Innovatics Data Analyst Interview Questions and Answers

Grammar essay writting

Q1. About my self Explain
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Q2. How u manage shift
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Normal Group discussion

Q1. Cosing, project management etc
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Q1. What is coalesce
Ans. 
Coalesce is a function used to return the first non-null value in a list of expressions.
• Coalesce function is commonly used in SQL to handle null values.

• It takes multiple arguments and returns the first non-null value.

• Example: COALESCE(column1, column2, 'default') will return the value of column1 if not null, else column2, and if both are null, it will return 'default'.
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Q2. What is repartition
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Repartition is the process of redistributing data across partitions in a distributed system.
• Repartitioning helps in balancing the workload and improving performance in distributed computing environments.

• It involves moving data between partitions based on certain criteria such as key values or hash functions.

• Repartitioning can be done in Spark using operations like repartition() or coalesce().
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Q1. Non repeatable character
Ans. 
A non repeatable character is a character that appears only once in a given string.
• Iterate through the string and count the frequency of each character

• Identify the characters that have a frequency of 1

• Return the first non repeatable character found
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Q2. Sort list without sort method
Ans. 
Sort list without using sort method
• Create a custom sorting function using loops

• Compare each element with every other element to determine the correct order

• Swap elements based on the comparison results
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Q1. Tableau difference between blend &join
Ans. 
Blend combines data from different data sources in a single view, while join combines data from the same data source.
• Blend is used when data comes from different data sources, join is used when data comes from the same data source

• Blend creates a relationship between data sources without actually merging the data, join merges the data based on a common field

• Blend can be used to combine data from different databases like...read more
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Q1. SQL-related questions working of self join and what will be used in case of 2nd max
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Grammar essay writting

Q1. About my self Explain
Add your answer
Q2. How u manage shift
Add your answer

Normal Group discussion

Q1. Cosing, project management etc
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Q1. Basic details as to why looking for a change
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Q1. Intermediate questions for tableau, SQL
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Q1. Managerial interview
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Q1. Salary negotiation
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Q1. Personality wise questions? Past work experience? Skill set?
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Q2. Past work experience
Ans. 
I have worked as a data analyst for 5 years in various industries.
• Worked as a data analyst for 5 years in various industries

• Analyzed and interpreted data to provide insights and recommendations

• Created reports and dashboards to visualize data

• Collaborated with cross-functional teams to identify business opportunities

• Developed and implemented data-driven strategies to improve business performance
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