Question 21 : What kind of scoping does JavaScript use?
1. Literal
2. Lexical
3. Segmental
4. Sequential
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Question 22 : Assume that we have to convert 'false' that is a non-string to string. The command that we use is (without invoking the 'new' operator)
1. false.toString()
2. String(false)
3. String newvariable='false'
4. Both false.toString() and String(false)
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Question 23 : The generalised syntax for a real number representation is __________
1. [digits][.digits][(E|e)[(+|-)]digits].
2. [digits][+digits][(E|e)[(+|-)]digits].
3. [digits][(E|e)[(+|-)]digits].
4. [.digits][digits][(E|e)[(+|-)]digits].
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Question 24 : Which of the following are examples of closures?
1. Objects
2. Variables
3. Functions
4. All of the mentioned
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Question 25 : What will happen if a return statement does not have an associated expression?
1. It returns the value 0
2. It will throw an exception
3. It returns the undefined value
4. It will throw an error
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Question 26 : The purpose of extensible attribute is to __________
1. make all of the own properties of that object non configurable
2. to configure and bring a writable property
3. 'lock down' objects into a known state and prevent outside tampering
4. to include new properties into the object
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Question 27 : The main purpose of a “Live Wire” in NetScape is to ________
1. Create linkage between client side and server side
2. Permit server side, JavaScript code, to connect to RDBMS
3. Support only non relational database
4. To interpret JavaScript code
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Question 28 : The 'var' and 'function' are __________
1. Keywords
2. Declaration statements
3. Data types
4. Prototypes
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Question 29 : What is the fundamental rule of lexical scoping?
1. Functions are declared in the scope
2. Functions are executed using scope chain
3. Functions are declared outside the scope
4. Variable are declared within the function
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Question 30 : A linkage of series of prototype objects is called as ________
1. prototype stack
2. prototype chain
3. prototype class
4. prototypes
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