Here are top 20 target objective type ETL training Interview questions with their answers. These sample questions are confined to specialists from Bix IT Academy in Chennai who trains students on ETL Training to give you a thought of kind of problems which might be asked at the time of the interview. We have taken full care to provide clear and to the point answers for every one of the questions. Do give it a thorough read and prepare well. You never know you might get lucky!
The 20 Best Preferred ETL Training Interview Questions
Top Answers to top ETL Training Interview Questions
Q. Distinguish between ELT and ETL
| Base | ELT | ETL |
|---|---|---|
| Flexibility | Low | High |
| Working Procedure | Grasps target system to transform data | Transforms data from source system to data warehouse |
| Performance | Good | Average |
Q. What does ETL process say?
A. The processes involved in ETL training is Extraction, Transforming, and Loading
Q. What is the number of processes involved in ETL Training?
A. In ETL training process, information is extracted from the source, for example, the database servers and it is utilized to produce a business roll.
Q. What steps are involved in the ETL Training Process?
A. The means included are characterizing the source; target, making the mapping, making the session, and making the work process.
Q. Is sub-steps possible for ETL steps?
A. Yes, sub-steps are possible for ETL steps. In fact, every one of the levels associated with ETL has a few sub-steps. The Transform step has the most substeps.
Q. What does Initial Load and Full Load mean?
A. Bix IT Academy in Chennai says that while undergoing ETL training, Initial Load is the procedure for populating all information warehousing tables for the first time. Full load implies when the information is stacked every single set record are accumulated to an extent, based upon its volume. It would eradicate all contents in the table and would reload new information.
Q. What is meant by Incremental Load?
A. Incremental load alludes to applying the dynamic changes as and when required in a particular period and predefined plans.
Q. What is called the Three-Tier system in ETL Training?
A. The Three-Tier system in ETL is called the Data Warehouse
Q. Brief on the Three-Tiers in ETL?
A. The Middle tier in ETL gives the information that is securely usable to end clients. The Other two layers are on the opposite side of the middle level, the end client, and back-end information storage.
Q. Write the names of the layers in ETL?
A. The primary layer in ETL is the source layer, and it is where information lands. The second layer is integration layer where data is stored after transformation. The third layer is the dimension layer where the actual presentation layer stands.
Q. What are Snapshots?
A. Snapshots are the duplicates of read-only data that is stored in the master table.
Q. Elaborate some characteristics of Snapshots?
A. Snapshots are situated on the remote hub and occasionally revived with the goal that the adjustments in the master table can be recorded. They are an imitation of tables.
Q. What is meant by Views?
A. Views are manufactured utilizing the properties of at least one table. Views with single tables can be updated however those with numerous tables can't.
Q. What is Materialized View Log?
A. Materialized view log is the pre-processed table with aggregated or joined information from the fact tables and also the dimension tables.
Q. Explain Material View?
A. Material View is called as an aggregate table.
Q. Compare Power Center with Power Mart?
A. Power Center handles enormous volumes of information whereas Power Mart processes low volumes of data.
Q. What apps can be used to connect Power Center?
A. ERP source like the SAP, Oracle Apps, and the People Soft can be used to connect Power Center.
Q. Which partition is utilized to enhance the performances of ETL exchanges?
A. The session partition is used to enhance the performances of ETL exchanges.
Q. Does Power Mart give connections to ERP sources?
A. No! Power Mart does not connect with any of the ERP sources. It does not permit sessions partition.
Q. What is implied by partitioning in ETL?
A. Partitioning in ETL alludes to the subdivision of the transactions with a specific end goal to enhance their performances.
Cracking an ETL training interview with these questions and answers can be accomplished now. Bix IT Academy in Chennai has made all means possible for you to make it through.
ALL THE VERY BEST!