Array And Function MCQ

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• Which of the algorithmic languages is lexical scoping standardized in?
  ক

  Ada

  খ

  Pascal

  গ

  Modula2

  ঘ

  All of the mentioned
• Which of the following are examples of closures?
  ক

  Objects

  খ

  Variables

  গ

  Functions

  ঘ

  All of the mentioned
• What is a closure?
  ক

  Function objects

  খ

  Scope where function’s variables are resolved

  গ

  Both Function objects and Scope where function’s variables are resolved

  ঘ

  None of the mentioned
• If you have a function f and an object o, you can define a method named m of o with
  ক

  o.m=m.f;

  খ

  o.m=f;

  গ

  o=f.m;

  ঘ

  o=f;
• Do functions in JavaScript necessarily return a value ?
  ক

  It is mandatory

  খ

  Not necessary

  গ

  Few functions return values by default

  ঘ

  All of the mentioned
• Which of the following is the correct code for invoking a function without this keyword at all, and also too determine whether the strict mode is in effect?
  ক

  var strict = (function { return this; });

  খ

  mode strict = (function() { return !this; }());

  গ

  var strict = (function() { return !this; }());

  ঘ

  mode strict = (function { });
• A function with no return value is called
  ক

  Procedures

  খ

  Method

  গ

  Static function

  ঘ

  Dynamic function
• The function definitions in JavaScript begins with
  ক

  Identifier and Parantheses

  খ

  Return type and Identifier

  গ

  Return type, Function keyword, Identifier and Parantheses

  ঘ

  Identifier and Return type
• The method or operator used to identify the array is
  ক

  isarrayType()

  খ

  ==

  গ

  ===

  ঘ

  typeof
• The reduce and reduceRight methods follow a common operation called
  ক

  filter and fold

  খ

  inject and fold

  গ

  finger and fold

  ঘ

  fold
• The primary purpose of the array map() function is that it
  ক

  maps the elements of another array into itself

  খ

  passes each element of the array and returns the necessary mapped elements

  গ

  passes each element of the array on which it is invoked to the function you specify, and returns an array containing the values returned by that function

  ঘ

  None of the mentioned
• What will happen if reverse() and join() methods are used simultaneously ?
  ক

  Reverses and stores in the same array

  খ

  Reverses and concatenates the elements of the array

  গ

  Reverses

  ঘ

  All of the mentioned
• The pop() method of the array does which of the following task ?
  ক

  decrements the total length by 1

  খ

  increments the total length by 1

  গ

  prints the first element but no effect on the length

  ঘ

  None of the mentioned