Quant Analyst Interview Questions and Answers

Binary search is a divide and conquer algorithm that efficiently searches for a target value within a sorted array.

• Binary search compares the target value to the middle element of the array and eliminates half of the remaining elements each time.

• The array must be sorted in ascending or descending order for binary search to work correctly.

• Binary search has a time complexity of O(log n), making it very efficient for large datasets.

This SQL question tests your ability to manipulate and query data effectively.

• Understand the structure of the tables involved.

• Use JOINs to combine data from multiple tables.

• Utilize WHERE clauses to filter results based on conditions.

• Consider using GROUP BY for aggregating data.

• Example: SELECT AVG(salary) FROM employees WHERE department = 'Sales';