Senior Developer Interview Questions

29,166 senior developer interview questions shared by candidates

Minimum number of times you need to use a scale to find the heaviest of the 8 balls, and what's the mximum number of balls you can weigh using 2 chances. Once I answered they asked the next question as What's the maximum number of balls we can use to find out the heaviest in 3 tries?
avatar

Senior Software Developer

Interviewed at Scott Logic

2.5
Dec 8, 2022

Minimum number of times you need to use a scale to find the heaviest of the 8 balls, and what's the mximum number of balls you can weigh using 2 chances. Once I answered they asked the next question as What's the maximum number of balls we can use to find out the heaviest in 3 tries?

Company for some reason makes a strong accent on concurrency initially. I was asked to create a load balancer with the production like code. You won't be given any requirements initially but only to implement the register method. Tried to clarify all the requirements ( target groups, healthchecks etc. ) From the interviwer answers I realized I shouldn't clarify requiments at this point. More requirements will be added added like capacity limitation and uniqueness check. why do you prefer register(String url) over register(URL url)? in what case the array list append won't be constant time? why it's not ready for prod ( concurrency ) what problems do you see? what's the simplest was to fix it? Didn't receive any feedback so it's hard to tell what was expected.
avatar

Senior Java Developer

Interviewed at Revolut

4
May 26, 2025

Company for some reason makes a strong accent on concurrency initially. I was asked to create a load balancer with the production like code. You won't be given any requirements initially but only to implement the register method. Tried to clarify all the requirements ( target groups, healthchecks etc. ) From the interviwer answers I realized I shouldn't clarify requiments at this point. More requirements will be added added like capacity limitation and uniqueness check. why do you prefer register(String url) over register(URL url)? in what case the array list append won't be constant time? why it's not ready for prod ( concurrency ) what problems do you see? what's the simplest was to fix it? Didn't receive any feedback so it's hard to tell what was expected.

Viewing 1341 - 1350 interview questions

Glassdoor has 29,166 interview questions and reports from Senior developer interviews. Prepare for your interview. Get hired. Love your job.