The video tutorial covers the concept of regularizing number ranges using regular expressions. It explains how to create regex patterns for various number ranges, including 0-99, 0-1000, 99-9999, 25-75, and 222-240. The tutorial emphasizes the importance of understanding regex for interviews and provides examples to illustrate the creation of these patterns.

What symbol is used to regularize a specific number range?

• Curly braces

• Square brackets

• Parentheses

• Angle brackets

How do you represent a number range from 2 to 6 using regular expressions?

• <2-6>

• [2-6]

• (2-6)

• {2-6}

In a regular expression, what does a question mark signify when placed after a digit?

• The digit is repeated

• The digit is excluded

• The digit is optional

• The digit is mandatory

Which of the following numbers would match the pattern for the range 0 to 99?

• 100

• 101

• 999

• 67

How is the number 1000 included in the range 0 to 1000 using regular expressions?

• By using a wildcard

• By using a range

• By using a literal

• By using a negation

What is the maximum number represented by the expression for the range 0 to 999?

• 100

• 1000

• 999

• 9999

What is the smallest number represented by the expression for the range 100 to 9999?

• 99

• 100

• 101

• 999

How is the number 99 included in the range 99 to 9999?

• By using a range

• By using a literal

• By using a wildcard

• By using a negation

Which expression correctly represents the range from 25 to 29?

• [2-5]

• [25-29]

• [2][5-9]

• [20-29]

What is the maximum number represented by the expression for the range 222 to 240?

• 239

• 240

• 241

• 250