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456 software engineer data interview questions shared by candidates

Problem :Design an org-chart server. Server (preferably multi-threaded) reads the sample file containing employee data. File format: Its semi-colon separated, the first field is the employee-id, 2nd field is name [can be space separated] & the 3rd field is his manager’s id. employee-id will be equal to reports-to-id for CEO. The file can have empty lines. If number of tokens is not equal to 3, it should ignore these lines but report a message/warning and continue. The id’s can be numbers or strings Sample file: ########### 1: CEO: 1 2: CTO: 1 3: VP Sales: 1 4: Tech Manager1: 2 5: Tech Manager2:
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Software Data Engineer- Behavior Analytics

Interviewed at Splunk

4★
Dec 8, 2015

Problem :Design an org-chart server. Server (preferably multi-threaded) reads the sample file containing employee data. File format: Its semi-colon separated, the first field is the employee-id, 2nd field is name [can be space separated] & the 3rd field is his manager’s id. employee-id will be equal to reports-to-id for CEO. The file can have empty lines. If number of tokens is not equal to 3, it should ignore these lines but report a message/warning and continue. The id’s can be numbers or strings Sample file: ########### 1: CEO: 1 2: CTO: 1 3: VP Sales: 1 4: Tech Manager1: 2 5: Tech Manager2:

How did you account for <issues that are commonly known about problem domain>? Do you know if there are any disadvantages to using this method/algorithm/model? Can you explain in detail how <algorithm referenced in presentation code but called from ext library> works? How would you work on this code collaboratively? Are there any improvements you would make to the code before production? How would you make this script machine readable? What was your experience like working with <programming language> on <project in CV>?
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Research Data Scientist/Research Software Engineer

Interviewed at The Alan Turing Institute

2.6★
Oct 29, 2021

How did you account for <issues that are commonly known about problem domain>? Do you know if there are any disadvantages to using this method/algorithm/model? Can you explain in detail how <algorithm referenced in presentation code but called from ext library> works? How would you work on this code collaboratively? Are there any improvements you would make to the code before production? How would you make this script machine readable? What was your experience like working with <programming language> on <project in CV>?

In codility test they asked me to code in Java script. I am data engineer how can I do coding in Javascript. I know language is similar like java but the problem statement was for web developement guy. Also there was no option to change language in codility. This was not good at all. I contacted recruiter 3 times after that but no reply from them. Please its request to recruiters to be professional on this.
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Software Engineer-Big Data

Interviewed at Zalando

3.6★
Mar 11, 2020

In codility test they asked me to code in Java script. I am data engineer how can I do coding in Javascript. I know language is similar like java but the problem statement was for web developement guy. Also there was no option to change language in codility. This was not good at all. I contacted recruiter 3 times after that but no reply from them. Please its request to recruiters to be professional on this.

Na etapa com o Delivery Manager, o bate-papo teve foco em entender como é o meu perfil de liderança, como eu agiria em determinadas situações, como me vejo em X anos na empresa, como os meus objetivos pessoais e profissionais estão alinhados com os objetivos estratégicos da organização, e quais eram as minhas dúvidas em relação à empresa que o DM pudesse me ajudar a esclarecer.
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Lead Data Software Engineer

Interviewed at EPAM Systems

4★
Oct 13, 2025

Na etapa com o Delivery Manager, o bate-papo teve foco em entender como é o meu perfil de liderança, como eu agiria em determinadas situações, como me vejo em X anos na empresa, como os meus objetivos pessoais e profissionais estão alinhados com os objetivos estratégicos da organização, e quais eram as minhas dúvidas em relação à empresa que o DM pudesse me ajudar a esclarecer.

Na entrevista técnica, houve questões relacionadas à modelagem de dados, conceitos, etc. Também foi necessário desenhar uma arquitetura de dados em nível macro para uma determinada situação, bem como escrever códigos em SQL, Python e PySpark para algumas poucas questões, porém, nada extremamente complexo.
avatar

Lead Data Software Engineer

Interviewed at EPAM Systems

4★
Oct 13, 2025

Na entrevista técnica, houve questões relacionadas à modelagem de dados, conceitos, etc. Também foi necessário desenhar uma arquitetura de dados em nível macro para uma determinada situação, bem como escrever códigos em SQL, Python e PySpark para algumas poucas questões, porém, nada extremamente complexo.

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