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Research Now Data Analyst Interview Questions and Answers
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1 interview found
Anonymous
I applied via Referral and was interviewed before Sep 2020. There was 1 interview round.
Interview Questionnaire
7 Questions
- Q1. Tell me about your self?
- Q2. Your family background ?
- Q3. Your experience and procedures you follow in current organization
- Q4. Sig-testing ?
- Q5. Shared Table ?
- Ans.
Shared table refers to a database table that is accessible and can be used by multiple users or applications.
Shared tables are commonly used in collaborative projects where multiple users need to access and modify the same data.
They can also be used to consolidate data from different sources into a single table for analysis.
Shared tables require proper access control and data management to ensure data integrity and sec...
- Q6. Weighing and their type ?
- Ans.
Weighing refers to the process of measuring the weight of an object or substance. There are different types of weighing methods.
Types of weighing include balance weighing, spring weighing, and hydraulic weighing
Balance weighing involves comparing the weight of an object to a known weight
Spring weighing uses a spring to measure the weight of an object
Hydraulic weighing uses fluid pressure to determine weight
Weighing is ...
- Q7. Any 5 syntaxes you use ?
- Ans.
I use SQL, Python, R, SAS, and MATLAB syntaxes for data analysis.
SQL syntax for querying and manipulating data in databases
Python syntax for data cleaning, visualization, and machine learning
R syntax for statistical analysis and data visualization
SAS syntax for data management and statistical analysis
MATLAB syntax for numerical analysis and scientific computing
Interview Preparation Tips
As per current market situation read Python Basic and few package
If experience then focus on your knowledge
Skills evaluated in this interview
Interview questions from similar companies
rushi sukre
Selected
I applied via Naukri.com and was interviewed in May 2024. There was 1 interview round.
(2 Questions)
- Q1. Tell me about your projects
- Q2. Tell me yourself
Shrikanth Patil
(2 Questions)
- Q1. What are SQL Joins?
- Ans.
SQL Joins are used to combine rows from two or more tables based on a related column between them.
SQL Joins are used to retrieve data from multiple tables based on a related column between them.
Common types of SQL Joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;
- Q2. Different functions in Python numpy
- Ans.
Python numpy provides various functions for numerical operations on arrays.
numpy.sum() - calculates the sum of array elements
numpy.mean() - calculates the mean of array elements
numpy.max() - returns the maximum value in an array
numpy.min() - returns the minimum value in an array
numpy.std() - calculates the standard deviation of array elements
Skills evaluated in this interview
Selected
I applied via LinkedIn and was interviewed before Aug 2023. There were 2 interview rounds.
(2 Questions)
- Q1. Difference between union and union all in SQL?
- Ans.
Union combines and removes duplicates, Union All combines without removing duplicates.
Union combines result sets and removes duplicates
Union All combines result sets without removing duplicates
Union is slower than Union All as it involves removing duplicates
Example: SELECT column1 FROM table1 UNION SELECT column1 FROM table2;
Example: SELECT column1 FROM table1 UNION ALL SELECT column1 FROM table2;
- Q2. How to show top 5 in pandas?
- Ans.
To show top 5 in pandas, use the nlargest() function.
Use the nlargest() function with the 'n' parameter set to 5 to get the top 5 values in a pandas DataFrame.
For example: df['column_name'].nlargest(5) will return the top 5 values in the specified column.
(1 Question)
- Q1. If we have 3 numerical columns, which chart is a better representation these column?
- Ans.
A scatter plot is a better representation for 3 numerical columns.
Use a scatter plot to show the relationship between the numerical columns.
Scatter plots are effective for visualizing correlations and patterns in data.
Each point on the plot represents a data point with values from all 3 columns.
Interview Preparation Tips
- SQL Server
- Pandas
- Power Bi
Skills evaluated in this interview
Selected
I applied via Naukri.com and was interviewed in May 2024. There was 1 interview round.
(2 Questions)
- Q1. Tell me about your projects
- Q2. Tell me yourself
(2 Questions)
- Q1. What are SQL Joins?
- Ans.
SQL Joins are used to combine rows from two or more tables based on a related column between them.
SQL Joins are used to retrieve data from multiple tables based on a related column between them.
Common types of SQL Joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;
- Q2. Different functions in Python numpy
- Ans.
Python numpy provides various functions for numerical operations on arrays.
numpy.sum() - calculates the sum of array elements
numpy.mean() - calculates the mean of array elements
numpy.max() - returns the maximum value in an array
numpy.min() - returns the minimum value in an array
numpy.std() - calculates the standard deviation of array elements
Skills evaluated in this interview
Selected
I applied via LinkedIn and was interviewed before Aug 2023. There were 2 interview rounds.
(2 Questions)
- Q1. Difference between union and union all in SQL?
- Ans.
Union combines and removes duplicates, Union All combines without removing duplicates.
Union combines result sets and removes duplicates
Union All combines result sets without removing duplicates
Union is slower than Union All as it involves removing duplicates
Example: SELECT column1 FROM table1 UNION SELECT column1 FROM table2;
Example: SELECT column1 FROM table1 UNION ALL SELECT column1 FROM table2;
- Q2. How to show top 5 in pandas?
- Ans.
To show top 5 in pandas, use the nlargest() function.
Use the nlargest() function with the 'n' parameter set to 5 to get the top 5 values in a pandas DataFrame.
For example: df['column_name'].nlargest(5) will return the top 5 values in the specified column.
(1 Question)
- Q1. If we have 3 numerical columns, which chart is a better representation these column?
- Ans.
A scatter plot is a better representation for 3 numerical columns.
Use a scatter plot to show the relationship between the numerical columns.
Scatter plots are effective for visualizing correlations and patterns in data.
Each point on the plot represents a data point with values from all 3 columns.
Interview Preparation Tips
- SQL Server
- Pandas
- Power Bi
Skills evaluated in this interview
Selected
I applied via Company Website and was interviewed before Dec 2023. There were 2 interview rounds.
(1 Question)
- Q1. About myself & my work experience
(1 Question)
- Q1. SQL & Python related Qs
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