Top 50+ Data Analyst Interview Questions & Answers
What are the key technical skills for a Data Analyst?
Proficiency in SQL, Excel, and data visualization tools like Tableau or Power BI. Familiarity with Python or R for statistical analysis is a plus.
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How do you write a SQL query to find the second highest salary?
Use the
LIMIT
and
ORDER BY
clauses:
SELECT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 1;
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What is data cleaning and why is it important?
Data cleaning involves removing errors and inconsistencies to ensure data quality. It's crucial for accurate analysis and reliable insights.
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How do you handle missing data in a dataset?
Techniques include removing records, imputing values using mean/median/mode, or using algorithms that support missing values.
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What are the best practices for d
ata visualization
?
Ensure clarity, accuracy, and simplicity. Use appropriate chart types, maintain consistency, and avoid misleading scales.
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Ready to Ace Your Interview?
Review
these questions,
practice your answers, and you'll be well-prepared. Good luck!
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