Core Java Programming Course- String Search Operations

This video tutorial covers string search operations, including checking for substring presence, using methods like contains, startsWith, and endsWith, and handling case sensitivity. It also explains how to find the index of substrings using indexOf and lastIndexOf methods, with examples to illustrate these concepts.

What will the 'contains' method return if the substring is not found in the main string?

• An error

• False

• True

• Null

How can you make a 'contains' operation case-insensitive?

• It is not possible

• Use 'containsIgnoreCase' method

• Use 'equalsIgnoreCase' method

• Convert both strings to uppercase or lowercase

Which method would you use to check if a string starts with a specific substring?

• endsWith

• indexOf

• contains

• startsWith

What does the 'indexOf' method return?

• The length of the substring

• The index of the last occurrence of a substring

• The index of the last character of the substring

• The index of the first occurrence of a substring

How can you find the index of the second occurrence of a substring?

• Use 'indexOf' with a start index

• Use 'lastIndexOf'

• Use 'contains' twice

• Use 'startsWith'

What is the purpose of the 'lastIndexOf' method?

• To find the last occurrence of a substring

• To check if a string ends with a substring

• To find the first occurrence of a substring

• To find the length of a substring

When using 'lastIndexOf', what does it return?

• The index of the first occurrence

• The total number of occurrences

• The index of the last character of the last occurrence

• The index of the first character of the last occurrence