Analyst Developer Interview Questions and Answers

Find the intersection elements in 2 unsorted arrays

• Sort both arrays to simplify the problem

• Use a hash set to store elements from one array

• Iterate through the other array and check if each element exists in the hash set

• Add the common elements to a result array

row_number(), rank(), and dense_rank() are SQL functions used for ranking and ordering data.

• row_number() assigns a unique number to each row in the result set.

• rank() assigns a unique rank to each row, with ties receiving the same rank and the next rank skipped.

• dense_rank() assigns a unique rank to each row, with ties receiving the same rank and the next rank not skipped.

Propose and calculate promo recommendations to increase GMV for matrix from q1

• Analyze sales data from q1 to identify trends and popular products

• Create targeted promotions for popular products

• Offer bundle deals to encourage customers to purchase more

• Implement a loyalty program to incentivize repeat purchases