Q. Which of the below is invalid identifier with the main method?

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Q. What is the extension of java code files?

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Q. What is the extension of compiled java classes?

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Q. How can we identify whether a compilation unit is class or interface from a .class file?

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Q. What is use of interpreter?

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Q. Which of these package is used for text formatting in Java programming language?

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Q. Which of this class can be used to format dates and times?

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Q. Which of these method returns an instance of DateFormat that can format time information?

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Q. Which of these class allows us to define our own formatting pattern for dates and time?

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Q. Which of these formatting strings of SimpleDateFormat class is used to print AM or PM in time?

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Q. Which of these formatting strings of SimpleDateFormat class is used to print week of the year?

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

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

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

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Q. Which capturing group can represent the entire expression?

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Q. groupCount reports a total number of Capturing groups.

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Q. Which of the following matches nonword character using regular expression in java?

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Q. Which of the following matches end of the string using regular expression in java?

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Q. What does public int end(int group) return?

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Q. What does public String replaceAll(string replace) do?

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