Online Access Free JavaScript-Developer-I Exam Questions

A class was written to represent regular items and sale items. Code:
01 let regItem = new Item( ' Scarf ' , 55);
02 let saleItem = new SaleItem( ' Shirt ' , 80, .1);
03 Item.prototype.description = function() { return ' This is a ' + this.name; }
04 console.log(regItem.description());
05 console.log(saleItem.description());
06
07 SaleItem.prototype.description = function() { return ' This is a discounted ' + this.name; }
08 console.log(regItem.description());
09 console.log(saleItem.description());
What is the output?

• A.This is a Scarf
  Uncaught TypeError: saleItem.description is not a function
  This is a Scarf
  This is a discounted Shirt
• B.This is a Scarf
  This is a Shirt
  This is a discounted Scarf
  This is a discounted Shirt
• C.This is a Scarf
  This is a Shirt
  This is a Scarf
  This is a discounted Shirt
• D.This is a Scarf
  Uncaught TypeError: saleItem.description is not a function
  This is a Shirt
  This is a discounted Shirt

A developer executes:
document.cookie;
document.cookie = ' key=John Smith ' ;
What is the behavior?

• A.Cookies are read, but the key value is not set because the value is not URL encoded.
• B.Cookies are not read because line 01 should be document.cookies, but the key value is set and all cookies are wiped.
• C.Cookies are read and the key value is set, the remaining cookies are unaffected.
• D.Cookies are read and the key value is set, and all cookies are wiped.

Given the code:
const copy = JSON.stringify([new String( ' false ' ), new Boolean(false), undefined]); What is the value of copy?

• A.' [ " false " , false, null] '
• B.' [false, {}] '
• C.' [ " false " , false, undefined] '
• D.' [ " false " , {}] '

Refer to the code below:
01 const addBy = ?
02 const addByEight = addBy(8);
03 const sum = addByEight(50);
Which two functions can replace line 01 and return 58 to sum?

• A.const addBy = function(num1) {
  return function(num2) {
  return num1 + num2;
  }
  }
• B.const addBy = function(num1) {
  return num1 * num2;
  }
• C.const addBy = (num1) = > num1 + num2;
• D.(Corrected for typing errors)
  const addBy = (num1) = > {
  return function(num2) {
  return num1 + num2;
  }
  }

A developer executes:
document.cookie;
document.cookie = ' key=John Smith ' ;
What is the behavior?

• A.Cookies are read, but the key value is not set because the value is not URL encoded.
• B.Cookies are not read because line 01 should be document.cookies, but the key value is set and all cookies are wiped.
• C.Cookies are read and the key value is set, the remaining cookies are unaffected.
• D.Cookies are read and the key value is set, and all cookies are wiped.