Upwork Interview Questions and Answers

I have worked on Tableau for data visualization and analysis.

• Created interactive dashboards to visualize sales data

• Used Tableau to analyze customer behavior patterns

• Integrated Tableau with SQL databases for real-time reporting

HAVING is used with GROUP BY to filter groups, WHERE is used to filter rows before grouping.

• HAVING is used with GROUP BY to filter groups based on aggregate functions

• WHERE is used to filter rows before grouping

• HAVING is applied after the GROUP BY clause, WHERE is applied before

A palindrome program checks if a given string reads the same forwards and backwards.

• Create a function that takes a string as input

• Remove any spaces and punctuation from the string

• Reverse the string and compare it to the original string to check for palindrome

Market research is the process of gathering, analyzing, and interpreting information about a market, including customers, competitors, and industry trends.

• Involves collecting data on customer preferences, buying habits, and market trends

• Helps businesses make informed decisions about product development, pricing, and marketing strategies

• Can include surveys, focus groups, and data analysis

• Examples: conducting a survey to understand customer satisfaction levels, analyzing compet...read more

Use SQL query with ORDER BY and LIMIT to find 2nd highest salary.

• Use ORDER BY clause to sort salaries in descending order.

• Use LIMIT 1,1 to skip the highest salary and fetch the second highest salary.

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 1,1;