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technical algorithm problem, Given a list of UserLogs and another list of FunnelDefinitions, you must "merge then" by returning the users that fit with the FunneDefinition. var userLogs = [ "1,123456, click_home_page", "2,123457, click_home_page", "3,123458, click_home_page", "1,123467, add_item_to_cart", "2,123468, add_item_to_cart", "1,123478,finish_shop", "3,123479,finish_shop", ] var funnelDefinilitions = [ "Add Itens to Cart and buy it, click_home_page, add_item_to_cart,finish_shop" ] var expectedOutput = [ "Add Itens to Cart and buy it, "click_home_page (2) [1,2], add_item_to_chart ( 2)[1,2], finish_shop (1) [2]" ] So the output must have the sum by the action of the users that did that and had done the step before.
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Staff Software Engineer

Interviewed at Faire

3.8★
Jan 25, 2023

technical algorithm problem, Given a list of UserLogs and another list of FunnelDefinitions, you must "merge then" by returning the users that fit with the FunneDefinition. var userLogs = [ "1,123456, click_home_page", "2,123457, click_home_page", "3,123458, click_home_page", "1,123467, add_item_to_cart", "2,123468, add_item_to_cart", "1,123478,finish_shop", "3,123479,finish_shop", ] var funnelDefinilitions = [ "Add Itens to Cart and buy it, click_home_page, add_item_to_cart,finish_shop" ] var expectedOutput = [ "Add Itens to Cart and buy it, "click_home_page (2) [1,2], add_item_to_chart ( 2)[1,2], finish_shop (1) [2]" ] So the output must have the sum by the action of the users that did that and had done the step before.

We are working on a clone of Google Docs that allows users to collaborate on documents. Many users can work on the same document at the same time. We have 100 instances of our service running on 100 different machines. Each document needs to be managed exclusively by one instance while it is in use, but one instance can handle multiple documents at once. We have a simple load-balancing system. Because each document has a random numeric ID found in the URL, we use the value of (id % num_instances) to route traffic. For example, with 100 jobs, traffic for document #314814196 is routed to the instance with index 96. How will this system perform as the usage grows?
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Staff Software Engineer

Interviewed at Wayfair

3★
Jul 23, 2024

We are working on a clone of Google Docs that allows users to collaborate on documents. Many users can work on the same document at the same time. We have 100 instances of our service running on 100 different machines. Each document needs to be managed exclusively by one instance while it is in use, but one instance can handle multiple documents at once. We have a simple load-balancing system. Because each document has a random numeric ID found in the URL, we use the value of (id % num_instances) to route traffic. For example, with 100 jobs, traffic for document #314814196 is routed to the instance with index 96. How will this system perform as the usage grows?

We are working on a clone of Facebook. We want to add a numeric count to every post showing how many friends the post" author has at the time of viewing the post, like this: Marie McWilliams (105 friends) I had a great day today, feeling good! Our database has two tables: USER 'user_id' (primary key) 'name' 'created_date' USER_RELATIONSHIP 'friendship_id' (primary key, unique to each relationship) 'user1_id' (indexed) 'user2_id' (indexed) 'start_date' Focusing on the database, how would you implement the friend-count feature? Note we will soon be more popular than Facebook, so the solution needs to scale.
avatar

Staff Software Engineer

Interviewed at Wayfair

3★
Jul 23, 2024

We are working on a clone of Facebook. We want to add a numeric count to every post showing how many friends the post" author has at the time of viewing the post, like this: Marie McWilliams (105 friends) I had a great day today, feeling good! Our database has two tables: USER 'user_id' (primary key) 'name' 'created_date' USER_RELATIONSHIP 'friendship_id' (primary key, unique to each relationship) 'user1_id' (indexed) 'user2_id' (indexed) 'start_date' Focusing on the database, how would you implement the friend-count feature? Note we will soon be more popular than Facebook, so the solution needs to scale.

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