RH - validação de experiência, background e informação de salário - Tech Challenge - Coding and questions - System Design - designing and streaming service and questions
Stakeholder - cultural
Proposing
Interview questions [1]
Question 1
7. Qual a desvantagem de usar segmentos (chunks) muito curtos no HLS?
Resposta: Aumento no overhead de requisições HTTP. Embora reduza a latência, o player precisa pedir novos arquivos com muito mais frequência, o que gera uma carga excessiva de processamento de metadados na rede e no servidor.
8. Por que usar UDP (via QUIC ou WebRTC) em vez de TCP para tempo real?
Resposta: Para evitar o Head-of-Line Blocking. O TCP garante a entrega de cada pacote e espera por retransmissões se algo falhar, o que causa "travamentos". No streaming em tempo real, é preferível perder um pequeno frame do que atrasar a transmissão inteira esperando um dado antigo.
9. Qual a função do Apache Kafka em um pipeline de ingestão?
Resposta: Desacoplamento e Resiliência. O Kafka atua como um buffer que recebe os fluxos de dados e permite que os serviços de transcoding e análise processem as tarefas de forma assíncrona, lidando melhor com picos repentinos de tráfego.
10. Diferença entre arquitetura "Push" e "Pull" na ingestão?
Resposta: * Push: O encoder envia (empurra) os dados ativamente para o servidor (ex: RTMP).
• Pull: O servidor de destino solicita e busca os dados da fonte original quando necessário (comum em redes de distribuição de conteúdo).
Gostaria que eu desenvolvesse um guia de estudo
The phone screen lasted about 30 minutes and began with general questions about my background before diving into technical topics. I was asked to solve a DSA question on finding the top K frequent elements, discussing both the min-heap and bucket-sort approaches. Surprisingly, I had recently practiced a similar problem on the algorithm section of PracHub, which helped me articulate my thought process clearly. The interview continued with an onsite where I tackled system design and behavioral questions, and overall, the experience was straightforward and positive, leading to an offer that I happily accepted.
Interview questions [1]
Question 1
Top K Frequent Elements: given an integer array and integer k, return the k most frequent elements. Walk through both the min-heap approach (O(n log k) time) and the bucket-sort approach (O(n) time), then discuss the trade-offs in time, space, and which one you'd pick for a streaming variant where new numbers keep arriving.
Surprisingly, the interview felt quite straightforward, especially for a senior role. I started with a technical screen, where I was asked to design an Uber Eats cart service. It caught me off guard initially, but then I remembered a specific mock I had practiced on PracHub that was nearly spot-on with this scenario. The final round included some behavioral questions, and although I received an offer, I ultimately decided to decline. Overall, it was a positive experience.
I applied online. I interviewed at Uber (Bengaluru)
Interview
Round 1 - Coding
Question: Count Rectangle-Line Intersections. Given a set of rectangles and a set of vertical line segments, count how many places the vertical lines intersect the rectangle edges (ignoring edge-on-edge overlaps).
Interview questions [1]
Question 1
Count Rectangle-Line Intersections. Given a set of rectangles and a set of vertical line segments, count how many places the vertical lines intersect the rectangle edges.