Core Java Programming Course- RegEx (regular expressions) Exercise 2

The video tutorial explains how to regularize and extract prices from a string using regex. It covers the construction of a regex pattern to match various price formats, including those with digits before and after the decimal point. The tutorial also discusses the significance of escape sequences for special characters like dot and dollar in regex. Implementation details are provided, followed by testing the pattern with different price formats. The tutorial concludes with the relevance of such regex questions in technical interviews at major tech companies.

What is the primary goal of regularizing prices in the context of this tutorial?

• To convert prices into a single currency

• To calculate discounts automatically

• To ensure prices are formatted consistently for extraction

• To display prices in a user-friendly format

Which character is used to denote the start of a price in the regular expression pattern?

• The hash symbol (#)

• The percentage symbol (%)

• The ampersand symbol (&)

• The dollar sign ($)

In the context of regular expressions, what does the dot (.) character typically represent?

• A space character

• The end of a string

• A literal dot

• Any single character

What is the purpose of using a matcher in the code implementation?

• To validate the syntax of the pattern

• To compile the regular expression

• To find and print all matches of the pattern

• To replace all occurrences of a pattern

How does the pattern handle prices with multiple digits after the decimal point?

• By allowing any number of digits after the decimal

• By ignoring digits after the decimal

• By using a fixed number of decimal places

• By rounding to the nearest whole number

What modification was made to test the pattern's flexibility with different prices?

• Using negative prices

• Changing the currency symbol

• Adding extra zeros to the prices

• Removing the decimal point

Why is this type of regular expression question popular in tech interviews?

• It checks proficiency in regex and pattern matching

• It tests knowledge of currency conversion

• It evaluates understanding of string manipulation

• It assesses the ability to work with complex data structures