6. groupCount reports a total number of Capturing groups.

1. 1. False

   
   
   

   2. True

   
   
   

   3. NA

   
   
   

   4. NA

   
   
   

   5. NA

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   groupCount reports total number of Capturing groups. this does not include special group, group 0.

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7. Which capturing group can represent the entire expression?

1. 1. group * or group 0

   
   
   

   2. group *

   
   
   

   3. group 0

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Group 0 is a special group which represents the entire expression.

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8. Object of which class is used to compile regular expression?

1. 1. Matcher class

   
   
   

   2. Pattern class

   
   
   

   3. PatternSyntaxException

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   object of Pattern class can represent compiled regular expression.

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9. What is the significance of Matcher class for regular expression in java?

1. 1. Performs match in the string

   
   
   

   2. interpreted both pattern and performs match operations in the string

   
   
   

   3. interpretes pattern in the string

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   macther() method is invoked using matcher object which interpretes pattern and performs match operations in the input string.

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10. Which of the following is not a class of java.util.regex?

1. 1. PatternSyntaxException

   
   
   

   2. Regex class

   
   
   

   3. matcher class

   
   
   

   4. Pattern class

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   java.util.regex consists 3 classes. PatternSyntaxException indicates syntax error in regex.

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