Frage im Vorstellungsgespräch bei IQVIA

Difference between Python lists and tuples. What is OOP? Explain concepts like inheritance and polymorphism. What is SQL? Difference between WHERE and HAVING. Write a simple SQL query to fetch records from a table. Difference between INNER JOIN and LEFT JOIN. What is normalization in databases? Explain one of your projects in detail. What challenges did you face during the project and how did you solve them? Tell me about yourself. Why do you want to join IQVIA? How do you handle deadlines and pressure? Estimate how many mobile phones are used in a city. Why IQVIA?