← App development final test lesson New set →

App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 742 · 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.🧪 One test case fails. Which one?
    🚚 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(950) → expected 0
    Test 3: delivery(600) → expected 40     (a) Test 2 (b) Test 3 (c) Test 1
  2. 2.🧩 How many buttons does this app screen have?
    [title] New Note
    [text box] Email
    [text box] Age
    [button] Next
    [text box] Subject
    [switch] Sound
  3. 3.🖼️ In this wireframe (top to bottom), what is right below the menu icon?
    [ menu icon ]
    [ Save button ]
    [ filter buttons ]
    [ big picture ]     (a) filter buttons (b) Save button (c) big picture
  4. 4.True or false: a slider for volume is a screen. (a) True (b) False
  5. 5.Which of these is true of a website? (a) is installed on a phone (b) has a home-screen icon (c) updates from the store (d) opens from a link
  6. 6.🧪 What is the actual result of a test? (a) the app’s name (b) the test’s number (c) what we hope for (d) what the app really does
  7. 7.🔢 After an app is released, which comes first: “fix and improve” or “read user reviews”? (a) read user reviews (b) fix and improve
  8. 8.🔁 What number does this code show?
    let runs = [14, 19, 10, 20];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
  9. 9.🔍 Which is the odd one out? (a) a flashcard trainer (b) an alarm clock (c) a calculator (d) a torch
  10. 10.🔀 What does >= mean? (a) less than (b) not equal (c) smaller or equal (d) greater than or equal
  11. 11.🔁 What number does this code show?
    let runs = [10, 3, 4, 15, 4];
    let best = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] > best) {
        best = runs[i];
      }
    }
    show(best);
  12. 12.🗒️ What is a must-have feature? (a) a colour theme (b) a sound effect (c) a nice extra (d) one the app cannot skip
  13. 13.🔢 In a quiz-app flow, which comes first: “read a question” or “tap “Start quiz””? (a) read a question (b) tap “Start quiz”
  14. 14.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) add money received (b) pie-chart colours (c) export to a file (d) savings stickers
  15. 15.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Home tab
    2. open “Match report”
    3. tap the Search tab
    How many times must you tap Back to reach the main screen of this tab?
  16. 16.📱 Which one updates from the store: an app or a website? (a) a website (b) an app
  17. 17.👆 The user taps the button 5 times. What does the label show now?
    let on = false;
    button.onTap = function () {
      on = !on;
      if (on) {
        label.text = "ON";
      } else {
        label.text = "OFF";
      }
    };     (a) ON (b) OFF
  18. 18.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.🔍 Which is the odd one out? (a) the theme colours (b) the font size (c) the screen layout (d) how easy sign-up is
  20. 20.🧩 In an app, what is the home page of an app? (a) a screen (b) an input (c) a button (d) data
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  22. 22.True or false: a class leaderboard fits saving in the cloud. (a) False (b) True
  23. 23.True or false: a racing challenge is a game. (a) False (b) True
  24. 24.🔀 Which badge does this quiz app show?
    let marks = 28;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Gold (b) Bronze (c) Silver
  25. 25.🔀 Which badge does this quiz app show?
    let marks = 92;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Gold (b) Silver (c) Bronze
  26. 26.🎨 UX stands for user ___. (a) express (b) example (c) extra (d) experience
  27. 27.🎨 Is this about UI or UX: how easy sign-up is? (a) UI (b) UX
  28. 28.📊 Survey: which problem bugs you most? How many more votes did “missing the bus” get than “losing water bottles”?
    forgetting homework: 19 votes
    missing the bus: 17 votes
    losing water bottles: 6 votes
  29. 29.True or false: a page of random dots solves no real problem. (a) True (b) False
  30. 30.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 5 or more right answers.
    function result(right) {
      if (right > 5) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(6) → expected Pass
    Test 2: result(5) → expected Pass
    Test 3: result(4) → expected Try again     (a) Test 3 (b) Test 2 (c) Test 1
  31. 31.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Body text: 11 px
    Menu: 25 px
    Caption: 16 px     (a) Caption (b) Menu (c) Body text
  32. 32.🔀 What does this sign-up rule show?
    let age = 9;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Ask a parent (b) Welcome!
  33. 33.Which of these is about UI (the look)? (a) how fast a task is done (b) the button colours (c) how users feel after (d) how many taps it takes
  34. 34.💡 Which app idea solves this problem: pupils forget due dates? (a) a bill splitter (b) a homework planner (c) a lost-and-found board (d) a study-room finder
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Next button: 56 px tall
    Start button: 64 px tall     (a) Start (b) Back (c) Next
  36. 36.🔁 What number does this code show?
    let marks = [7, 13, 14, 14, 4];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
  37. 37.🎯 What is the best first step to learn what users need? (a) guess on your own (b) pick the colours (c) write the code (d) ask and watch users
  38. 38.🗒️ Version 1 of a pocket-money tracker must be ready in 9 days. How many days are left for extras after the must-haves?
    add money received: 3 days
    add money spent: 4 days
    show the balance: 2 days
  39. 39.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 32; // start at 31
    line 2: coins = coins * 2; // double it
    line 3: coins = coins + 3; // add 3
    line 4: show(coins); // show it
  40. 40.🗒️ The first small, working version of an app is often called an ___. (a) URL (b) CPU (c) MVP (d) FAQ

Answer key

  1. Test 1
  2. 1
  3. Save button
  4. False
  5. opens from a link
  6. what the app really does
  7. read user reviews
  8. 63
  9. a flashcard trainer
  10. greater than or equal
  11. 15
  12. one the app cannot skip
  13. tap “Start quiz”
  14. add money received
  15. 0
  16. an app
  17. ON
  18. hard to read
  19. how easy sign-up is
  20. a screen
  21. 28
  22. True
  23. True
  24. Bronze
  25. Gold
  26. experience
  27. UX
  28. 11
  29. True
  30. Test 2
  31. Body text
  32. Ask a parent
  33. the button colours
  34. a homework planner
  35. Back
  36. 52
  37. ask and watch users
  38. 0
  39. 67
  40. MVP

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students