TypeScript for Beginners - RegEx Program 1

The video tutorial explains how to validate a cell phone number to ensure it has at least 10 digits. It guides through creating a file for validation, defining a string for the cell number, and using a regular expression to enforce the 10-digit rule. The tutorial demonstrates how to apply the regular expression to a string and check its validity using a method that returns true or false. It also covers testing the validation by modifying the number and observing the results in a web browser console.

What is the minimum number of digits required for a valid cell number in this tutorial?

• 10 digits

• 9 digits

• 11 digits

• 8 digits

Which programming construct is used to define the cell number in the tutorial?

• Object

• Function

• String

• Array

What is the purpose of using a regular expression in this tutorial?

• To format the cell number

• To ensure the cell number has exactly 10 digits

• To convert the cell number to a string

• To store the cell number in a database

What method is used to check if the cell number matches the regular expression?

• cellCheck

• cellValidate

• cellMatch

• cellTest

What happens when a digit is removed from the cell number and the code is recompiled?

• The program crashes

• The cell number is automatically corrected

• The cell number is invalid and an error is shown

• The cell number is still valid