First was a very simple SQL based test consisting of few questions.
The second was telephone round mostly focused on experience with handling big data.
Finally was the on-site round with a complete workshop of writing SQL and making a presentation.
All were simple SQL based questions. The only thing is to focus more on your SQL joins during the workshop. They will give you many to many relationship tables so you can end up creating duplicates.
The following metrics were computed from 1 interview experience for the Fiserv Data Engineer role in Nenagh, Ireland.
Fiserv's interview process for their Data Engineer roles in Nenagh, Ireland is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for Fiserv's Data Engineer interview process in Nenagh, Ireland.