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Four main DIFFERENCE between TMAP and tJoin?
Below are the four main difference between tMap and tJoin. And there is a common thing in between TWO of this are tJoin or tMap can both be used to create a join between different data sources.
(1)tMap:-Here we can filter data using filter expressions.
(1)tJoin:-Here we can not filter data using tJoin command.

(2)tMap:-This will supports multiple TYPES of join MODELS and example of these are unique join, first join and all joins.
(2)tJoin:-This will only supports unique join.

(3)tMap:-tMap can have more than one output links.
(3)tJoin:-tJoin can have only two output links and example are(main and reject)

(4)tMap:-tMap can accept only two input links and example are main and lookup.
(4)tJoin:-tJoin can accept multiple input links and example are one is main and rest are lookups.

In which langauage TALEND is WRITTEN?
Talend is written in JAVA PROGRAMMING LANGUAGE,

Tell something about Talend?
Below are the some IMPORTANT facts about the Talend which will clarify what Talend is.
(1)Talend is an open source SOFTWARE integration platform.
(2)Talend provides data integration and data mangement solutions.
(3)Talend is also called as ETL tool for data integration.
(4)Talend Open studio is the first product by Talend for Data integration.
(5)Talend provides various integration software and service for BiData, Cloud STORAGE, Data Integration, DataMangement, Master Data Mangement, Data Quality, Data Preparation and for enterprise applications.
(6)For all above product Talend have SEPARATE PRODUCTS.

When was Talend tool FIRST launched?
Talend Open STUDIO was first launched in OCTOBER in year 2006.