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We at Facebook would like to develop a way to estimate the month and day of people's birthdays, regardless of whether people give us that information directly. What methods would you propose, and data would you use, to help with that task?
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Data Scientist

Interviewed at Meta

3.5★
Nov 24, 2016

We at Facebook would like to develop a way to estimate the month and day of people's birthdays, regardless of whether people give us that information directly. What methods would you propose, and data would you use, to help with that task?

# # sales # products # +------------------+---------+ +---------------------+---------+ # | product_id | INTEGER |>--------| product_id | INTEGER | # | store_id | INTEGER | +---<| product_class_id | INTEGER | # | customer_id | INTEGER | | | brand_name | VARCHAR | # +---<| promotion_id | INTEGER | | | product_name | VARCHAR | # | | store_sales | DECIMAL | | | is_low_fat_flg | TINYINT | # | | store_cost | DECIMAL | | | is_recyclable_flg | TINYINT | # | | units_sold | DECIMAL | | | gross_weight | DECIMAL | # | | transaction_date | DATE | | | net_weight | DECIMAL | # | +------------------+---------+ | +---------------------+---------+ # | | # | # promotions | # product_classes # | +------------------+---------+ | +---------------------+---------+ # +----| promotion_id | INTEGER | +----| product_class_id | INTEGER | # | promotion_name | VARCHAR | | product_subcategory | VARCHAR | # | media_type | VARCHAR | | product_category | VARCHAR | # | cost | DECIMAL | | product_department | VARCHAR | # | start_date | DATE | | product_family | VARCHAR | # | end_date | DATE | +---------------------+---------+ # +------------------+---------+ # */ # Question 1: # -- What percent of all products in the grocery chain's catalog # -- are both low fat and recyclable? #
avatar

Data Engineer

Interviewed at Meta

3.5★
Jun 8, 2020

# # sales # products # +------------------+---------+ +---------------------+---------+ # | product_id | INTEGER |>--------| product_id | INTEGER | # | store_id | INTEGER | +---<| product_class_id | INTEGER | # | customer_id | INTEGER | | | brand_name | VARCHAR | # +---<| promotion_id | INTEGER | | | product_name | VARCHAR | # | | store_sales | DECIMAL | | | is_low_fat_flg | TINYINT | # | | store_cost | DECIMAL | | | is_recyclable_flg | TINYINT | # | | units_sold | DECIMAL | | | gross_weight | DECIMAL | # | | transaction_date | DATE | | | net_weight | DECIMAL | # | +------------------+---------+ | +---------------------+---------+ # | | # | # promotions | # product_classes # | +------------------+---------+ | +---------------------+---------+ # +----| promotion_id | INTEGER | +----| product_class_id | INTEGER | # | promotion_name | VARCHAR | | product_subcategory | VARCHAR | # | media_type | VARCHAR | | product_category | VARCHAR | # | cost | DECIMAL | | product_department | VARCHAR | # | start_date | DATE | | product_family | VARCHAR | # | end_date | DATE | +---------------------+---------+ # +------------------+---------+ # */ # Question 1: # -- What percent of all products in the grocery chain's catalog # -- are both low fat and recyclable? #

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