Javascript interview questions part 14
Javascript interview questions part 14
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Total Questions: 20
1. Where is the information of the userAgent property located?
Correct Answer is : appVersion
2. Each tab in the single web browser window is called as ____________
Correct Answer is : Browsing context
3. Nested documents inside the HTML documents can be created using ___________
Correct Answer is : iframe
4. How are windows, tabs, iframes, and frames treated according to client-side javascript?
Correct Answer is : They are all browsing contexts
5. How are windows, tabs, iframes, and frames treated according to javascript?
Correct Answer is : They are all Window objects
6. A new web browser window can be opened using which method of the Window object?
Correct Answer is : Window.open()
7. What will happen if the first argument of open() is omitted?
Correct Answer is : Remains in the same page
8. Which object serves as the global object at the top of the scope chain?
Correct Answer is : Window
9. Which is the property of a Window object that holds the name of the frame?
Correct Answer is : name
10. When will the fourth argument to open() useful?
Correct Answer is : When the second argument names an existing window
11. The inner frame within a top-level window can be referred to as _____________
Correct Answer is : parent.parent
12. What will be the output of the following Javascript code? var string1 = ”123”; var intvalue = 123; alert( string1 + intvalue );
Correct Answer is : 123123
13. A function definition expression can be called as __________
Correct Answer is : Function literal
14. The property of a primary expression is ____________
Correct Answer is : stand-alone expressions
15. Consider the following statements. var text = "testing: 1, 2, 3"; // Sample text var pattern = /\d+/g // Matches all instances of one or more digits In order to check if the pattern matches with the string “text”, the statement is
Correct Answer is : pattern.test(text)
16. The expression of calling ( or executing ) a function or method in JavaScript is called ________
Correct Answer is : Invocation expression
17. What kind of an expression is “new Point(2,3)”?
Correct Answer is : Object Creation Expression
18. Which of the operator is used to test if a particular property exists or not?
Correct Answer is : in
19. Among the following, which one is a ternary operator?
Correct Answer is : ?:
20. “An expression that can legally appear on the left side of an assignment expression.” is a well known explanation for variables, properties of objects, and elements of arrays. They are called
Correct Answer is : Lvalue
