DataMetica QA Engineer Interview Questions, Process, and Tips

Apitude test with coding test two sql questions,

Q1. What is ETL, Layers of ETL, Do you know any ETL automation tool
Ans. 
ETL stands for Extract, Transform, Load. It is a process used to extract data from various sources, transform it into a consistent format, and load it into a target database.
• ETL involves three main layers: Extraction, Transformation, and Loading.

• Extraction: Data is extracted from various sources such as databases, files, APIs, etc.

• Transformation: Data is cleaned, validated, and transformed into a consistent format.

• Load...read more
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Q2. Python star pattern 1 12 123, Differnce between List and Dictionary
Ans. 
Python star pattern 1 12 123 is a pattern printing question. List and Dictionary are data structures in Python.
• Python star pattern 1 12 123 can be achieved using nested loops.

• Lists are ordered collections of items, accessed by index. Dictionaries are key-value pairs, accessed by key.

• Example: List - [1, 2, 3], Dictionary - {'a': 1, 'b': 2, 'c': 3}
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Q3. 10-12 Queries based on joins, max function etc, difference between rank, dense rank, row_number and its syntax, how to combine two columns without concat function. What is Alias. What is the use of partiti...read more
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Q4. Do you know GCP? Do you know bigquery?
Ans. 
Yes, I am familiar with Google Cloud Platform (GCP) and BigQuery.
• I have experience working with GCP services such as Compute Engine, Cloud Storage, and BigQuery.

• I have used BigQuery for analyzing large datasets and running complex queries.

• I am familiar with setting up data pipelines and ETL processes using GCP services.
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Q5. Q based on resume Shell scripting commands what is -x what is chmod 757 on owner group and others
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Q6. What is SDLC, STLC
Ans. 
SDLC stands for Software Development Life Cycle and STLC stands for Software Testing Life Cycle.
• SDLC is a process used by software development teams to design, develop, and test high-quality software.

• STLC is a subset of SDLC focused specifically on the testing phase of the software development process.

• SDLC includes phases like planning, analysis, design, implementation, and maintenance.

• STLC includes phases like test pl...read more
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