- What are the most common transformations in ETL processes? …
- What is a “staging” area, why is it needed? …
- How would you prepare and develop incremental loads? …
- What is the advantage of third-party tools like SSIS compared to SQL scripts?
In today’s data-driven business landscape, few roles are more crucial than an ETL developer. These software specialists are responsible for designing complex data storage systems that are critical to business intelligence. In short, they turn Big Data into Big Wins.
ETL stands for extract, transform, and load, referring to the general procedure for transferring data from multiple sources to a single data warehouse. Data is then used by analysts to make better business decisions.
Needless to say, if you need an ETL developer, it’s vitally important to hire the right one for your company. It’s no secret that data-savvy businesses outperform their competitors.
Recruiters should be mindful that ETL tools can vary widely. For this reason, you need to tailor the recruitment process to your organization’s specific ETL needs where possible.
We recommend using a skills assessment before the interview, in order to shortlist your best candidates and concentrate on them only—and not spend time interviewing unsuitable applicants.
How To Crack An Interview of ETL
Top Answers to ETL Interview Questions
CTA
ETL stands for extract, transform, and load. These are the three functions of databases that are combined into a single tool such that you can take out data from a particular database and store or keep it in another. This ETL Interview Questions blog has a compiled list of questions that are most generally asked during interviews. Prepare the ETL interview questions listed below and get ready to crack your job interview:
This ETL Interview Questions blog is broadly divided into the categories mentioned below: 1. Basic
Watch this Informatica Full Course video:
Compare between ETL and ELT.
| Criteria | ETL | ELT |
| Flexibility | High | Low |
| Working methodology | Data from the source system to the data warehouse | Leverages the target system to transform data |
| Performance | Average | Good |
ETL and ETL Testing Process Interview Questions and Answers
Here are some ETL interview questions and answers to give you an idea of what to expect:
Top ETL Interview Questions and Answersby Interview Kickstart Team in
Our tried & tested strategy for cracking interviews
How FAANG hiring process works
The 4 areas you must prepare for
How you can accelerate your learnings
ETL or Extract-Transform-Load is the process of Extraction, Transformation, and Loading. In this process, ETL systems serve as the foundation of the data warehouse. The role of any ETL team involves building the back room of a data warehouse. ETL systems extract data from the source systems, implement data quality and consistency standards, confirm data, and deliver data in a presentable format.
The ETL teams need to deliver data effectively to end-user tools, document and protect data lineage, extract data from the source, and assure quality. They also need to maintain consistency across sources, deliver data in a format usable by query tools, clean, conform, add value to data, etc. In this article, weâll look at some ETL interview questions to help you solidify your interview preparation.
Having trained over 11,000 software engineers, we know what it takes to crack the toughest tech interviews. Our alums consistently land offers from FAANG+ companies. The highest ever offer received by an IK alum is a whopping $1.267 Million!
At IK, you get the unique opportunity to learn from expert instructors who are hiring managers and tech leads at Google, Facebook, Apple, and other top Silicon Valley tech companies.
Want to nail your next tech interview? Sign up for our FREE Webinar.
In this article, weâll cover:
FAQ
How do you explain ETL in an interview?
Extract, Transform, and Load, or ETL in short is a three-phase computing process that involves extracting data, then changing it (cleaning, sanitizing, and scrubbing it), and finally loading it into an output data container.
How do I prepare for an ETL developer interview?
- What are the key steps of the ETL process? …
- Why is data warehousing important? …
- What are the key differences between ETL and ELT? …
- What is meant by partitioning in ETL? …
- What types of applications and tools are used in ETL? …
- What are the different types of facts in ETL?
What are the five main steps in the ETL process?
Is ETL tough?
