Bash Shell Scripting - String Comparison Operators

The video tutorial covers string comparison operators, starting with an introduction to the concept. It explains how to declare variables and use the if block to compare strings. The tutorial demonstrates checking if a string is null or non-null, using operators like '-z' and '-n'. The video concludes with a summary of the techniques discussed.

What is the purpose of using the 'equal to' operator in string comparison?

• To convert a string to uppercase

• To check if two strings are identical

• To find the length of a string

• To concatenate two strings

Which operator would you use to verify that two strings are not the same?

• Less than

• Greater than

• Not equal to

• Equal to

What does the '-z' operator check for in a string?

• If the string is equal to another string

• If the string contains only numbers

• If the string is null

• If the string is not null

How can you ensure a string is not null before performing operations on it?

• Use the 'not equal to' operator

• Use the '-z' operator

• Use the '-n' operator

• Use the 'equal to' operator

What will be the result of comparing a non-empty string with a null string using the '-n' operator?

• True

• False

• Undefined

• Error