21.
What is the code snippet to go back to a history twice?

22.
If the window has child windows, how will the browsing histories be affected?

23.
The length property belongs to which of the following objects?

24.
What is the datatype of the go() method’s parameter?

25.
What is the special feature of the modern web applications?

26.
The navigator property belongs to which of the following object?

27.
What is the vendor-neutral synonym for navigator?

28.
Which is the preferred testing nowadays for scripting?

29.
Which of the below properties can be used for browser sniffing?

30.
Where is the information of the userAgent property located?

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