JavaScript in Web Browsers MCQ

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• What is the JavaScript code snippet to change the class and let the stylesheet specify the details?
  ক

  timestamp.className = “highlight”;

  খ

  timestamp.className = “change”;

  গ

  timestamp.className = “specify”;

  ঘ

  timestamp.className = “move”;
• Which of the following is not an object?
  ক

  Element

  খ

  Location

  গ

  Position

  ঘ

  Window
• What is the JavaScript code snippet to update the content of the timestamp element when the user clicks on it?
  ক

  timestamp.onLoad = function() { this.innerHTML = new Date().toString(); }

  খ

  timestamp.onclick = function() { this.innerHTML = new Date().toString(); }

  গ

  timestamp.onload = function() { this.innerHTML = new Date().toString(); }

  ঘ

  timestamp.onclick = function() { innerHTML = new Date().toString(); }
• What is the JavaScript code snippet to find all container elements with class “reveal”?
  ক

  var elements = document.getElementsByClassName(“reveal”);

  খ

  var elements = document.getElementByClassName(“reveal”);

  গ

  var elements = document.getElementByName(“reveal”);

  ঘ

  var elements = document.getElementsClassName(“reveal”);
• When a program contains extensive use of event handlers, which of the following is necessary?
  ক

  Modular functions

  খ

  Nested functions

  গ

  Split up programs

  ঘ

  Global variables
• Which handler is triggered when the content of the document in the window is stable and ready for manipulation?
  ক

  onload

  খ

  manipulate

  গ

  create

  ঘ

  onkeypress
• Which of the following object belongs to the style property?
  ক

  Element

  খ

  Window

  গ

  Location

  ঘ

  Dynamic
• What are the properties supporting CSS styles for a document element?
  ক

  style and font

  খ

  style and className

  গ

  size and style

  ঘ

  className and font
• What is the property to access the first child of a node?
  ক

  timestamp.Child1

  খ

  timestamp.Child(1)

  গ

  timestamp.Child(0)

  ঘ

  timestamp.firstChild
• How to pick a document element based on the value of its id attribute?
  ক

  getElementsbyId()

  খ

  getElementbyId()

  গ

  both getElementsbyId() and getElementbyId()

  ঘ

  getElement
• Which is the property that represents the content displayed in the window?
  ক

  document

  খ

  content

  গ

  window

  ঘ

  frame
• When will the window property come into play?
  ক

  Representation convenience

  খ

  Use as an extension of other objects

  গ

  Use objects in the Window object

  ঘ

  Refer to window object itself
• Which of the following is a global object?
  ক

  Register

  খ

  Location

  গ

  Window

  ঘ

  Position
• The setTimeout() method is used to _______________
  ক

  Make the event sleep

  খ

  Register a function to be invoked after a certain time

  গ

  Invoke an event after a certain time

  ঘ

  Time for iteration
• Which Window object method is used to display a message in a dialog box?
  ক

  alert()

  খ

  prompt()

  গ

  message()

  ঘ

  console.log
• Which property in the Window object is used to refer to a Location object?
  ক

  position

  খ

  area

  গ

  window

  ঘ

  location
• Which identifier is used to represent a web browser window or frame?
  ক

  frames

  খ

  window

  গ

  location

  ঘ

  frame
• Which object is the main entry point to all client-side JavaScript features and APIs?
  ক

  Standard

  খ

  Location

  গ

  Window

  ঘ

  Position
• The word “document” mainly refers to ______________
  ক

  Dynamic Information

  খ

  Static Information

  গ

  Both Dynamic and Static Information

  ঘ

  Temporary information