LinkedIn Three Round Interview Summary
Phone Interview
First of all, I introduced myself and asked some BQs: What should I do if I have a difference of opinion with the manager or PM? I also asked a few easy and medium questions.
Business case
The second round is Business case (1 general case 1 A/B testing) and sql business case: number of job applications shas dropped by 10% in a particular week how will you investigate this issue? After eliminating seasonality, we will start with the tunnel analysis.
Coding
The third round is Coding, Write-through cache vs Write-back cache Write-through cache: write operations are directly written to cache and main memory. Write-back cache: write operations are first written to the cache, delayed write to the main memory, write operations become more efficient warm-up knowledge points.
Unique ptr vs shared ptr Unique ptr: a smart pointer with exclusive ownership that cannot be copied. shared ptr: multiple pointers can share the same block of memory, using reference counting to manage memory release.
Rank based cache Need to implement a cache that stores and retrieves data based on the rank of the key . follow-up: how to handle concurrent accesses? How to handle ranking updates for keys?
Word Search variant: searches for words using combinations of phone key digits mapped to letters.
Input: a string of numbers and a list of known words Output: a list of matching words left for from zero.
Getting on board with LinkedIn
From UPenn Penn students, the beginning of their own alternative way to set in a non-FAANG company data post, so we in addition to Linkedin these companies, but also very chicken blood to encourage students to go to small and fine tech companies or finance industry companies, sometimes like some of the fintech company data post is also a very good choice. First of all, the TA's technology is very hard, very over the top, but a round of interviews always pass, we helped him summarize the main efforts after behaviorals, December before and after mock 20 + times, plus everyone'sInterview assistanceWouldn't it stand to reason that and substitute interviewing services.
