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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 361 · 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.📅 An app team plans for 5 days, builds for 11 days, tests for 1 days and releases on 1 more day. How many days does the whole project take?
  2. 2.👆 What kind of event is this: the user types a letter? (a) a load event (b) a timer event (c) a tap event (d) a text event
  3. 3.🧪 One test case fails. Which one?
    🚚 Rule: delivery is free (0) when the order is 500 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 500) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(650) → expected 0
    Test 2: delivery(500) → expected 0
    Test 3: delivery(300) → expected 40     (a) Test 2 (b) Test 1 (c) Test 3
  4. 4.📊 Survey: which problem bugs you most? How many students voted in all?
    wasting pocket money: 5 votes
    forgetting birthdays: 6 votes
    forgetting homework: 7 votes
  5. 5.Which of these is true of a website? (a) updates from the store (b) has a home-screen icon (c) is installed on a phone (d) needs no installing
  6. 6.True or false: a shared to-do list fits saving on the phone. (a) True (b) False
  7. 7.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) background music (b) confetti effects (c) show a question (d) an avatar shop
  8. 8.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 30;
    }
    show(fee(1) + fee(5));
  9. 9.🧭 Which part of navigation undoes one move? (a) a tab bar (b) the back button (c) a menu button
  10. 10.🧩 Scores, notes and settings that an app keeps are called ___. (a) tabs (b) screens (c) data (d) buttons
  11. 11.True or false: a bill splitter solves a real problem. (a) False (b) True
  12. 12.Which of these is an output? (a) adding up a bill (b) a pop-up message (c) working out a tip (d) checking a password
  13. 13.🧩 In an app, what is tap to go Next? (a) an input (b) data (c) a screen (d) a button
  14. 14.👆 The user taps the button 6 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 2) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  15. 15.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let coins = 42; // start at 42
    line 2: coins = coins * 2; // double it
    line 3: coins = coins + 2; // double it
    line 4: show(coins); // show it
  16. 16.💡 Does an app idea like a lost-and-found board solve a real problem? (a) No (b) Yes
  17. 17.Which of these is processing? (a) tapping a button (b) a pop-up message (c) adding up a bill (d) a buzz (vibration)
  18. 18.🧪 How many of these test cases pass?
    📝 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(13) → expected Pass
    Test 2: result(10) → expected Pass
    Test 3: result(7) → expected Try again
  19. 19.🎯 Is this a user need or a feature: a dark mode switch? (a) a user need (b) a feature
  20. 20.🗂️ What kind of app is a torch? (a) a health app (b) a tool app (c) a game (d) a learning app
  21. 21.True or false: a racing challenge is a learning app. (a) True (b) False
  22. 22.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
  23. 23.🔢 In a photo-post flow, which comes first: “post the photo” or “take the photo”? (a) take the photo (b) post the photo
  24. 24.True or false: the user types a letter is a load event. (a) False (b) True
  25. 25.🔀 What does this PIN rule show?
    let pin = "8633";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    }     (a) PIN saved (b) Use 4 digits
  26. 26.🔢 In a photo-post flow, what comes right after “open the camera screen”? (a) write a caption (b) add a filter (c) take the photo (d) post the photo
  27. 27.🔍 Which is the odd one out? (a) text that can grow (b) fast-flashing lights (c) strong colour contrast (d) labels on every icon
  28. 28.Which of these fits saving in the cloud? (a) a draft you are typing (b) your last game level (c) photos on two devices (d) notes to read offline
  29. 29.Which of these app ideas solves a real problem? (a) a button with no action (b) a blank grey screen (c) an app that just says hi (d) a bill splitter
  30. 30.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pay → Pens → Cart → Search → Address → Size
    Design B: Home → Search → Cart → Pay     (a) Design A (b) Design B
  31. 31.📊 Survey: which problem bugs you most? How many more votes did “losing water bottles” get than “no quiet study place”?
    missing the bus: 10 votes
    losing water bottles: 19 votes
    no quiet study place: 5 votes
  32. 32.True or false: a pocket-money tracker is the best fit for a teen whose money runs out by Friday. (a) True (b) False
  33. 33.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Shop → Cart → Size → Item → Search → Offers
    Design B: Home → Shop → Address → Menu → Results     (a) Design B (b) Design A
  34. 34.🧩 How many buttons does this app screen have?
    [title] Order Snacks
    [slider] Volume
    [button] Start
    [text box] Due date
    [button] Cancel
    [button] Save
  35. 35.👆 An event in an app is ___. (a) a colour theme (b) an app store (c) a kind of list (d) something that happens
  36. 36.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 8, and 100 for everyone else.
    function price(age) {
      if (age < 8) {
        return 50;
      }
      return 100;
    }
    Test 1: price(13) → expected 100
    Test 2: price(6) → expected 50
    Test 3: price(16) → expected 100
  37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 12; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 1 (c) line 3
  38. 38.🛠️ At which stage do you spot a problem to solve? (a) the plan stage (b) the release stage (c) the idea stage (d) the build stage
  39. 39.🧪 What is the ACTUAL result of Test 1?
    🎟️ 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(15) → expected 100
    Test 3: price(12) → expected 100
  40. 40.🧩 Which part lets the user give the app information? (a) a title (b) a logo (c) an input (d) an icon

Answer key

  1. 18
  2. a text event
  3. Test 2
  4. 18
  5. needs no installing
  6. False
  7. show a question
  8. 30
  9. the back button
  10. data
  11. True
  12. a pop-up message
  13. a button
  14. 2
  15. 168
  16. Yes
  17. adding up a bill
  18. 3
  19. a feature
  20. a tool app
  21. False
  22. processing
  23. take the photo
  24. False
  25. PIN saved
  26. take the photo
  27. fast-flashing lights
  28. photos on two devices
  29. a bill splitter
  30. Design B
  31. 14
  32. True
  33. Design B
  34. 3
  35. something that happens
  36. 3
  37. line 2
  38. the idea stage
  39. 50
  40. an input

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