Q21. How would you decide whether to invest more in SEO or paid search?
I would not choose on gut feel. I would decide using payback, intent and time horizon. Paid search is fast and controllable but stops the moment spend stops. SEO compound...
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Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (329 available).
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Q22. Walk me through how you run a discovery call.
A discovery call is a structured conversation to understand whether there is a real problem worth solving, and to qualify the opportunity. I open with context and permiss...
Q23. What is the difference between unit, integration and end-to-end tests?
Unit tests exercise a single function, class or module in isolation, with dependencies replaced by fakes. They run in milliseconds, pinpoint failures and are cheap to wri...
Q24. How do window functions work and when do you use them?
Window functions compute a value across a set of rows related to the current row without collapsing them, unlike GROUP BY. They preserve row granularity. ```sql SELECT us...
Q25. What is the Central Limit Theorem and why does it matter?
The Central Limit Theorem says that the sampling distribution of the sample mean approaches a normal distribution as the sample size grows, regardless of the shape of the...
Q26. Explain Linux file permissions and chmod.
Linux permissions have three classes (user, group, other) and three bits each: read (4), write (2), and execute (1). - ls -l shows them as rwxr-xr--. The leading characte...
Q27. What is the difference between continuous delivery and continuous deployment?
Both build on continuous integration, but they differ in what reaches production. - Continuous delivery: every change that passes automated tests is always in a deployabl...
Q28. Session-based versus token-based authentication: what are the trade-offs?
Session-based authentication stores session state on the server and gives the client an opaque session identifier in a cookie. It is easy to revoke (delete the session), ...
Q29. Explain Kafka topics, partitions and offsets.
A topic is a named stream of records. It is split into partitions, which are the unit of ordering, parallelism and replication. Records within a partition are strictly or...
Q30. What is the difference between a query, a mutation and a subscription?
- Query: a read operation. Queries can run in parallel and must be side-effect free. - Mutation: a write operation that changes server state. Top-level mutation fields ru...