Deloitte prep

Deloitte Mid-level (3–5 years) Technical deep dive

#16

How do you manage secrets safely in CI/CD pipelines? — Deloitte interview

Reported in Deloitte interview loops. Security-focused DevOps interview question for pipeline hardening.

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Deloitte Mid-level (3–5 years) Technical deep dive

#17

Design a parking lot system using OOD principles — Deloitte interview

Reported in Deloitte interview loops. Object-oriented design classic testing modeling and extensibility.

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Deloitte Mid-level (3–5 years) Technical deep dive

#18

How do SOLID principles help in real-world codebases? — Deloitte interview

Reported in Deloitte interview loops. OOD theory-to-practice question for maintainability.

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Deloitte Mid-level (3–5 years) Technical deep dive

#19

When would you use useState versus useReducer in React? — Deloitte interview

Reported in Deloitte interview loops. React hooks question on local state complexity and predictable updates.

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Deloitte Mid-level (3–5 years) Technical deep dive

#20

How does Node.js handle concurrent requests with a single thread? — Deloitte interview

Reported in Deloitte interview loops. Node.js architecture question on libuv, event loop phases, and worker threads.

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Deloitte Mid-level (3–5 years) Technical deep dive

#21

Compare ACID and BASE consistency models in databases — Deloitte interview

Reported in Deloitte interview loops. Distributed data question bridging SQL transactions and NoSQL eventual consistency.

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Deloitte Mid-level (3–5 years) Behavioral

#22

Tell me about a project that failed or missed its deadline. What did you learn? — Deloitte interview

Reported in Deloitte interview loops. Behavioral question testing accountability, retrospectives, and growth.

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Deloitte Mid-level (3–5 years) Technical deep dive

#23

How do you version a public API without breaking clients? — Deloitte interview

Reported in Deloitte interview loops. API evolution question covering compatibility, deprecation, and communication.

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Deloitte Mid-level (3–5 years) Technical deep dive

#24

What is dependency injection and why is it useful? — Deloitte interview

Reported in Deloitte interview loops. Java/Spring staple connecting OOP design to testable service architecture.

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Deloitte Mid-level (3–5 years) Coding / DSA

#25

How do you perform topological sort on a directed acyclic graph? — Deloitte interview

Reported in Deloitte interview loops. Graph algorithm for task scheduling, build systems, and course prerequisites.

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Deloitte Mid-level (3–5 years) Coding / DSA

#26

How many distinct ways can you climb n stairs taking 1 or 2 steps at a time? — Deloitte interview

Reported in Deloitte interview loops. Introductory dynamic programming problem isomorphic to Fibonacci.

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Deloitte Mid-level (3–5 years) Coding / DSA

#27

Design and implement an LRU cache with O(1) get and put — Deloitte interview

Reported in Deloitte interview loops. Hash map plus doubly linked list problem bridging DSA and system components.

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Deloitte Mid-level (3–5 years) Coding / DSA

#28

Solve the 0/1 knapsack problem with dynamic programming — Deloitte interview

Reported in Deloitte interview loops. Classic DP testing tabulation, space optimization, and item selection reconstruction.

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Deloitte Mid-level (3–5 years) Coding / DSA

#29

Explain and implement Dijkstra's algorithm for shortest paths — Deloitte interview

Reported in Deloitte interview loops. Graph algorithm for non-negative edge weights using priority queue.

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Deloitte Mid-level (3–5 years) System design

#30

Design a URL shortening service — Deloitte interview

Reported in Deloitte interview loops. Foundational system design covering APIs, encoding, storage, and read-heavy scaling.

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