Merck Group Senior Analyst Interview Questions and Answers

HPLC system is a high-performance liquid chromatography system used for separating, identifying, and quantifying components in a mixture.

• HPLC system uses a liquid mobile phase to separate and analyze components in a sample

• It consists of a pump, injector, column, detector, and data acquisition system

• It is commonly used in pharmaceuticals, food and beverage, environmental analysis, and forensic science

• Examples of applica...read more

Alcoa plus system is a quality control system used in manufacturing to ensure accuracy and consistency.

• Alcoa plus system is used in manufacturing to ensure quality control

• It involves a set of procedures and guidelines to ensure accuracy and consistency

• It is named after the acronym ALCOA, which stands for Attributable, Legible, Contemporaneous, Original, and Accurate

• The system is commonly used in the pharmaceutical indu...read more

Aligning personal goals with company goals to drive mutual success

• Setting personal goals that contribute to achieving company objectives

• Regularly reviewing progress towards both personal and company goals

• Seeking opportunities to align individual strengths with organizational needs

• Collaborating with team members to ensure collective efforts support company mission

• Celebrating achievements that benefit both personal growt

Visited a manufacturing plant to observe production processes and learn about industry practices.

• Learned about the different stages of production

• Observed how raw materials are transformed into finished products

• Interacted with industry professionals to gain insights into the manufacturing sector

Chromatography is a technique used to separate and analyze mixtures of chemicals based on their properties.

• Chromatography involves passing a mixture through a stationary phase, which separates the components based on their interactions with the stationary phase and mobile phase.

• Different types of chromatography include gas chromatography, liquid chromatography, and thin-layer chromatography.

• It is widely used in various...read more

Analysis is the process of examining data or information to uncover insights, patterns, and trends.

• Analysis involves breaking down complex information into smaller components for better understanding.

• It helps in making informed decisions based on the findings.

• Examples include financial analysis to assess company performance, data analysis to identify trends in customer behavior, and market analysis to understand indust

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

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

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

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

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().