← App development final test lesson New set →

App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 722 · 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.True or false: a result on screen is an output. (a) True (b) False
  2. 2.🔁 What number does this code show?
    let runs = [15, 94, 98, 57];
    let count = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] >= 70) {
        count = count + 1;
      }
    }
    show(count);
  3. 3.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Lessons tab
    2. open “Edit photo”
    3. tap the Lessons tab
    Which screen are you on now?     (a) Edit photo (b) Lessons (c) Quiz (d) Me
  4. 4.🧪 One test case fails. Which one?
    🚚 Rule: delivery is free (0) when the order is 800 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 800) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(900) → expected 0
    Test 2: delivery(800) → expected 0
    Test 3: delivery(700) → expected 40     (a) Test 1 (b) Test 3 (c) Test 2
  5. 5.True or false: a finger hits Like is a text event. (a) True (b) False
  6. 6.👥 A clinic app has 275 patients, 100 doctors and 160 nurses as users. How many users does it have in all?
  7. 7.🔁 In for (let i = 0; i < 3; i++), which values does i take? (a) 0, 1, 2, 3 (b) 1, 2, 3 (c) 0, 1, 2 (d) 3
  8. 8.🧭 Why should every screen show where you are? (a) to hide the menu (b) to look busy (c) so users do not get lost (d) to use more battery
  9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  10. 10.⚙️ What number does this app show?
    let bill = 88; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
  11. 11.🔢 In a quiz-app flow, which comes FIRST? (a) see if it is right (b) pick an answer (c) tap “Start quiz” (d) read a question
  12. 12.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) log a glass of water (b) water animations (c) custom alert sounds (d) share your streak
  13. 13.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) set a due date (b) pick a theme colour (c) add a homework task (d) see tasks by day
  14. 14.True or false: a water reminder is a health app. (a) False (b) True
  15. 15.📱 Which one has a web address: an app or a website? (a) an app (b) a website
  16. 16.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 33; // start at 31
    line 2: points = points * 2; // double it
    line 3: points = points + 2; // add 2
    line 4: show(points); // show it
  17. 17.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 6 or more right answers.
    function result(right) {
      if (right > 6) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(6) → expected Pass
    Test 2: result(5) → expected Try again
    Test 3: result(7) → expected Pass     (a) Test 1 (b) Test 3 (c) Test 2
  18. 18.Which of these is true of a menu button? (a) opens a list of pages (b) goes to the last screen (c) shows 3 to 5 icons (d) sits at the bottom
  19. 19.Which of these is data? (a) a box to type a name (b) the settings page (c) your high score (d) the home page of an app
  20. 20.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Pay → Cart
    Design B: Home → Pens → Address → Results
  21. 21.Which of these is true of a final design? (a) has no real colours (b) shows where things go (c) uses plain grey boxes (d) looks like the real app
  22. 22.🔁 What number does this code show?
    let runs = [70, 50, 81, 70];
    let count = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Next button: 64 px tall
    Cancel button: 52 px tall
  24. 24.🔀 In a good flow, each screen should lead to ___. (a) a random page (b) the same screen (c) a dead end (d) a clear next step
  25. 25.👥 A school app has 20 students, 230 teachers and 35 parents as users. How many users does it have in all?
  26. 26.🔍 Which is the odd one out? (a) a sleep tracker (b) a racing challenge (c) a step counter (d) a water reminder
  27. 27.💾 What is a variable? (a) a type of screen (b) a named box for a value (c) a picture (d) a phone setting
  28. 28.🧪 How many of these test cases pass?
    📝 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(5) → expected Pass
    Test 2: result(7) → expected Pass
    Test 3: result(2) → expected Try again
  29. 29.Which of these is an input? (a) adding up a bill (b) working out a tip (c) a pop-up message (d) typing your age
  30. 30.🗒️ What is a must-have feature? (a) a colour theme (b) one the app cannot skip (c) a nice extra (d) a sound effect
  31. 31.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(45, 6));
  32. 32.📊 Survey: which problem bugs you most? How many more votes did “forgetting homework” get than “forgetting birthdays”?
    missing the bus: 5 votes
    forgetting birthdays: 17 votes
    forgetting homework: 25 votes
  33. 33.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 60;
    }
    show(fee(8) + fee(2));
  34. 34.👆 What kind of event is this: a 5-minute alarm ends? (a) a timer event (b) a tap event (c) a load event (d) a text event
  35. 35.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  36. 36.🐞 What is a bug? (a) a fast phone (b) a mistake in the code (c) a new feature (d) a nice icon
  37. 37.True or false: a big-text reader is the best fit for a child saving up for a cycle. (a) False (b) True
  38. 38.True or false: an app is installed on a phone. (a) True (b) False
  39. 39.🔁 What is the LAST line this code shows?
    let names = ["Zoya", "Meera", "Kabir", "Riya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Meera (b) Hi, Riya (c) Hi, Zoya (d) Hi, Kabir
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 64 px tall
    Next button: 32 px tall     (a) Save (b) Start (c) Next

Answer key

  1. True
  2. 2
  3. Lessons
  4. Test 2
  5. False
  6. 535
  7. 0, 1, 2
  8. so users do not get lost
  9. poor design
  10. 44
  11. tap “Start quiz”
  12. log a glass of water
  13. pick a theme colour
  14. True
  15. a website
  16. 64
  17. Test 1
  18. opens a list of pages
  19. your high score
  20. 2
  21. looks like the real app
  22. 3
  23. 2
  24. a clear next step
  25. 285
  26. a racing challenge
  27. a named box for a value
  28. 2
  29. typing your age
  30. one the app cannot skip
  31. 270
  32. 8
  33. 60
  34. a timer event
  35. easy to read
  36. a mistake in the code
  37. False
  38. True
  39. Hi, Riya
  40. Next

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