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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 997 · 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 4 days, builds for 8 days, tests for 1 days and releases on 1 more day. How many days does the whole project take?
  2. 2.🧩 How many buttons does this app screen have?
    [title] Edit Profile
    [text box] Name
    [button] Save
    [text box] Age
  3. 3.💾 What is a variable? (a) a named box for a value (b) a picture (c) a type of screen (d) a phone setting
  4. 4.Which of these is true of a website? (a) comes from an app store (b) is installed on a phone (c) has a home-screen icon (d) needs no installing
  5. 5.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(21));
  6. 6.🔀 What number does this shop app show?
    let total = 260;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  7. 7.🧰 What does this code show?
    function greet(name) {
      return "Hello, " + name + "!";
    }
    show(greet("Meera"));     (a) Hello, Meera! (b) Hello, name! (c) Meera (d) greet
  8. 8.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 31; // start at 31
    line 2: lives = lives - 2; // add 2
    line 3: lives = lives + 2; // add 2
    line 4: lives = lives - 5; // take away 5
    line 5: show(lives); // show it     (a) line 1 (b) line 3 (c) line 4 (d) line 2
  9. 9.🖼️ In this wireframe (top to bottom), what is right above the menu icon?
    [ tab bar ]
    [ top bar ]
    [ menu icon ]
    [ list of items ]     (a) list of items (b) top bar (c) tab bar
  10. 10.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) output (c) input
  11. 11.🔢 In a sign-up flow, which comes FIRST? (a) type name and email (b) see the home screen (c) enter the code sent (d) open the app
  12. 12.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) set a due date (b) see tasks by day (c) add a homework task (d) earn stickers
  13. 13.🔍 Which is the odd one out? (a) speaking a command (b) adding up a bill (c) typing your age (d) taking a photo
  14. 14.👆 The user taps the button 1 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
  15. 15.🖼️ In this wireframe (top to bottom), what is right below the search box?
    [ tab bar ]
    [ list of items ]
    [ search box ]
    [ Add button ]
    [ top bar ]     (a) top bar (b) list of items (c) Add button (d) tab bar
  16. 16.📊 Survey: which problem bugs you most? How many more votes did “no quiet study place” get than “losing water bottles”?
    missing the bus: 5 votes
    no quiet study place: 9 votes
    losing water bottles: 7 votes
  17. 17.🔍 Which is the odd one out? (a) spot a problem to solve (b) list what users need (c) sketch the screens (d) talk to possible users
  18. 18.True or false: chat messages to friends fits saving on the phone. (a) False (b) True
  19. 19.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Menu: 23 px
    Caption: 13 px
    Body text: 22 px
  20. 20.🔀 What does this sign-up rule show?
    let age = 14;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Welcome! (b) Ask a parent
  21. 21.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  22. 22.True or false: the user presses Save is a text event. (a) False (b) True
  23. 23.✏️ Is this true of a wireframe or of a final design: uses plain grey boxes? (a) a wireframe (b) a final design
  24. 24.🎨 Who should you test the UX with? (a) the app icon (b) real users (c) only yourself (d) nobody
  25. 25.🧩 Scores, notes and settings that an app keeps are called ___. (a) buttons (b) tabs (c) screens (d) data
  26. 26.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let stars = 46; // start at 46
    line 2: stars = stars - 4; // take away 2
    line 3: stars = stars - 1; // take away 1
    line 4: stars = stars + 6; // add 6
    line 5: show(stars); // show it     (a) line 2 (b) line 1 (c) line 3 (d) line 4
  27. 27.👥 A library app has 100 readers, 290 librarians and 105 volunteers as users. How many more librarians than volunteers are there?
  28. 28.Which of these is a user need? (a) a search bar (b) “I keep missing the bus” (c) a share button (d) a dark mode switch
  29. 29.📊 Survey: which problem bugs you most? How many students voted in all?
    no quiet study place: 19 votes
    wasting pocket money: 12 votes
    forgetting homework: 21 votes
  30. 30.💡 An app that tries to do everything at once is usually ___. (a) easy to build (b) finished fast (c) very small (d) hard to use
  31. 31.Which of these is true of a website? (a) has a home-screen icon (b) updates from the store (c) has a web address (d) comes from an app store
  32. 32.🧰 What does this code show?
    function greet(name) {
      return "Hello, " + name + "!";
    }
    show(greet("Riya"));     (a) greet (b) Hello, name! (c) Riya (d) Hello, Riya!
  33. 33.🐞 A comment in code (after //) is for ___. (a) people reading the code (b) the phone screen (c) the battery (d) the app store
  34. 34.🔀 What does this battery rule show?
    let battery = 96;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Low battery (b) Battery OK
  35. 35.💾 Where should the app save photos on two devices: on the phone or in the cloud? (a) on the phone (b) in the cloud
  36. 36.True or false: the theme colours is about UX (the experience). (a) False (b) True
  37. 37.💡 Which app idea solves this problem: the library is always full? (a) a bill splitter (b) a medicine reminder (c) a study-room finder (d) a lost-and-found board
  38. 38.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Map”
    2. open “Match report”
    3. tap Back
    4. open “Help page”
    5. open “Badges”
    How many times must you tap Back to reach the main screen of this tab?
  39. 39.🧩 In an app, what is the game-over page? (a) data (b) a screen (c) a button (d) an input
  40. 40.🐞 Finding and fixing bugs is called ___. (a) downloading (b) decorating (c) designing (d) debugging

Answer key

  1. 14
  2. 1
  3. a named box for a value
  4. needs no installing
  5. 63
  6. 260
  7. Hello, Meera!
  8. line 2
  9. top bar
  10. output
  11. open the app
  12. earn stickers
  13. adding up a bill
  14. ON
  15. Add button
  16. 2
  17. sketch the screens
  18. False
  19. 1
  20. Welcome!
  21. hard to read
  22. False
  23. a wireframe
  24. real users
  25. data
  26. line 2
  27. 185
  28. “I keep missing the bus”
  29. 52
  30. hard to use
  31. has a web address
  32. Hello, Riya!
  33. people reading the code
  34. Battery OK
  35. in the cloud
  36. False
  37. a study-room finder
  38. 3
  39. a screen
  40. debugging

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