App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 429 · 40 questions

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.

1. 1.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 52 px tall
   Back button: 24 px tall
   Send button: 48 px tall
   Cancel button: 60 px tall (a) Start (b) Cancel (c) Back (d) Send
2. 2.🛠️ At which stage do you list what users need? (a) the build stage (b) the plan stage (c) the test stage (d) the idea stage
3. 3.👆 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
4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
5. 5.🔀 What number does this shop app show?
   let total = 700;
   if (total > 500) {
     total = total - 50;
   }
   show(total);
6. 6.👥 A clinic app has 20 patients, 205 doctors and 115 nurses as users. How many more nurses than patients are there?
7. 7.📊 Survey: which problem bugs you most? How many students voted in all?
   missing the bus: 12 votes
   wasting pocket money: 20 votes
   no quiet study place: 13 votes
8. 8.👥 A school app has 290 students, 95 teachers and 25 parents as users. How many users does it have in all?
9. 9.Which of these is a user need? (a) a search bar (b) a share button (c) a reminder alarm (d) “Small text is hard”
10. 10.Which of these is true of the back button? (a) switches main sections (b) sits at the bottom (c) undoes one move (d) hides extra links
11. 11.💡 Which app idea solves this problem: pupils forget due dates? (a) a lost-and-found board (b) a study-room finder (c) a homework planner (d) a bill splitter
12. 12.True or false: the search box changes is a tap event. (a) True (b) False
13. 13.🔀 In a good flow, each screen should lead to ___. (a) a random page (b) a dead end (c) a clear next step (d) the same screen
14. 14.Which of these is true of an app? (a) needs no installing (b) has a web address (c) opens from a link (d) has a home-screen icon
15. 15.🧩 In an app, what is today’s step count? (a) a screen (b) a button (c) an input (d) data
16. 16.📱 The word “app” is short for ___. (a) appetite (b) appointment (c) apparatus (d) application
17. 17.True or false: notes to read offline fits saving on the phone. (a) False (b) True
18. 18.🔀 When does the else part run? (a) when the test is true (b) never (c) when the test is false (d) always
19. 19.🔁 What number does this code show?
    let marks = [60, 36, 34, 90, 89];
    let count = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
20. 20.✏️ Is this true of a wireframe or of a final design: is a quick sketch? (a) a final design (b) a wireframe
21. 21.🚀 Which of these versions is the OLDEST?
    1.12.6, 1.9.3, 0.22.4, 1.2.0 (a) 1.2.0 (b) 1.9.3 (c) 1.12.6 (d) 0.22.4
22. 22.True or false: “captions on videos” makes the app harder to use. (a) False (b) True
23. 23.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let stars = 45; // start at 43
    line 2: stars = stars * 2; // double it
    line 3: stars = stars * 2; // double it
    line 4: show(stars); // show it (a) line 3 (b) line 2 (c) line 1
24. 24.Which of these is true of a final design? (a) has no real colours (b) shows the real fonts (c) shows where things go (d) is a quick sketch
25. 25.👆 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
26. 26.🚀 Which version is newer: 1.18.2 or 1.3.1? (a) 1.18.2 (b) 1.3.1
27. 27.🔁 What does a loop do? (a) saves photos (b) draws icons (c) repeats code (d) deletes code
28. 28.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) show the balance (b) add money spent (c) add money received (d) savings stickers
29. 29.🔁 What number does this code show?
    let steps = [6, 17, 3];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
30. 30.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(1) + points(3));
31. 31.True or false: how users feel after is about UI (the look). (a) True (b) False
32. 32.Which of these is an input? (a) taking a photo (b) a buzz (vibration) (c) sorting the scores (d) working out a tip
33. 33.👆 “On tap → do this” links an event to ___. (a) a font (b) a charger (c) a web address (d) an action
34. 34.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) see where the bus is (b) pick your bus stop (c) rate the driver (d) show arrival time
36. 36.🎨 Is this about UI or UX: how fast a task is done? (a) UI (b) UX
37. 37.🚀 A change from version 1.4.2 to 1.4.3 usually means ___. (a) a bug fix (b) a new app (c) a big redesign (d) a new feature
38. 38.🔢 In a sign-up flow, which comes first: “make a password” or “type name and email”? (a) make a password (b) type name and email
39. 39.🔀 What does this sign-up rule show?
    let age = 15;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
40. 40.🔁 What is the LAST line this code shows?
    let names = ["Aman", "Arjun", "Kabir"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Arjun (b) Hi, Kabir (c) Hi, Aman

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