Merck Group Analyst Interview Questions and Answers for Experienced

Q1. Introduction and your profile related questions
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Q1. Why do you want to join this company? and this role?
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Q2. Why do you want this role?
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Q1. Types of chromatography.?
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Chromatography is a technique used to separate and analyze mixtures of chemicals based on their properties.
• Types of chromatography include gas chromatography, liquid chromatography, ion exchange chromatography, and affinity chromatography.

• Gas chromatography separates compounds based on their volatility and interactions with a stationary phase.

• Liquid chromatography separates compounds based on their affinity for the mob...read more
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Q2. Trouble shooting of HPLC and GC.?
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Troubleshooting of HPLC and GC involves identifying and resolving issues with the equipment to ensure accurate results.
• Perform regular maintenance checks on the equipment to prevent issues

• Calibrate the instruments regularly to maintain accuracy

• Check for leaks, blockages, or contamination in the system

• Verify the integrity of columns and detectors

• Review method parameters and conditions for any errors or inconsistencies
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Q3. Types Of titration.?
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Types of titration include acid-base titration, redox titration, complexometric titration, and precipitation titration.
• Acid-base titration involves the neutralization of an acid with a base or vice versa.

• Redox titration involves a redox reaction between the analyte and titrant.

• Complexometric titration involves the formation of a complex between the analyte and titrant.

• Precipitation titration involves the formation of a
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Q4. Reverse phase and normal phase.?
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Q5. Types of HPLC and GC columns
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Types of HPLC columns include reverse phase, normal phase, ion exchange, size exclusion, and affinity. Types of GC columns include packed, capillary, and micro-packed columns.
• HPLC columns: reverse phase, normal phase, ion exchange, size exclusion, affinity

• GC columns: packed, capillary, micro-packed
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Q1. Explain example of window function
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Window functions are used to perform calculations across a set of table rows related to the current row.
• Window functions are used in SQL to perform calculations within a specific window or subset of rows.

• They allow you to perform aggregate functions like SUM, AVG, COUNT, etc. over a specific range of rows.

• Examples include ROW_NUMBER(), RANK(), DENSE_RANK(), and NTILE().
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Q2. A question using aggregate function and case when in sql
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Easy if math strong basic

Q1. Case study based questions
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Q1. One to one on technical regarding sql, vba mainly
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Q1. Take home asignment on dataset to examine skill on sql and vba
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It was discussion with manager