JavaScript Subsets MCQ

Test your knowledge with important JavaScript Subsets MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more JavaScript Subsets MCQs at Bissoy

• Which is the subset that transforms web content into secure modules that can be safely hosted on a web page?
  ক

  Microsoft Web Sandbox

  খ

  ADsafe

  গ

  Caja

  ঘ

  dojox.secure
• Which was one of the first security subsets proposed?
  ক

  FBJS

  খ

  Caja

  গ

  dojox.secure

  ঘ

  ADSafe
• Which is the object that defines methods that allow complete control over page content?
  ক

  The client-side document object

  খ

  The server-side document object

  গ

  Both client-side and server-side document object

  ঘ

  Web document object
• Which are the two functions that are not allowed in any secure subset?
  ক

  evaluate() and restrict()

  খ

  eval() and the Function() constructor

  গ

  debugger() and test()

  ঘ

  eval() and debugger()
• Why is this keyword not preferred in JavaScript?
  ক

  Highly memory consuming

  খ

  Functions should access the global objects

  গ

  Functions should not access the global objects

  ঘ

  Very inefficient to use
• Which is the subset that is a secure container designed for the purpose of safely running untrusted JavaScript?
  ক

  Sandbox

  খ

  The Good Parts

  গ

  Both Sandbox and Good Parts

  ঘ

  Web browser
• Why was “The Good Parts” designed as a language subset in JavaScript?
  ক

  To improve programmer flexibility

  খ

  To balance the workload of the programmer

  গ

  To create an in-built compiler and interpreter

  ঘ

  To improve programmer productivity
• What is being imposed on each subset to ensure that it conforms to the subset?
  ক

  A parser to parse the code

  খ

  A parser that parses and adds to the subset

  গ

  A static verifier that parses code

  ঘ

  A predefined function to parse the code
• What does javascript use instead of == and !=?
  ক

  It uses bitwise checking

  খ

  It uses === and !== instead

  গ

  It uses equals() and notequals() instead

  ঘ

  It uses equalto()
• The Crockford’s subset does not include which function in JavaScript?
  ক

  eval()

  খ

  coeval()

  গ

  equal()

  ঘ

  equivalent()