Zifo RnD Solutions Associate Data Analyst Interview Questions and Answers

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Q1. What is sql? and where to use
Ans. 
SQL is a programming language used for managing and manipulating relational databases.
• SQL stands for Structured Query Language

• Used to retrieve, update, and manage data in relational databases

• Commonly used in data analysis, data manipulation, and data reporting

• Examples: SELECT * FROM table_name, INSERT INTO table_name VALUES (value1, value2)
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Q2. Power bi description and its imp
Ans. 
Power BI is a business analytics tool by Microsoft that provides interactive visualizations and business intelligence capabilities.
• Power BI allows users to connect to a wide variety of data sources and create interactive reports and dashboards.

• Users can easily share their insights with others and collaborate in real-time.

• It offers features like data modeling, data preparation, and data visualization to help organizatio...read more
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Quantity, reasonning, English question and have coding

Questions related to quantitative aptitude , Logical reasoning , Data Interpretation and English Comprehension . The level of the questions asked will be moderate anyone can easily crack the interview test . But try to be good in any two of the above mentioned topic so that you can clear it easily,

Q1. Advance level sql and excel question will be asked first but they are only asked to check your knowledge even if you answer them correctly it won't guarantee you of getting placed . The main part of the in...read more
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Q2. SQL : - Question related to advance level sql like windows function.
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Q3. Excel :- Difference between vlookup and Index(Match)
Ans. 
VLOOKUP searches for a value in the first column of a table and returns a corresponding value in the same row. INDEX/MATCH uses two functions to look up a value based on its position in a table.
• VLOOKUP only searches for values in the first column of a table, while INDEX/MATCH can search for values in any column.

• INDEX/MATCH is more flexible and efficient for large datasets.

• VLOOKUP is easier to use for simple lookups wit...read more
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Q1. Mostly Manager ask from the CV Overall Experience in CDM right from STUDY START UP TO CLOSE OUT ACTIVITIES, EDC TOOLS WORKED ON
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Q2. Explain phases in CDM
Ans. 
CDM stands for Common Data Model. It has three phases: Conceptualization, Design, and Maintenance.
• Conceptualization phase involves understanding the data requirements and defining the scope of the project.

• Design phase includes creating the data model, schema, and data flow diagrams.

• Maintenance phase focuses on data quality, data integration, and ongoing updates to the data model.
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Sas coding test with good questions.

Q1. Unprofessional. Whole team was on audio only the interviewee was on video. Questions were more on your history rather than on technologies.
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Q2. NO response from Hr afterwards.
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Q1. SQL questions from beginner to advanced
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Q2. Duplicates removal
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Q3. Aggregate functions
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Q1. Machine Learning Questions
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Q1. Tell me abut your self
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