Core Java Programming Course- StringBuilder Method

This video tutorial covers the use of StringBuilder methods in Java, including insert, replace, delete, and reverse. It explains how to manipulate strings using these methods, providing examples and discussing the differences between StringBuilder and regular string operations. The tutorial also includes an interview question about reversing a string without using the reverse method.

What is the primary purpose of the insert method in StringBuilder?

• To add a substring at a specified index

• To remove a substring from a string

• To replace a substring with another

• To reverse the entire string

How does the replace method in StringBuilder differ from the replace method in a regular string?

• It uses indices to specify the replacement area

• It replaces all occurrences of a substring

• It only works with single characters

• It appends the new string to the end

In the replace method of StringBuilder, what does the end index represent?

• The total number of characters to replace

• The first character to be replaced

• The last character to be replaced

• The index after the last character to be replaced

What happens when you use the delete method with a single index in StringBuilder?

• It deletes the character at the specified index

• It deletes all characters after the index

• It deletes the entire string

• It deletes the first occurrence of a character

What is the result of using the delete method with a start and end index?

• It removes all characters before the start index

• It removes the characters between the start and end indices

• It removes all characters after the end index

• It removes the entire string

Which method in StringBuilder can reverse the entire string?

• swap

• reverse

• invert

• flip

What is a common interview question related to string reversal?

• How to reverse a string without using the reverse method

• How to insert a string at a specific index

• How to replace a substring with another

• How to delete a character from a string