← App development final test lesson New set →

App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 150 · 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 number does this app show?
    let bill = 390; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
  2. 2.🔢 In a food-order flow, which comes first: “pick a dish” or “track the order”? (a) pick a dish (b) track the order
  3. 3.Which of these is true of the back button? (a) undoes one move (b) shows 3 to 5 icons (c) sits at the bottom (d) switches main sections
  4. 4.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Arjun", "Zoya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Arjun (b) Hi, Zoya (c) Hi, Riya
  5. 5.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let coins = 36; // start at 36
    line 2: coins = coins + 2; // double it
    line 3: coins = coins * 2; // double it
    line 4: show(coins); // show it     (a) line 1 (b) line 3 (c) line 2
  6. 6.👥 A library app has 270 readers, 185 librarians and 80 volunteers as users. Which user group is the biggest? (a) volunteers (b) librarians (c) readers
  7. 7.True or false: a website has a web address. (a) False (b) True
  8. 8.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Help page”
    2. tap the Profile tab
    3. tap the Profile tab
    4. open “Friend list”
    How many times must you tap Back to reach the main screen of this tab?
  9. 9.🔁 A loop over a list of 5 items runs its body how many times? (a) 4 (b) 1 (c) 5 (d) 6
  10. 10.🔀 Which badge does this quiz app show?
    let marks = 77;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Gold (b) Silver (c) Bronze
  11. 11.📊 Survey: which problem bugs you most? How many students voted in all?
    losing water bottles: 5 votes
    wasting pocket money: 14 votes
    forgetting homework: 20 votes
  12. 12.Which of these is true of a final design? (a) shows where things go (b) is a quick sketch (c) has no real colours (d) looks like the real app
  13. 13.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Match report”
    2. tap the Search tab
    3. open “Match report”
    Which screen are you on now?     (a) Search (b) Profile (c) Home (d) Match report
  14. 14.👆 Code that runs when an event happens is called a ___. (a) header (b) hashtag (c) handler (d) headline
  15. 15.📊 Survey: which problem bugs you most? How many more votes did “forgetting homework” get than “missing the bus”?
    forgetting homework: 17 votes
    wasting pocket money: 3 votes
    missing the bus: 7 votes
  16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 50; // typed by the user
    line 2: let friends = 5; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 3 (b) line 2 (c) line 4 (d) line 1
  17. 17.True or false: a website needs no installing. (a) False (b) True
  18. 18.📱 Where do people usually download phone apps from? (a) a charger (b) a web server (c) a printer (d) an app store
  19. 19.Which of these is true of an app? (a) needs no installing (b) opens in a web browser (c) is installed on a phone (d) opens from a link
  20. 20.🔀 What does this PIN rule show?
    let pin = "53911";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    }     (a) Use 4 digits (b) PIN saved
  21. 21.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 43; // start at 41
    line 2: score = score * 2; // double it
    line 3: score = score + 3; // add 3
    line 4: show(score); // show it
  22. 22.🧰 Why write a function? (a) to slow the app (b) to hide errors (c) to reuse code (d) to make code longer
  23. 23.True or false: typing your age is processing. (a) True (b) False
  24. 24.🔁 What number does this code show?
    let marks = [60, 51, 91, 95];
    let count = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] >= 50) {
        count = count + 1;
      }
    }
    show(count);
  25. 25.Which of these helps everyone use the app? (a) tiny tap areas (b) colour as the only clue (c) labels on every icon (d) icons with no labels
  26. 26.✏️ Why draw a wireframe before coding? (a) it saves data (b) it adds colours (c) changes are quick (d) it runs the app
  27. 27.📱 Which one comes from an app store: an app or a website? (a) a website (b) an app
  28. 28.📊 Survey: which problem bugs you most? How many students voted in all?
    missing the bus: 15 votes
    no quiet study place: 20 votes
    forgetting homework: 9 votes
  29. 29.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 13, and 100 for everyone else.
    function price(age) {
      if (age <= 13) {
        return 50;
      }
      return 100;
    }
    Test 1: price(12) → expected 50
    Test 2: price(17) → expected 100
    Test 3: price(19) → expected 100
  30. 30.🔢 In a photo-post flow, which comes LAST? (a) write a caption (b) open the camera screen (c) add a filter (d) post the photo
  31. 31.Which of these is a feature? (a) a dark mode switch (b) “What should I cook?” (c) “I forget my homework” (d) “I keep missing the bus”
  32. 32.🔢 In a quiz-app flow, which comes first: “see if it is right” or “read a question”? (a) see if it is right (b) read a question
  33. 33.True or false: a step counter is a game. (a) True (b) False
  34. 34.True or false: buttons almost touching is good button design. (a) True (b) False
  35. 35.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) custom alert sounds (b) see today’s total (c) share your streak (d) water animations
  36. 36.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    forgetting birthdays: 23 votes
    wasting pocket money: 14 votes
    forgetting homework: 9 votes     (a) forgetting birthdays (b) forgetting homework (c) wasting pocket money
  37. 37.🎯 Which app would help this user most: a child saving up for a cycle? (a) a homework planner (b) a water reminder (c) a bus tracker (d) a pocket-money tracker
  38. 38.📊 Survey: which problem bugs you most? How many students voted in all?
    no quiet study place: 9 votes
    losing water bottles: 25 votes
    forgetting birthdays: 12 votes
  39. 39.🎯 Which app would help this user most: a gamer who forgets to drink? (a) a bus tracker (b) a homework planner (c) a water reminder (d) a recipe finder
  40. 40.🔀 What is a user flow? (a) a colour theme (b) a type of font (c) a charging cable (d) the path through screens

Answer key

  1. 78
  2. pick a dish
  3. undoes one move
  4. Hi, Zoya
  5. line 2
  6. readers
  7. True
  8. 1
  9. 5
  10. Silver
  11. 39
  12. looks like the real app
  13. Match report
  14. handler
  15. 10
  16. line 3
  17. True
  18. an app store
  19. is installed on a phone
  20. Use 4 digits
  21. 89
  22. to reuse code
  23. False
  24. 4
  25. labels on every icon
  26. changes are quick
  27. an app
  28. 44
  29. 3
  30. post the photo
  31. a dark mode switch
  32. read a question
  33. False
  34. False
  35. see today’s total
  36. forgetting birthdays
  37. a pocket-money tracker
  38. 46
  39. a water reminder
  40. the path through screens

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