App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 207 · 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.🔀 What does this PIN rule show?
   let pin = "6563";
   if (pin.length === 4) {
     show("PIN saved");
   } else {
     show("Use 4 digits");
   } (a) Use 4 digits (b) PIN saved
2. 2.🖼️ In this wireframe (top to bottom), what is right below the title text?
   [ top bar ]
   [ Add button ]
   [ title text ]
   [ tab bar ]
   [ menu icon ] (a) Add button (b) tab bar (c) top bar (d) menu icon
3. 3.Which of these is true of a wireframe? (a) shows the real fonts (b) has the real colours (c) shows where things go (d) uses the final pictures
4. 4.✏️ Is this true of a wireframe or of a final design: shows where things go? (a) a final design (b) a wireframe
5. 5.🔍 Which is the odd one out? (a) a word battle (b) a torch (c) a racing challenge (d) a puzzle with levels
6. 6.🔁 What number does this code show?
   let marks = [35, 22, 64, 64];
   let count = 0;
   for (let i = 0; i < marks.length; i++) {
     if (marks[i] >= 50) {
       count = count + 1;
     }
   }
   show(count);
7. 7.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) speaking a command (d) a result on screen
8. 8.✏️ Why draw a wireframe before coding? (a) it runs the app (b) it adds colours (c) changes are quick (d) it saves data
9. 9.Which of these is true of the back button? (a) goes to the last screen (b) shows 3 to 5 icons (c) hides extra links (d) switches main sections
10. 10.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 50; // start at 50
    line 2: lives = lives + 3; // add 3
    line 3: lives = lives * 2; // double it
    line 4: lives = lives + 2; // take away 2
    line 5: show(lives); // show it
11. 11.True or false: an app that just says hi solves a real problem. (a) False (b) True
12. 12.Which of these requests is fair? (a) timer → your photos (b) map app → location (c) torch → contacts (d) calculator → location
13. 13.🔢 In a food-order flow, which comes LAST? (a) pick a dish (b) open the menu (c) track the order (d) pay for the order
14. 14.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) pie-chart colours (b) add money spent (c) export to a file (d) savings stickers
15. 15.True or false: the theme colours is about UX (the experience). (a) False (b) True
16. 16.True or false: a bus tracker is the best fit for a teen whose money runs out by Friday. (a) False (b) True
17. 17.♿ A screen has 8 icon buttons. Only 7 of them have a text label for screen readers. How many still need a label?
18. 18.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 33; // start at 33
    line 2: lives = lives * 2; // double it
    line 3: lives = lives + 2; // double it
    line 4: show(lives); // show it (a) line 2 (b) line 3 (c) line 1
19. 19.📊 Survey: which problem bugs you most? How many students voted in all?
    losing water bottles: 8 votes
    no quiet study place: 23 votes
    forgetting birthdays: 9 votes
20. 20.Which of these is a button? (a) the settings page (b) today’s step count (c) the game-over page (d) tap to go Next
21. 21.🔍 Which is the odd one out? (a) a sleep tracker (b) a racing challenge (c) a water reminder (d) a step counter
22. 22.💾 What number does this code show?
    let notes = ["Maths", "Music", "Science"];
    notes.push("Art");
    notes.push("Hindi");
    show(notes.length);
23. 23.📊 Survey: which problem bugs you most? How many students voted in all?
    losing water bottles: 12 votes
    forgetting birthdays: 21 votes
    forgetting homework: 14 votes
24. 24.🔍 Which is the odd one out? (a) pick the features (b) let friends try it (c) write down the bugs (d) try every button
25. 25.📅 An app team plans for 3 days, builds for 7 days, tests for 3 days and releases on 1 more day. How many more days does building take than testing?
26. 26.True or false: speaking a command is an input. (a) False (b) True
27. 27.⚙️ What number does this app show?
    let price = 25; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
28. 28.🔢 In a quiz-app flow, which comes LAST? (a) see the final score (b) see if it is right (c) tap “Start quiz” (d) pick an answer
29. 29.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on black (d) red on green
30. 30.🧰 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(2) + fee(9));
31. 31.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) input (c) processing
32. 32.🗒️ Why keep version 1 small? (a) to confuse users (b) to look bigger (c) to use up storage (d) to learn from users soon
33. 33.🧩 In an app, what is the game-over page? (a) an input (b) a button (c) data (d) a screen
34. 34.🖼️ How many parts (boxes) does this wireframe have?
    [ tab bar ]
    [ big picture ]
    [ top bar ]
    [ Add button ]
35. 35.🔁 list.length tells you ___. (a) the biggest item (b) the first item (c) how many items it has (d) the last item
36. 36.💡 A good app idea starts with ___. (a) many colours (b) a long name (c) a cool logo (d) a problem to solve
37. 37.🧩 In an app, what is a box to type a name? (a) data (b) a button (c) a screen (d) an input
38. 38.Which of these is a user need? (a) a dark mode switch (b) a reminder alarm (c) a search bar (d) “What should I cook?”
39. 39.💡 Which app idea solves this problem: pupils forget due dates? (a) a study-room finder (b) a homework planner (c) a medicine reminder (d) a bill splitter
40. 40.True or false: an alarm clock is a tool app. (a) False (b) True

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