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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 781 · 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.🧪 What is the ACTUAL result of Test 3?
    🎟️ 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(17) → expected 100
    Test 2: price(14) → expected 100
    Test 3: price(13) → expected 50
  2. 2.🔍 Which is the odd one out? (a) adding up a bill (b) checking a password (c) sorting the scores (d) speaking a command
  3. 3.🔀 What number does this shop app show?
    let total = 480;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  4. 4.Which of these is an output? (a) speaking a command (b) checking a password (c) a pop-up message (d) adding up a bill
  5. 5.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(1) + points(1));
  6. 6.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Sign Up
    [button] Done
    [button] Cancel
    [text box] Subject
    [button] Next
    [slider] Brightness
    [text box] Notes
    [text box] Name
  7. 7.🔐 Is this permission request fair or too much: calling app → contacts? (a) too much (b) fair
  8. 8.💾 What number does this code show?
    let score = 5;
    score = score - 2;
    score = score + 2;
    show(score);
  9. 9.🔢 When you make an app, which comes first: “release it” or “test the app”? (a) release it (b) test the app
  10. 10.🧪 Who else should try an app before release? (a) the app icon (b) nobody (c) only the coder (d) real users
  11. 11.💾 Where should the app save a draft you are typing: on the phone or in the cloud? (a) in the cloud (b) on the phone
  12. 12.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Size → Search
    Design B: Home → Size → Confirm → Search → Pens
  13. 13.🧩 What do we call one full page of an app? (a) a screen (b) a cable (c) a variable (d) a battery
  14. 14.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let points = 41; // start at 40
    line 2: points = points - 1; // take away 1
    line 3: points = points - 5; // take away 5
    line 4: points = points * 2; // double it
    line 5: show(points); // show it     (a) line 4 (b) line 1 (c) line 3 (d) line 2
  15. 15.Which of these is a button? (a) tap to Start (b) today’s step count (c) the log-in page (d) a date picker
  16. 16.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 8 or more right answers.
    function result(right) {
      if (right > 8) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(8) → expected Pass
    Test 2: result(5) → expected Try again
    Test 3: result(9) → expected Pass     (a) Test 1 (b) Test 3 (c) Test 2
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  18. 18.🗒️ When should nice-to-have features be built? (a) never (b) after the must-haves (c) on day one (d) before anything
  19. 19.📊 Survey: which problem bugs you most? How many students voted in all?
    forgetting birthdays: 18 votes
    missing the bus: 17 votes
    forgetting homework: 5 votes
  20. 20.🚀 Which version is newer: 3.1.17 or 3.1.4? (a) 3.1.17 (b) 3.1.4
  21. 21.💡 Which app idea solves this problem: friends argue over who pays? (a) a lost-and-found board (b) a medicine reminder (c) a study-room finder (d) a bill splitter
  22. 22.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
  23. 23.🎯 Why learn about users before you build? (a) to build what they need (b) to pick a logo (c) to make it longer (d) to slow it down
  24. 24.🔢 When you make an app, what comes right after “build the app”? (a) test the app (b) get an idea (c) plan the screens (d) release it
  25. 25.🎨 Is this about UI or UX: whether users get lost? (a) UI (b) UX
  26. 26.Which of these is true of a menu button? (a) sits at the bottom (b) shows 3 to 5 icons (c) hides extra links (d) goes to the last screen
  27. 27.🐞 Finding and fixing bugs is called ___. (a) debugging (b) designing (c) decorating (d) downloading
  28. 28.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ search box ]
    [ top bar ]
    [ list of items ]
    [ menu icon ]     (a) top bar (b) search box (c) menu icon (d) list of items
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Back button: 64 px tall
    Send button: 28 px tall     (a) Back (b) Send (c) Next
  30. 30.💾 Where should the app save the sound on/off setting: on the phone or in the cloud? (a) in the cloud (b) on the phone
  31. 31.💡 Does an app idea like a library due-date alert solve a real problem? (a) No (b) Yes
  32. 32.✏️ Is this true of a wireframe or of a final design: uses the final pictures? (a) a final design (b) a wireframe
  33. 33.🔀 What does this sign-up rule show?
    let age = 8;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Welcome! (b) Ask a parent
  34. 34.🐞 After fixing a bug you should ___. (a) never test (b) release at once (c) delete the test (d) test it again
  35. 35.True or false: a blank grey screen solves no real problem. (a) False (b) True
  36. 36.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 48; // start at 47
    line 2: lives = lives * 2; // double it
    line 3: lives = lives + 4; // add 4
    line 4: lives = lives * 2; // double it
    line 5: show(lives); // show it     (a) line 2 (b) line 1 (c) line 4 (d) line 3
  37. 37.📊 Survey: which problem bugs you most? How many students voted in all?
    missing the bus: 21 votes
    forgetting birthdays: 6 votes
    forgetting homework: 9 votes
  38. 38.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Offers → Pens
    Design B: Home → Address → Results → Confirm → Size → Offers → Menu     (a) Design A (b) Design B
  39. 39.True or false: the search box changes is a tap event. (a) False (b) True
  40. 40.✏️ Do wireframes usually show the final colours? (a) Yes (b) No

Answer key

  1. 50
  2. speaking a command
  3. 480
  4. a pop-up message
  5. 30
  6. 4
  7. fair
  8. 5
  9. test the app
  10. real users
  11. on the phone
  12. 2
  13. a screen
  14. line 1
  15. tap to Start
  16. Test 1
  17. 28
  18. after the must-haves
  19. 40
  20. 3.1.17
  21. a bill splitter
  22. processing
  23. to build what they need
  24. test the app
  25. UX
  26. hides extra links
  27. debugging
  28. menu icon
  29. Send
  30. on the phone
  31. Yes
  32. a final design
  33. Ask a parent
  34. test it again
  35. True
  36. line 1
  37. 36
  38. Design A
  39. False
  40. No

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