JavaScript and Memory Leak MCQ

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

• Which of the following is a way to retain an object in memory?
  ক

  Console Log

  খ

  Closures

  গ

  Destroy objects

  ঘ

  Clear object
• When does a cycle occur during memory leak?
  ক

  No reference occurs

  খ

  Two objects reference

  গ

  One object gets referenced

  ঘ

  Three object gets referenced
• What is the purpose of destroying the functions and objects?
  ক

  Consume unnecessary CPU cycles

  খ

  Prevent the dropping of reference count to 0

  গ

  Centralize the responsibility to clean up

  ঘ

  All of the mentioned
• Which of the following functions are referenced internally?
  ক

  setTimeout

  খ

  setInterval

  গ

  both setTimeout and setInterval

  ঘ

  clearInterval
• The style property belongs to which of the following object?
  ক

  Element

  খ

  Window

  গ

  Location

  ঘ

  Navigation
• What will happen when the data of the jQuery.cache is read from an element? b) Data is read from jQuery.cache c) Unique number is retrieved as elem & Data is read from jQuery.cache d) Data is cleared from jQuery.cache
  ক

  Unique number is retrieved as elem

  খ

  jQuery.expando

  গ

  jQuery.expando

  ঘ

  jQuery.expando
• When does a memory leak happen?
  ক

  Browser doesn’t release memory from objects unnecessary

  খ

  Browser releases too many memories

  গ

  Browser releases memory iteratively

  ঘ

  Browser releases memory quickly
• What is the central concept of JavaScript memory management?
  ক

  Reliability

  খ

  Reachability

  গ

  Efficiency

  ঘ

  Transparency
• Where are memory leaks found?
  ক

  Client side objects

  খ

  Server side objects

  গ

  Both Client side and Server side objects

  ঘ

  User side objects