App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 704 · 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.💡 An app that tries to do everything at once is usually ___. (a) easy to build (b) finished fast (c) very small (d) hard to use
2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🧰 What number does this code show?
   function total(price, qty) {
     return price * qty;
   }
   show(total(90, 4));
4. 4.🔢 In a photo-post flow, which comes first: “take the photo” or “add a filter”? (a) take the photo (b) add a filter
5. 5.🧪 What is the ACTUAL result of Test 2?
   🚚 Rule: delivery is free (0) when the order is 700 or more; otherwise it costs 40.
   function delivery(total) {
     if (total > 700) {
       return 0;
     }
     return 40;
   }
   Test 1: delivery(700) → expected 0
   Test 2: delivery(1000) → expected 0
   Test 3: delivery(500) → expected 40
6. 6.🗒️ A to-do app with no “add a task” feature is ___. (a) a nice extra (b) missing a must-have (c) well planned (d) ready to release
7. 7.🎯 Which app would help this user most: a grandparent with weak eyesight? (a) a homework planner (b) a big-text reader (c) a pocket-money tracker (d) a recipe finder
8. 8.⚙️ What number does this app show?
   let km = 7; // typed by the user
   let metres = km * 1000;
   show(metres);
9. 9.🐞 This code has a bug. What number does it ACTUALLY show?
   line 1: let stars = 37; // start at 37
   line 2: stars = stars - 4; // take away 4
   line 3: stars = stars * 3; // double it
   line 4: show(stars); // show it
10. 10.✏️ Is this true of a wireframe or of a final design: has the real colours? (a) a final design (b) a wireframe
11. 11.🔁 What number does this code show?
    let runs = [7, 12, 14, 9, 10];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // typed by the user
    line 2: let qty = 6; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 2 (b) line 3 (c) line 4 (d) line 1
13. 13.🔍 Which is the odd one out? (a) working out a tip (b) typing your age (c) checking a password (d) sorting the scores
14. 14.💾 What number does this code show?
    let songs = ["Rain", "Monsoon", "Sunrise"];
    songs.push("Kites");
    show(songs.length);
15. 15.🔢 When you make an app, what comes right after “build the app”? (a) plan the screens (b) test the app (c) get an idea (d) release it
16. 16.🔍 Which is the odd one out? (a) a spelling coach (b) a times-table quiz (c) a water reminder (d) a flashcard trainer
17. 17.🔀 What does if / else let an app do? (a) repeat forever (b) save a photo (c) draw a screen (d) pick one of two actions
18. 18.Which of these happens at the plan stage? (a) put it on an app store (b) list what users need (c) sketch the screens (d) connect the data
19. 19.🔀 What does this sign-up rule show?
    let age = 10;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
20. 20.True or false: you write down the bugs at the release stage. (a) True (b) False
21. 21.True or false: a class leaderboard fits saving on the phone. (a) False (b) True
22. 22.💾 What number does this code show?
    let friends = ["Arjun", "Aman"];
    friends.push("Zoya");
    friends.push("Kabir");
    show(friends.length);
23. 23.🧭 Why should every screen show where you are? (a) to look busy (b) so users do not get lost (c) to use more battery (d) to hide the menu
24. 24.🔐 Is this permission request fair or too much: map app → location? (a) too much (b) fair
25. 25.👆 What kind of event is this: the user taps Play? (a) a timer event (b) a text event (c) a load event (d) a tap event
26. 26.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Search → Address → Cart
    Design B: Home → Menu → Pens
27. 27.🔀 What is a user flow? (a) the path through screens (b) a charging cable (c) a colour theme (d) a type of font
28. 28.🔁 What number does this code show?
    let runs = [16, 13, 12];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
29. 29.True or false: “captions on videos” helps everyone use the app. (a) True (b) False
30. 30.👆 What kind of event is this: a countdown hits zero? (a) a load event (b) a text event (c) a timer event (d) a tap event
31. 31.⚙️ What number does this app show?
    let km = 14; // typed by the user
    let metres = km * 1000;
    show(metres);
32. 32.💡 Which is a problem statement? (a) “Make it fast” (b) “Use blue buttons” (c) “Add a logo” (d) “Kids forget homework”
33. 33.🔀 Which badge does this quiz app show?
    let marks = 87;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    } (a) Gold (b) Silver (c) Bronze
34. 34.🔢 In a food-order flow, which comes LAST? (a) add it to the cart (b) open the menu (c) pick a dish (d) track the order
35. 35.🔀 What does >= mean? (a) less than (b) smaller or equal (c) greater than or equal (d) not equal
36. 36.🧰 What does this code show?
    function greet(name) {
      return "Hello, " + name + "!";
    }
    show(greet("Arjun")); (a) Hello, Arjun! (b) Hello, name! (c) greet (d) Arjun
37. 37.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) change the bus icon (b) rate the driver (c) see where the bus is (d) a dark mode
38. 38.🖼️ How many parts (boxes) does this wireframe have?
    [ menu icon ]
    [ search box ]
    [ title text ]
    [ big picture ]
39. 39.🔢 After an app is released, which comes first: “read user reviews” or “fix and improve”? (a) fix and improve (b) read user reviews
40. 40.True or false: “tiny tap areas” helps everyone use the app. (a) True (b) False

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