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Caching And Debugging MCQ question and answer in javascript with solution

Learn Caching And Debugging MCQ Questions and answers in javascript with easy and logical explanations. Caching And Debugging MCQ question in Javascript which provides all type of technical mcq questions which is important for technical exams, cumpus exams and other entrance examination Page-2 section-2

Each section contains 100 MCQs on Caching and Debugging .
11
What is the purpose of the Math method toSource()?
Discuss
Answer & Solution
Answer: Option A
Solution:
The method Math.toSource() returns the string “Math”. But this method does not work with many browsers like IE.
12
How many static methods does a Date object have?
Discuss
Answer & Solution
Answer: Option D
Solution:
The Date object defines two static methods namely Date.parse() and Date.UTC().
13
Which of the following are static methods in JavaScript?
Discuss
Answer & Solution
Answer: Option C
Solution:
Date.parse() parses a string representation of a date and time and returns the internal millisecond representation of that date. Date.UTC() Returns the millisecond representation of the specified UTC date and time.
14
If we have an object r and want to know if it is a Range object, we can write:
Discuss
Answer & Solution
Answer: Option D
Solution:
The r instanceof Range returns true if r inherits from Range.prototype. The instanceof operatory does not actually check whether r was initialized by the Range constructor.
15
What is the property to access the first child of a node?
Discuss
Answer & Solution
Answer: Option D
Solution:
The first child of a node can be accessed using the firstChild property.
16
Which of the following is not an object?
Discuss
Answer & Solution
Answer: Option C
Solution:
There is no object called Position.
17
What is the code snippet to change the class and let the stylesheet specify the details?
Discuss
Answer & Solution
Answer: Option A
Solution:
The above code snippet changes the class and lets the stylesheet specify the details.