Coldfusion Developer Interview Questions and Answers

Use a hash set to find duplicate elements in an array of strings.

• Create a hash set to store unique elements.

• Iterate through the array and check if each element is already in the hash set.

• If it is, then it is a duplicate element.

• Example: ['apple', 'banana', 'apple', 'orange'] should return 'apple' as a duplicate element.

cfset is used to set a variable value, while cfparam is used to initialize a variable if it does not already exist.

• cfset is used to assign a value to a variable, while cfparam is used to initialize a variable if it does not already have a value

• cfset can be used multiple times to change the value of a variable, while cfparam will only initialize the variable once

• Example: vs

Database connection with CFML involves creating a datasource and using CFQUERY tag to interact with the database.

• Create a datasource in ColdFusion Administrator

• Use CFQUERY tag to execute SQL queries

• Use CFQUERYPARAM tag to prevent SQL injection

• Example: SELECT * FROM myTable