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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 751 · 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.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pens → Results → Size
    Design B: Home → Cart → Address → Pens → Pay     (a) Design B (b) Design A
  2. 2.🔍 Which is the odd one out? (a) colour as the only clue (b) sudden loud sounds (c) tiny tap areas (d) big touch targets
  3. 3.🗒️ You are planning version 1 of a quiz app. Which feature can WAIT for a later version? (a) an avatar shop (b) show a question (c) check the answer (d) show the score
  4. 4.🔁 What number does this code show?
    let runs = [3, 20, 13];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
  5. 5.🚀 Which of these versions is the NEWEST?
    4.6.0, 4.15.9, 3.26.3, 4.8.0     (a) 4.15.9 (b) 4.6.0 (c) 3.26.3 (d) 4.8.0
  6. 6.👆 An event in an app is ___. (a) a colour theme (b) an app store (c) something that happens (d) a kind of list
  7. 7.🔀 With if / else if / else, how many parts run? (a) two (b) none (c) only one (d) all of them
  8. 8.💾 Which can hold many values in order? (a) a single number (b) a list (c) a button (d) a switch
  9. 9.🧩 In an app, what is the game-over page? (a) a screen (b) data (c) a button (d) an input
  10. 10.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Quiz tab
    2. open “Friend list”
    3. tap the Lessons tab
    Which screen are you on now?     (a) Quiz (b) Lessons (c) Friend list (d) Me
  11. 11.Which of these requests is fair? (a) calling app → contacts (b) timer → your photos (c) quiz app → microphone (d) torch → contacts
  12. 12.🧩 How many buttons does this app screen have?
    [title] Order Snacks
    [slider] Text size
    [button] Save
    [text box] Notes
  13. 13.🗒️ What is a must-have feature? (a) a colour theme (b) a sound effect (c) one the app cannot skip (d) a nice extra
  14. 14.🔐 Is this permission request fair or too much: map app → location? (a) too much (b) fair
  15. 15.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 42; // start at 40
    line 2: points = points - 4; // take away 4
    line 3: points = points * 2; // double it
    line 4: show(points); // show it
  16. 16.🐞 Finding and fixing bugs is called ___. (a) decorating (b) debugging (c) designing (d) downloading
  17. 17.🗒️ Version 1 of a water reminder must be ready in 14 days. How many days are left for extras after the must-haves?
    set a reminder time: 1 days
    log a glass of water: 3 days
    see today’s total: 4 days
  18. 18.📱 Which one has a home-screen icon: an app or a website? (a) an app (b) a website
  19. 19.🧩 In an app, what is the home page of an app? (a) data (b) a screen (c) a button (d) an input
  20. 20.True or false: a guitar tuner needs the camera. (a) True (b) False
  21. 21.🔁 What does a loop do? (a) saves photos (b) deletes code (c) repeats code (d) draws icons
  22. 22.📅 An app team plans for 5 days, builds for 8 days, tests for 1 days and releases on 1 more day. How many days does the whole project take?
  23. 23.True or false: a sleep tracker is a tool app. (a) False (b) True
  24. 24.Which of these app ideas solves no real problem? (a) a medicine reminder (b) a lost-and-found board (c) an app that just says hi (d) a library due-date alert
  25. 25.♿ A screen has 9 icon buttons. Only 5 of them have a text label for screen readers. How many still need a label?
  26. 26.Which of these is true of a wireframe? (a) uses the final pictures (b) has the real colours (c) shows the real fonts (d) uses plain grey boxes
  27. 27.🐞 What is a good first step when an app gives a wrong result? (a) add more colours (b) delete the app (c) buy a new phone (d) find where it goes wrong
  28. 28.🎯 Is this a user need or a feature: “Small text is hard”? (a) a user need (b) a feature
  29. 29.🗒️ A to-do app with no “add a task” feature is ___. (a) well planned (b) ready to release (c) missing a must-have (d) a nice extra
  30. 30.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    missing the bus: 5 votes
    forgetting birthdays: 15 votes
    no quiet study place: 9 votes     (a) no quiet study place (b) missing the bus (c) forgetting birthdays
  31. 31.🔢 After an app is released, which comes first: “test it again” or “read user reviews”? (a) read user reviews (b) test it again
  32. 32.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(37));
  33. 33.✏️ Is this true of a wireframe or of a final design: has the real colours? (a) a wireframe (b) a final design
  34. 34.🖼️ How many parts (boxes) does this wireframe have?
    [ list of items ]
    [ big picture ]
    [ Add button ]
    [ top bar ]
  35. 35.🔀 Which badge does this quiz app show?
    let marks = 48;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Silver (b) Gold (c) Bronze
  36. 36.🔁 What number does this code show?
    let runs = [4, 1, 7];
    let best = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] > best) {
        best = runs[i];
      }
    }
    show(best);
  37. 37.🌐 Which program do you need to open a website? (a) an app store (b) a calculator (c) a camera app (d) a web browser
  38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 95; // typed by the user
    line 2: let qty = 3; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 1 (b) line 3 (c) line 4 (d) line 2
  39. 39.💾 In most code, the first item of a list is at position ___. (a) 2 (b) 1 (c) 10 (d) 0
  40. 40.🧪 What is the ACTUAL result of Test 3?
    🎟️ Rule: a ticket costs 50 for children under 11, and 100 for everyone else.
    function price(age) {
      if (age < 11) {
        return 50;
      }
      return 100;
    }
    Test 1: price(12) → expected 100
    Test 2: price(10) → expected 50
    Test 3: price(11) → expected 100

Answer key

  1. Design A
  2. big touch targets
  3. an avatar shop
  4. 36
  5. 4.15.9
  6. something that happens
  7. only one
  8. a list
  9. a screen
  10. Lessons
  11. calling app → contacts
  12. 1
  13. one the app cannot skip
  14. fair
  15. 72
  16. debugging
  17. 6
  18. an app
  19. a screen
  20. False
  21. repeats code
  22. 15
  23. False
  24. an app that just says hi
  25. 4
  26. uses plain grey boxes
  27. find where it goes wrong
  28. a user need
  29. missing a must-have
  30. forgetting birthdays
  31. read user reviews
  32. 111
  33. a final design
  34. 4
  35. Bronze
  36. 7
  37. a web browser
  38. line 3
  39. 0
  40. 100

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