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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 72 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.🔐 A torch app asks for your contacts. What should you do? (a) post them online (b) deny it (c) share them all (d) allow it
  2. 2.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  3. 3.🔢 In a sign-up flow, which comes FIRST? (a) enter the code sent (b) type name and email (c) tap “Sign up” (d) open the app
  4. 4.🗒️ When should nice-to-have features be built? (a) after the must-haves (b) on day one (c) never (d) before anything
  5. 5.✏️ Is this true of a wireframe or of a final design: uses plain grey boxes? (a) a final design (b) a wireframe
  6. 6.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 38; // start at 38
    line 2: score = score + 2; // add 2
    line 3: score = score - 6; // take away 3
    line 4: show(score); // show it
  7. 7.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
  8. 8.✏️ A box with a cross in a wireframe usually means ___. (a) delete this (b) a closed app (c) an error (d) a picture goes here
  9. 9.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Item → Shop → Cart → Search
    Design B: Home → Pens → Search → Menu → Shop → Offers → Item
  10. 10.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 46; // start at 43
    line 2: score = score + 2; // add 2
    line 3: score = score + 5; // add 5
    line 4: show(score); // show it     (a) line 3 (b) line 1 (c) line 2
  11. 11.Which of these requests is fair? (a) quiz app → microphone (b) timer → your photos (c) torch → contacts (d) map app → location
  12. 12.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Match report”
    2. tap the Feed tab
    3. open “Badges”
    4. tap the Settings tab
    How many times must you tap Back to reach the main screen of this tab?
  13. 13.🚀 Your app is at version 2.3.2. The next release is a big redesign that changes how the app works. What is its version number? (a) 2.4.2 (b) 2.4.0 (c) 3.0.0 (d) 2.3.3
  14. 14.🔀 Why plan the user flow before building? (a) to hide the buttons (b) to add more taps (c) to skip testing (d) so each step is clear
  15. 15.🔁 What number does this code show?
    let scores = [20, 9, 7, 11, 10];
    let total = 0;
    for (let i = 0; i < scores.length; i++) {
      total = total + scores[i];
    }
    show(total);
  16. 16.True or false: a website has a home-screen icon. (a) True (b) False
  17. 17.🎯 Is this a user need or a feature: a reminder alarm? (a) a user need (b) a feature
  18. 18.🧭 Which part of navigation sits at the bottom? (a) a tab bar (b) the back button (c) a menu button
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Back button: 56 px tall
    Save button: 52 px tall
  20. 20.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ Save button ]
    [ big picture ]
    [ Add button ]
    [ list of items ]
    [ title text ]     (a) Save button (b) list of items (c) Add button (d) title text
  21. 21.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Video”
    2. tap the Search tab
    3. open “Map”
    How many times must you tap Back to reach the main screen of this tab?
  22. 22.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) show the balance (b) add money received (c) add money spent (d) export to a file
  23. 23.Which of these app ideas solves a real problem? (a) a page of random dots (b) a blank grey screen (c) a free study-room finder (d) a button with no action
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  25. 25.🗒️ Version 1 of a water reminder must be ready in 8 days. How many days are left for extras after the must-haves?
    set a reminder time: 1 days
    log a glass of water: 1 days
    see today’s total: 3 days
  26. 26.🗒️ Version 1 of a bus tracker must be ready in 12 days. How many days are left for extras after the must-haves?
    see where the bus is: 1 days
    show arrival time: 2 days
    pick your bus stop: 4 days
  27. 27.⚙️ What number does this app show?
    let bill = 54; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  28. 28.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Size → Pay → Pens → Shop
    Design B: Home → Results → Pay     (a) Design A (b) Design B
  29. 29.🔀 What does this sign-up rule show?
    let age = 17;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Welcome! (b) Ask a parent
  30. 30.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(65, 6));
  31. 31.🚀 Your app is at version 4.11.2. The next release is a big redesign that changes how the app works. What is its version number? (a) 5.0.0 (b) 4.12.0 (c) 4.12.2 (d) 4.11.3
  32. 32.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.🔁 What number does this code show?
    let marks = [15, 11, 4, 1, 1];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
  34. 34.🎨 Is this about UI or UX: the screen layout? (a) UX (b) UI
  35. 35.💡 Which app idea solves this problem: nobody knows whose bag it is? (a) a medicine reminder (b) a study-room finder (c) a homework planner (d) a lost-and-found board
  36. 36.🚀 Which of these versions is the OLDEST?
    3.8.2, 3.14.4, 2.21.6, 3.4.0     (a) 3.4.0 (b) 3.8.2 (c) 2.21.6 (d) 3.14.4
  37. 37.👆 “On tap → do this” links an event to ___. (a) an action (b) a web address (c) a charger (d) a font
  38. 38.🧪 What is the ACTUAL result of Test 3?
    🎟️ 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(6) → expected 50
    Test 2: price(13) → expected 100
    Test 3: price(11) → expected 100
  39. 39.🌐 Which program do you need to open a website? (a) a camera app (b) a web browser (c) a calculator (d) an app store
  40. 40.💡 Does an app idea like a lost-and-found board solve a real problem? (a) Yes (b) No

Answer key

  1. deny it
  2. poor design
  3. open the app
  4. after the must-haves
  5. a wireframe
  6. 34
  7. output
  8. a picture goes here
  9. 4
  10. line 1
  11. map app → location
  12. 0
  13. 3.0.0
  14. so each step is clear
  15. 57
  16. False
  17. a feature
  18. a tab bar
  19. 3
  20. title text
  21. 1
  22. export to a file
  23. a free study-room finder
  24. 12
  25. 3
  26. 5
  27. 18
  28. Design B
  29. Welcome!
  30. 390
  31. 5.0.0
  32. easy to read
  33. 32
  34. UI
  35. a lost-and-found board
  36. 2.21.6
  37. an action
  38. 100
  39. a web browser
  40. Yes

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