✅ Top 50 Data Analytics Interview Questions – Part 3 📊🔥

2️⃣1️⃣ What is Time Series Analysis?
Time Series Analysis involves analyzing data points collected or recorded at specific time intervals. It’s used for forecasting trends, seasonality, and cyclic patterns (e.g., stock prices, sales data).

2️⃣2️⃣ What is the difference between ETL and ELT?
⦁ ETL (Extract, Transform, Load): Data is transformed before loading into the destination.
⦁ ELT (Extract, Load, Transform): Data is loaded first, then transformed within the destination system (common in cloud-based platforms).

2️⃣3️⃣ Explain the concept of Data Warehousing.
A Data Warehouse is a centralized repository that stores integrated data from multiple sources. It supports reporting, analysis, and decision-making.

2️⃣4️⃣ What is the role of a Data Analyst in a business setting?
A Data Analyst helps stakeholders make informed decisions by collecting, cleaning, analyzing, and visualizing data. They identify trends, patterns, and actionable insights.

2️⃣5️⃣ What are KPIs and how do you define them?
KPIs (Key Performance Indicators) are measurable values that indicate how effectively a business is achieving its objectives. Examples: customer retention rate, conversion rate, average order value.

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