Coldfusion Developer

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Coldfusion Developer Interview Questions and Answers

Updated 13 Aug 2024

Q1. Logical question to find duplicate array elements

Ans.

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

Ans.

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

Ans.

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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