JavaScript Questions & Answers – Error Handling – I

This set of Javascript Multiple Choice Questions & Answers (MCQs) focuses on “Error Handling – I”.

1. What is the code snippet to go back to a history twice?
a) history(2);
b) history(-2);
c) history.go(-2);
d) history.go(2);
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2. If the window has child windows, how will the browsing histories be affected?
a) Numerically interleaved
b) Chronologically interleaved
c) Both Numerically and Chronologically interleaved
d) Numerically or Chronologically interleaved
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3. The length property belongs to which of the following objects?
a) Window
b) Element
c) History
d) Document
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4. What is the datatype of the go() method’s parameter?
a) String
b) Integer
c) Double
d) Float
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5. What is the special feature of modern web applications?
a) Can alter contents without loading document
b) Must load the document to manipulate
c) Remains static
d) Can’t be altered at all
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6. The navigator property belongs to which of the following object?
a) Document
b) Window
c) Navigator
d) Location
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7. What is the vendor-neutral synonym for navigator?
a) staticData
b) purposeInformation
c) dataInformation
d) clientInformation
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8. Which is the preferred testing nowadays for scripting?
a) Software testing
b) Feature testing
c) Blackbox testing
d) Whitebox testing
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9. Which of the below properties can be used for browser sniffing?
a) platform
b) appVersion
c) both platform and appVersion
d) appName
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10. Where is the information of the userAgent property located?
a) appId
b) appName
c) platform
d) appVersion
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11. What will be the output of the following JavaScript code?

function myFunction() 
{
    document.getElementById("demo").innerHTML = Boolean(10 > 9);
}

a) true
b) false
c) error
d) 0
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12. What will be the output of the following JavaScript code?

var b5 = Boolean('false');
document.getElementById("demo").innerHTML =b5;

a) False
b) True
c) Error
d) Undefined
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13. What will be the output of the following JavaScript code?

function myFunction() 
{
  var x = "";
  document.getElementById("demo").innerHTML = Boolean(x);
}

a) true
b) false
c) 0
d) 1
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14. What will be the output of the following JavaScript code?

function myFunction() 
{
   var x = 10 / "H";
   document.getElementById("demo").innerHTML = Boolean(x);
}

a) True
b) False
c) Error
d) Undefined
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15. What will be the output of the following JavaScript code?

function myFunction() 
{
   var x = null;
   document.getElementById("demo").innerHTML = Boolean(x);
}

a) True
b) False
c) Error
d) Undefined
View Answer

Sanfoundry Global Education & Learning Series – Javascript Programming.