Javascript

Javascript MCQ

• JavaScript Questions 1 to 50
  • 1. What’s the output?
  • 2. What’s the output?
  • 3. What’s the output?
  • 4. What’s the output?
  • 5. Which one is true?
  • 6. What’s the output?
  • 7. What’s the output?
  • 8. What’s the output?
  • 9. What’s the output?
  • 10. What happens when we do this?
  • 11. What’s the output?
  • 12. What’s the output?
  • 13. What are the three phases of event propagation?
  • 14. All object have prototypes.
  • 15. What’s the output?
  • 16. What’s the output?
  • 17. What’s the output?
  • 18. What’s the output?
  • 19. What’s the output?
  • 20. What’s the output?
  • 21. What’s the value of sum?
  • 22. How long is cool_secret accessible?
  • 23. What’s the output?
  • 24. What’s the output?
  • 25. What’s the output?
  • 26. The JavaScript global execution context creates two things for you: the global object, and the “this” keyword.
  • 27. What’s the output?
  • 28. What’s the output?
  • 29. What’s the output?
  • 30. What’s the output?
  • 31. What is the event.target when clicking the button?
  • 32. When you click the paragraph, what’s the logged output?
  • 33. What’s the output?
  • 34. What’s the output?
  • 35. Which of these values are falsy?
  • 36. What’s the output?
  • 37. What’s the output?
  • 38. What’s the output?
  • 39. Everything in JavaScript is either a…
  • 40. What’s the output?
  • 41. What’s the output?
  • 42. What does the setInterval method return in the browser?
  • 43. What does this return?
  • 44. What’s the output?
  • 45. What does this return?
  • 46. What’s the output?
  • 47. What’s the output?
  • 48. What’s the output?
  • 49. What’s the value of num?
  • 50. What’s the output?
• JavaScript Questions 51 to 100
  • 51. What’s the output?
  • 52. What’s the output?
  • 53. What’s the output?
  • 54. What’s the output?
  • 55. What’s the output?
  • 56. What’s the output?
  • 57. What’s the output?
  • 58. What’s the output?
  • 59. What’s the output?
  • 60. What’s the output?
  • 61. What’s the output?
  • 62. What’s the output?
  • 63. What’s the output?
  • 64. What’s the output?
  • 65. What’s the output?
  • 66. With which constructor can we successfully extend the Dog class?
  • 67. What’s the output?
  • 68. What’s the output?
  • 69. What’s the output?
  • 70. What’s the output?
  • 71. How can we log the values that are commented out after the console.log statement?
  • 72. What’s the output?
  • 73. What’s the output?
  • 74. What’s the output?
  • 75. What’s the output?
  • 76. What’s the output?
  • 77. Is this a pure function?
  • 78. What is the output?
  • 79. What is the output?
  • 80. What is the output?
  • 81. What is the output?
  • 82. What is the output?
  • 83. What is the output?
  • 84. What is the output?
  • 85. What kind of information would get logged?
  • 86. Which option is a way to set hasName equal to true, provided you cannot pass true as an argument?
  • 87. What’s the output?
  • 88. What’s the output?
  • 89. What’s the output?
  • 90. What’s the output?
  • 91. What’s the output?
  • 92. What’s the output?
  • 93. What’s the output?
  • 94. What’s the output?
  • 95. What’s the output?
  • 96. What’s the output?
  • 97. What’s the output?
  • 98. What’s the output?
  • 99. What’s the output?
  • 100. What’s the value of output?
• JavaScript Questions 101 to 150
  • 101. What’s the value of output?
  • 102. What’s the value of output?
  • 103. What’s the value of output?
  • 104. What’s its value?
  • 105. What’s its value?
  • 106. What’s its value?
  • 107. What’s its value?
  • 108. Which of these methods modifies the original array?
  • 109. What’s the output?
  • 110. What does this method do?
  • 111. What’s the output?
  • 112. What’s the output?
  • 113. What’s the output?
  • 114. What will happen?
  • 115. Which method(s) will return the value 'Hello world!'?
  • 116. What’s the output?
  • 117. Which of the following options will return 6?
  • 118. What’s the output?
  • 119. What’s the output?
  • 120. What’s the output?
  • 121. What’s the output?
  • 122. What’s the output?
  • 123. What’s the output?
  • 124. What’s the output?
  • 125. What’s the output?
  • 126. What’s the output?
  • 127. What’s the output?
  • 128. What’s the output?
  • 129. What’s the output?
  • 130. What’s the output?
  • 131. What’s the output?
  • 132. What’s the output?
  • 133. What’s the output?
  • 134. How can we invoke sum in index.js from sum.js?
  • 135. What’s the output?
  • 136. Which of the following will modify the person object?
  • 137. Which of the following will modify the person object?
  • 138. What’s the output?
  • 139. What’s the output?
  • 140. What’s missing?
  • 141. What’s the output?
  • 142. What’s the output?
  • 143. Which of the options result(s) in an error?
  • 144. What do we need to add to the person object to get ["Lydia Hallie", 21] as the output of [...person]?
  • 145. What’s the output?
  • 146. What’s the output?
  • 147. What’s the output?
  • 148. What’s the output?
  • 149. What’s the output?
  • 150. What’s the output?
  • 151. What’s the output?
  • 152. What’s the output?
  • 153. What should the value of method be to log { name: "Lydia", age: 22 }?
  • 154. What’s the output?
  • 155. What’s the output?