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JavaScript Worksheet: Basics

HTML and CSS lesson 25: JavaScript basics · Set 206 · 40 questions
TalentJR

Code tip (Line by line): let x = 5; makes a variable x holding 5; x = x + 2; changes it to 7. console.log(…) writes in the console; alert(…) shows a pop-up box. Text in quotes + anything = joined text: "5" + 3 → "53".

NameDateTime takenScore ___ / 40
  1. 1.⚡ What does this code show?
    let name = "Riya";
    console.log("Hello, " + name + "!");     (a) Riya (b) Hello, name! (c) name (d) Hello, Riya!
  2. 2.⚡ What does this code show?
    let name = "Kabir";
    console.log("Hello, " + name + "!");     (a) name (b) Kabir (c) Hello, Kabir! (d) Hello, name!
  3. 3.⚡ What number does this code print?
    let books = 11;
    books = books + 16;
    books = books - 5;
    console.log(books);
  4. 4.⚡ Which tag holds JavaScript in a page? (a) <code> (b) <js> (c) <style> (d) <script>
  5. 5.⚡ What number does this code print?
    let a = 36;
    let b = 26;
    console.log(a - b);
  6. 6.⚡ What number does this code print?
    let a = 2;
    let b = 11;
    console.log(a * b);
  7. 7.⚡ What number does this code print?
    let a = 11;
    let b = 26;
    console.log(a + b);
  8. 8.⚡ What number does this code print?
    let a = 2;
    let b = 3;
    console.log(a * b);
  9. 9.⚡ What number does this code print?
    let coins = 15;
    coins = coins + 8;
    coins = coins - 9;
    console.log(coins);
  10. 10.⚡ What does this code show?
    let name = "Kabir";
    console.log("Hi, " + name + "!");     (a) name (b) Kabir (c) Hi, Kabir! (d) Hi, name!
  11. 11.⚡ A JavaScript file usually ends with which extension? (a) .html (b) .css (c) .jpg (d) .js
  12. 12.⚡ What does this code show?
    let name = "Riya";
    console.log("Welcome, " + name + "!");     (a) name (b) Riya (c) Welcome, Riya! (d) Welcome, name!
  13. 13.⚡ Which word makes a new variable? (a) put (b) give (c) make (d) let
  14. 14.⚡ Which JavaScript word writes in the console? (a) let (b) console.log() (c) alert() (d) for
  15. 15.⚡ What number does this code print?
    let score = 12;
    score = score + 16;
    score = score - 14;
    console.log(score);
  16. 16.⚡ Which JavaScript word shows a pop-up box? (a) if (b) for (c) console.log() (d) alert()
  17. 17.⚡ Which JavaScript word runs code when true? (a) for (b) console.log() (c) if (d) let
  18. 18.⚡ Which JavaScript word makes a new variable? (a) console.log() (b) if (c) alert() (d) let
  19. 19.⚡ What does this code show?
    let name = "Meera";
    alert("Hi, " + name + "!");     (a) Hi, Meera! (b) Hi, name! (c) name (d) Meera
  20. 20.⚡ What does this code print? (Look at the quotes!)
    let x = "1";
    let y = 9;
    console.log(x + y);     (a) Error (b) 19 (c) 10
  21. 21.⚡ Where does console.log() show its output? (a) on the title bar (b) on the printer (c) in the address bar (d) in the console
  22. 22.⚡ What number does this code print?
    let a = 5;
    let b = 4;
    console.log(a * b);
  23. 23.⚡ What number does this code print?
    let score = 17;
    score = score + 18;
    score = score - 10;
    console.log(score);
  24. 24.⚡ What does alert() show? (a) a picture (b) a pop-up box (c) a new tab (d) a table
  25. 25.⚡ What does this code show?
    let name = "Riya";
    alert("Well done, " + name + "!");     (a) Well done, name! (b) Riya (c) name (d) Well done, Riya!
  26. 26.⚡ What does JavaScript add to a web page? (a) only colours (b) the page title (c) the domain name (d) actions and changes
  27. 27.⚡ What does this code show?
    let name = "Kabir";
    console.log("Welcome, " + name + "!");     (a) Welcome, Kabir! (b) Welcome, name! (c) name (d) Kabir
  28. 28.⚡ What does this code print? (Look at the quotes!)
    let x = "2";
    let y = 3;
    console.log(x + y);     (a) 5 (b) 23 (c) Error
  29. 29.⚡ What number does this code print?
    let a = 13;
    let b = 29;
    console.log(a + b);
  30. 30.⚡ Which JavaScript word repeats code? (a) alert() (b) for (c) if (d) let
  31. 31.⚡ What number does this code print?
    let score = 12;
    score = score + 13;
    score = score - 2;
    console.log(score);
  32. 32.⚡ What number does this code print?
    let a = 9;
    let b = 3;
    console.log(a * b);
  33. 33.⚡ What number does this code print?
    let a = 22;
    let b = 7;
    console.log(a - b);
  34. 34.⚡ What does this code print? (Look at the quotes!)
    let x = "3";
    let y = 4;
    console.log(x + y);     (a) 7 (b) Error (c) 34
  35. 35.⚡ What does this code show?
    let name = "Aman";
    alert("Hi, " + name + "!");     (a) Hi, name! (b) name (c) Hi, Aman! (d) Aman
  36. 36.⚡ What does this code show?
    let name = "Meera";
    alert("Welcome, " + name + "!");     (a) Welcome, name! (b) name (c) Meera (d) Welcome, Meera!
  37. 37.⚡ What number does this code print?
    let a = 26;
    let b = 38;
    console.log(a + b);
  38. 38.⚡ What number does this code print?
    let marks = 8;
    marks = marks + 11;
    marks = marks - 17;
    console.log(marks);
  39. 39.⚡ What number does this code print?
    let a = 56;
    let b = 34;
    console.log(a - b);
  40. 40.⚡ What does this code show?
    let name = "Riya";
    alert("Hello, " + name + "!");     (a) Hello, name! (b) name (c) Hello, Riya! (d) Riya

Answer key

  1. Hello, Riya!
  2. Hello, Kabir!
  3. 22
  4. <script>
  5. 10
  6. 22
  7. 37
  8. 6
  9. 14
  10. Hi, Kabir!
  11. .js
  12. Welcome, Riya!
  13. let
  14. console.log()
  15. 14
  16. alert()
  17. if
  18. let
  19. Hi, Meera!
  20. 19
  21. in the console
  22. 20
  23. 25
  24. a pop-up box
  25. Well done, Riya!
  26. actions and changes
  27. Welcome, Kabir!
  28. 23
  29. 42
  30. for
  31. 23
  32. 27
  33. 15
  34. 34
  35. Hi, Aman!
  36. Welcome, Meera!
  37. 64
  38. 2
  39. 22
  40. Hello, Riya!

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