Computershare Data Analyst Interview Questions and Answers

Q1. Get the maximum salary of the employee from the employee and department table
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Q2. Explain the data analysis process that you would follow for employee salary table
Ans. 
The data analysis process for an employee salary table involves data cleaning, exploration, visualization, and modeling.
• Start by cleaning the data to remove any duplicates, missing values, or outliers.

• Explore the data by calculating basic statistics like mean, median, and standard deviation.

• Visualize the data using histograms, box plots, or scatter plots to identify patterns or trends.

• Perform statistical modeling to an...read more
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Q3. Explain the challenges you faced in your project
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I faced challenges in managing large datasets and ensuring data accuracy in my project.
• Managing large volumes of data from multiple sources

• Ensuring data accuracy and consistency

• Dealing with missing or incomplete data

• Handling data cleaning and preprocessing tasks

• Addressing technical issues with data storage or processing tools
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Q1. Load data from hdfs using python
Ans. 
Use PyArrow library to load data from HDFS in Python
• Install PyArrow library using pip install pyarrow

• Use pyarrow.hdfs.connect to connect to HDFS

• Use pyarrow.parquet.read_table to read data from HDFS
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Q2. Query to find the top three salaried employees of each department
Ans. 
Query to find the top three salaried employees of each department
• Use a SQL query with a window function like ROW_NUMBER() to rank employees within each department based on salary

• Partition the data by department and order by salary in descending order

• Filter the results to only include rows where the row number is less than or equal to 3
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Q1. Different joins
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Q2. Case study
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Revenue impact for casino

40 questions are there. The que have different categories. Reasoning , critical thinking

Q1. Tell me about your self
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Q2. Question based on the resume
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Q3. What are the project you have done?
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Q1. Tell me something about yourself
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I am a data analyst with a strong background in statistics and programming, passionate about deriving insights from data.
• Graduated with a degree in Statistics

• Proficient in programming languages like Python and R

• Experience in data visualization tools like Tableau

• Strong analytical and problem-solving skills

• Passionate about using data to drive business decisions
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Q2. Guesstimates: Whatsapp database users in India
Ans. 
Approximately 400 million Whatsapp users in India
• India has a population of over 1.3 billion

• Whatsapp is one of the most popular messaging apps in India

• Assuming around 30% of the population uses Whatsapp

• Estimate based on internet penetration and smartphone usage in India
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Q3. Problem Solving: How to cut cake into 8 pieces with three slice
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Logical reasoning ,quantitative aptitude

2 coding questions,one was easy and other was medium to tough level

Q1. Sql basics were asked and asked me to write few sql codes
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Q2. Python codes ,and machine learning concepts
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Online self paced test

Q1. Python and sql problem solving questions
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