Basic And Variables MCQ

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

• Local Variables are destroyed after execution of function.
  ক

  True

  খ

  False
• Variable declared inside JavaScript Function will be called as ____________.
  ক

  Local Variables

  খ

  Global Variables
• Underscore can be used as first letter while declaring variable in JavaScript.
  ক

  True

  খ

  False
• Multiple Declarations of variables are separated by ___________ symbol.
  ক

  Comma

  খ

  Semicolon

  গ

  Asterisk

  ঘ

  Colon
• Initialization of variable can be done by writing _____ operator in between variable name and operand value.
  ক

  EQUALS

  খ

  =

  গ

  VALUE

  ঘ

  ==
• Java Script Variable should be Case ___________.
  ক

  Non Sensitive

  খ

  Sensitive
• Spaces,Punctuation marks are called as __________ Symbols in JavaScript.
  ক

  Punctual

  খ

  None of these

  গ

  Mandetory

  ঘ

  Special
• We can declare ___________ at a time. Select most appropriate option.
  ক

  One or more Variables

  খ

  More than One Variables

  গ

  One Variable Only

  ঘ

  None of these
• Integer Variable is declared using following syntax in JavaScript.
  ক

  int num;

  খ

  Integer num;

  গ

  integer num;

  ঘ

  var num;
• Variable can hold ________ value at a time.
  ক

  Multiple

  খ

  Single

  গ

  None of these

  ঘ

  Double
• JavaScript was invented at _______ Lab.
  ক

  AT&T Bell LAb

  খ

  Google Lab

  গ

  Sun Microsystem

  ঘ

  Netscape
• JavaScript is invented by ________.
  ক

  Helsinki, Linus

  খ

  W3 Group

  গ

  Brendan Eich

  ঘ

  James Gosling
• Which was the first browser to support JavaScript ?
  ক

  IE

  খ

  Netscape

  গ

  Mozilla Firefox

  ঘ

  Google Chrome
• Which attribute is used to specifies that the script is executed when the page has finished parsing (only for external scripts)
  ক

  parse

  খ

  async

  গ

  defer

  ঘ

  type
• It is good to include JS code inside footer section in order to speed up the Page loading time of Webpage.
  ক

  True

  খ

  False
• JS code included inside head section is loaded before loading page.
  ক

  True

  খ

  False
• JavaScript Code can be called by using _________.
  ক

  RMI

  খ

  Triggering Event

  গ

  Preprocessor

  ঘ

  Function / Method
• We can embed JS code inside HTML directly ?
  ক

  True

  খ

  False
• Local Browser used for validations on the Web Pages uses __________.
  ক

  CSS

  খ

  JS

  গ

  HTML

  ঘ

  Java
• JavaScript Code is written inside file having extension __________.
  ক

  .javascript

  খ

  .jsc

  গ

  .jvs

  ঘ

  .js
• JavaScript is ______ Side Scripting Language.
  ক

  Server

  খ

  Browser

  গ

  ISP

  ঘ

  None of These
• Javascript is _________ language.
  ক

  Programming

  খ

  Application

  গ

  None of These

  ঘ

  Scripting
• The basic purpose of the toLocaleString() is to
  ক

  return a localised object representation

  খ

  return a parsed string

  গ

  return a local time in the string format

  ঘ

  return a localized string representation of the object
• The purpose of extensible attribute is to
  ক

  make all of the own properties of that object nonconfigurable

  খ

  to configure and bring a writable property

  গ

  “lock down” objects into a known state and prevent outside tampering

  ঘ

  all of the mentioned
• To determine whether one object is the prototype of (or is part of the prototype chain of) another object, one should use the
  ক

  isPrototypeOf() method

  খ

  equals() method

  গ

  === operator

  ঘ

  none of the mentioned
• A linkage of series of prototype objects is called as :
  ক

  prototype stack

  খ

  prototype chain

  গ

  prototype class

  ঘ

  prototypes
• The object has three object attributes namely
  ক

  Class, parameters, object’s extensible flag

  খ

  Prototype, class, objects’ parameters

  গ

  Prototype, class, object’s extensible flag

  ঘ

  Native object, Classes and Interfacces and Object’s extensible flag
• The unordered collection of properties, each of which has a name and a value is called
  ক

  String

  খ

  Object

  গ

  Serialized Object

  ঘ

  All of the mentioned
• One of the special feature of an interpreter in reference with the for loop is that
  ক

  Before each iteration, the interpreter evaluates the variable expression and assigns the name of the property

  খ

  The iterations can be infinite when an interpreter is used

  গ

  The body of the loop is executed only once

  ঘ

  All of the mentioned
• The enumeration order becomes implementation dependent and non-interoperable if :
  ক

  If the object inherits enumerable properties

  খ

  The object does not have the properties present in the integer array indices

  গ

  The delete keyword is never used

  ঘ

  Object.defineProperty() is not used