Merck Group Data Analyst Interview Questions and Answers

Q1. How to handle noise in data
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Q1. Explain example of window function
Ans. 
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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Q1. Excel shortcut keys?
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Q2. WHAT IS THE ROLE OF DATA ANALYST?
Ans. 
Data Analysts are responsible for collecting, processing, and analyzing data to help organizations make informed decisions.
• Collecting and organizing data from various sources

• Cleaning and processing data to ensure accuracy and reliability

• Analyzing data to identify trends, patterns, and insights

• Creating visualizations and reports to communicate findings

• Providing recommendations based on data analysis

• Collaborating with st...read more
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Q3. What are the skills need for data analyst?
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Skills needed for data analyst include strong analytical skills, proficiency in data analysis tools, programming knowledge, and communication skills.
• Strong analytical skills to interpret complex data sets

• Proficiency in data analysis tools such as Excel, SQL, Python, R, etc.

• Programming knowledge to manipulate and analyze data effectively

• Communication skills to present findings and insights to stakeholders
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Complete discuss about college project

Q1. What is lamda function
Ans. 
Lambda function is an anonymous function in programming that can have multiple arguments but can only have one expression.
• Lambda functions are used for creating small, one-time use functions without the need to define a formal function.

• They are often used in functional programming languages like Python.

• Lambda functions can take any number of arguments, but can only have one expression.

• Example: lambda x: x*2 defines a l
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Q2. Difference between list and tuple
Ans. 
List is mutable, tuple is immutable in Python.
• List can be modified after creation, tuple cannot.

• List uses square brackets [], tuple uses parentheses ().

• List is used for collections of items that may change, tuple for fixed collections.

• Example: list_example = [1, 2, 3], tuple_example = (4, 5, 6)
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Q1. Explain your previous work experience
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Q2. Explain with example how your work related to real life example
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Q1. Tell me about all your Candidature Background.
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Q1. Salary Negotiation
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Q1. Do you know adobe analytics
Ans. 
Yes, I am familiar with Adobe Analytics and have experience using it for data analysis.
• I have used Adobe Analytics to track website traffic and user behavior

• I have created custom reports and dashboards using Adobe Analytics

• I am proficient in extracting insights from Adobe Analytics data to drive business decisions
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Q2. Explain example of window function
Ans. 
Window functions are used to perform calculations across a set of table rows related to the current row.
• Window functions are applied to a set of rows related to the current row in a query result.

• They can be used to calculate running totals, averages, ranks, and more.

• Examples include ROW_NUMBER(), RANK(), DENSE_RANK(), and NTILE().
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