Uber Interview Question for Software Developers


Country: United States
Interview Type: In-Person




Comment hidden because of low score. Click to expand.
0
of 0 vote

Twitter feeds API for 1 user: The user has M friends and each friend has K new updates. One possible way is to iterate over all friends and get all the new updates and display that in feed. O(MK). But iterating over all the friends is a costly operation, so i should be getting the feeds from those people whose pics and feeds i like or comment on or share. We have reduced the iteration on number of people. We can also use collaborative filtering to decide - what kind of feeds i would be interested in. Instead of doing all the computations on the fly, some things can be done offline - for example, store latest feeds from my friends after I was last active and when i come online, show those in chronological order.

Connect to Twitter API: Whenever a person gives her credentials that means one connection is awarded to her. Now if multiple connections are opened for the same user then according to 'last used' parameter certain connections can be closed. Also if the user exceeds the limit of number of connections allowed then old connections should be closed.

Twitter uses streaming API. I am not sure about twitter trends though. Can someone elaborate on that?

- Astha June 05, 2016 | Flag Reply


Add a Comment
Name:

Writing Code? Surround your code with {{{ and }}} to preserve whitespace.

Books

is a comprehensive book on getting a job at a top tech company, while focuses on dev interviews and does this for PMs.

Learn More

Videos

CareerCup's interview videos give you a real-life look at technical interviews. In these unscripted videos, watch how other candidates handle tough questions and how the interviewer thinks about their performance.

Learn More

Resume Review

Most engineers make critical mistakes on their resumes -- we can fix your resume with our custom resume review service. And, we use fellow engineers as our resume reviewers, so you can be sure that we "get" what you're saying.

Learn More

Mock Interviews

Our Mock Interviews will be conducted "in character" just like a real interview, and can focus on whatever topics you want. All our interviewers have worked for Microsoft, Google or Amazon, you know you'll get a true-to-life experience.

Learn More