which of these happens at the release stage? (a) draw the user flow (b) put it on an app store (c) pick the features (d) connect the data
18. 18.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let coins = 30; // start at 30
    line 2: coins = coins + 2; // double it
    line 3: coins = coins - 4; // take away 4
    line 4: coins = coins * 2; // double it
    line 5: show(coins); // show it (a) line 1 (b) line 4 (c) line 3 (d) line 2
19. 19.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Shop → Pens → Menu
    Design B: Home → Offers → Shop → Cart → Pens (a) Design A (b) Design B
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Back button: 40 px tall
    Next button: 56 px tall
    Start button: 52 px tall
21. 21.📱 Which one is installed on a phone: an app or a website? (a) a website (b) an app
22. 22.🔁 What is the LAST line this code shows?
    let names = ["Arjun", "Riya", "Aman"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Riya (b) Hi, Aman (c) Hi, Arjun
23. 23.♿ What does a screen reader do? (a) reads the screen aloud (b) makes text tiny (c) takes photos (d) plays music
24. 24.👥 A school app has 60 students, 35 teachers and 95 parents as users. How many more students than teachers are there?
25. 25.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Home tab
    2. tap the Search tab
    3. open “Badges”
    4. open “Match report”
    5. tap Back
    How many times must you tap Back to reach the main screen of this tab?
26. 26.♿ Does this help everyone, or make the app harder to use: labels on every icon? (a) makes it harder (b) helps everyone
27. 27.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(3) + points(5));
28. 28.🔁 What is the LAST line this code shows?
    let names = ["Arjun", "Riya", "Aman", "Zoya", "Kabir"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Arjun (b) Hi, Kabir (c) Hi, Aman (d) Hi, Riya
29. 29.👆 What kind of event is this: one second passes? (a) a load event (b) a tap event (c) a timer event (d) a text event
30. 30.Which of these happens at the plan stage? (a) write the store text (b) draw the user flow (c) talk to possible users (d) try every button
31. 31.🎯 A short made-up profile of a typical user is called a ___. (a) pixel (b) persona (c) password (d) protocol
32. 32.True or false: the search box changes is a tap event. (a) False (b) True
33. 33.♿ Why add captions to videos? (a) to slow them down (b) so anyone can follow (c) to add colour (d) to hide the sound
34. 34.True or false: a page of random dots solves a real problem. (a) False (b) True
35. 35.🚀 Which version is newer: 1.1.8 or 1.1.16? (a) 1.1.8 (b) 1.1.16
36. 36.🐞 Finding and fixing bugs is called ___. (a) designing (b) decorating (c) downloading (d) debugging
37. 37.🔍 Which is the odd one out? (a) captions on videos (b) strong colour contrast (c) text that can grow (d) fast-flashing lights
38. 38.🎯 Which app would help this user most: a student who keeps forgetting due dates? (a) a big-text reader (b) a bus tracker (c) a homework planner (d) a recipe finder
39. 39.🧩 How many buttons does this app screen have?
    [title] Order Snacks
    [button] Save
    [slider] Text size
    [text box] Name
    [button] Cancel
    [button] Back
    [text box] Age
40. 40.True or false: the user taps Play is a tap event. (a) False (b) True

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