App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 792 · 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.♿ A screen has 6 icon buttons. Only 4 of them have a text label for screen readers. How many still need a label?
2. 2.Which of these is data? (a) a date picker (b) your saved notes (c) a slider for volume (d) the settings page
3. 3.💡 Which app idea solves this problem: the library is always full? (a) a homework planner (b) a bill splitter (c) a medicine reminder (d) a study-room finder
4. 4.⚙️ What number does this app show?
   let bill = 268; // typed by the user
   let friends = 4; // typed by the user
   let share = bill / friends;
   show(share);
5. 5.🧪 How many of these test cases pass?
   🚚 Rule: delivery is free (0) when the order is 300 or more; otherwise it costs 40.
   function delivery(total) {
     if (total > 300) {
       return 0;
     }
     return 40;
   }
   Test 1: delivery(350) → expected 0
   Test 2: delivery(150) → expected 40
   Test 3: delivery(400) → expected 0
6. 6.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
   Title: 15 px
   Caption: 20 px
   Label: 13 px
   Menu: 12 px
   Footer: 12 px
7. 7.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 35; // typed by the user
   line 2: let qty = 5; // typed by the user
   line 3: let total = price * qty;
   line 4: show(total); (a) line 2 (b) line 3 (c) line 1 (d) line 4
8. 8.True or false: a box to type a name is a screen. (a) False (b) True
9. 9.🗒️ Version 1 of a quiz app must be ready in 17 days. How many days are left for extras after the must-haves?
   show a question: 3 days
   check the answer: 4 days
   show the score: 5 days
10. 10.🖼️ How many parts (boxes) does this wireframe have?
    [ search box ]
    [ title text ]
    [ menu icon ]
    [ Save button ]
    [ big picture ]
11. 11.🧪 How many of these test cases pass?
    🎟️ 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(14) → expected 100
    Test 2: price(9) → expected 50
    Test 3: price(15) → expected 100
12. 12.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let points = 44; // start at 42
    line 2: points = points * 2; // double it
    line 3: points = points + 2; // add 2
    line 4: points = points + 6; // add 6
    line 5: show(points); // show it
13. 13.🔁 A loop over a list of 5 items runs its body how many times? (a) 1 (b) 4 (c) 6 (d) 5
14. 14.🧩 What does a button do when you tap it? (a) shows the time (b) starts an action (c) saves the battery (d) changes the phone
15. 15.🔐 Is this permission request fair or too much: quiz app → microphone? (a) too much (b) fair
16. 16.⚙️ What number does this app show?
    let km = 5; // typed by the user
    let metres = km * 1000;
    show(metres);
17. 17.🔍 Which is the odd one out? (a) labels on every icon (b) colour as the only clue (c) icons with no labels (d) tiny tap areas
18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🧰 How do you run (call) a function called greet? (a) greet() (b) greet[] (c) #greet (d) run greet
20. 20.True or false: the search box changes is a tap event. (a) False (b) True
21. 21.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.♿ Does this help everyone, or make the app harder to use: captions on videos? (a) makes it harder (b) helps everyone
23. 23.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) input (c) processing
24. 24.True or false: your friends list is data. (a) True (b) False
25. 25.Which of these is a feature? (a) “I keep missing the bus” (b) “What should I cook?” (c) “Small text is hard” (d) a reminder alarm
26. 26.🔍 Which is the odd one out? (a) colour as the only clue (b) tiny tap areas (c) sudden loud sounds (d) big touch targets
27. 27.🔢 When you make an app, what comes right after “build the app”? (a) get an idea (b) plan the screens (c) test the app (d) release it
28. 28.🎨 Is this about UI or UX: the font size? (a) UI (b) UX
29. 29.🧰 In function tip(bill), what is bill? (a) a loop (b) a parameter (c) an event (d) a screen
30. 30.🚀 Which version is newer: 2.16.3 or 2.4.2? (a) 2.16.3 (b) 2.4.2
31. 31.🧩 In an app, what is tap to Start? (a) a screen (b) data (c) a button (d) an input
32. 32.🔢 When you make an app, which comes FIRST? (a) release it (b) test the app (c) get an idea (d) plan the screens
33. 33.🔢 After an app is released, which comes first: “fix and improve” or “read user reviews”? (a) fix and improve (b) read user reviews
34. 34.Which of these is true of the back button? (a) switches main sections (b) shows 3 to 5 icons (c) goes to the last screen (d) sits at the bottom
35. 35.True or false: a date picker is an input. (a) False (b) True
36. 36.🎨 Is this about UI or UX: how many taps it takes? (a) UI (b) UX
37. 37.👥 A library app has 30 readers, 140 librarians and 45 volunteers as users. Which user group is the biggest? (a) volunteers (b) readers (c) librarians
38. 38.🗒️ Why keep version 1 small? (a) to confuse users (b) to use up storage (c) to learn from users soon (d) to look bigger
39. 39.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 14, and 100 for everyone else.
    function price(age) {
      if (age < 14) {
        return 50;
      }
      return 100;
    }
    Test 1: price(13) → expected 50
    Test 2: price(15) → expected 100
    Test 3: price(14) → expected 100
40. 40.🔍 Which is the odd one out? (a) how many taps it takes (b) the button colours (c) the icon shapes (d) the font size

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