Coldfusion Developer
Coldfusion Developer Interview Questions and Answers
Q1. Logical question to find duplicate array elements
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.
Q2. Difference between cfset and cfparam
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
Q3. Database connection with CFML
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
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