Accenture Interview Questions That Actually Matter (2026)

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Hash table gives O(1) average lookup. BST gives O(log n) lookup but maintains sorted order. Use hash table when order does not matter, BST when you need sorted traversal.

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Model handles data, View handles display, Controller handles logic. Use a web application example. Mention why separation of concerns makes code maintainable.

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Synchronous blocks execution until complete. Asynchronous allows other code to run while waiting. Use a real-world analogy: synchronous is like waiting in a queue, asynchronous is like ordering food and doing something else while it is prepared.

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REST is stateless, uses HTTP methods (GET, POST, PUT, DELETE), and returns data in JSON or XML. Mention the 6 REST constraints: stateless, client-server, cacheable, uniform interface, layered system, code on demand.

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An index speeds up data retrieval at the cost of additional storage and slower writes. It works like a book index. Mention B-tree indexes as the most common type.

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Shallow copy copies references to objects. Deep copy creates new copies of all nested objects. Changing a nested object in a shallow copy affects the original.

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A closure is a function that remembers the variables from its outer scope even after the outer function has returned. Use a counter example to illustrate.

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Multithreading allows multiple threads to run concurrently within a process. Benefits: better CPU utilization, faster execution for parallel tasks. Mention thread safety and race conditions as challenges.

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Accenture HR interviewers pay close attention to how you communicate. Structure your answer clearly: education, projects, skills, and why Accenture. Speak confidently and avoid filler words.

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Mention Accenture's focus on digital transformation, its global client base, and the opportunity to work on cutting-edge projects. Be specific about what differentiates Accenture from TCS or Infosys in your view.

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Accenture works on complex client projects where requirements are not always clear. Show that you can ask the right questions, make reasonable assumptions, and deliver despite uncertainty.

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Align your answer with Accenture's culture: collaborative, fast-paced, and client-focused. Show that you are comfortable with change and variety.

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Mention Accenture's main service lines: Strategy and Consulting, Technology, Operations, and Song (formerly Interactive). Show that you have done basic research.

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Accenture values adaptability. Pick an example where you had to change your approach mid-project. Focus on how you handled the change, not on how disruptive it was.

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This tests your communication and persuasion skills. Use a team project example where you convinced others to adopt your approach.

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Pick a real example. Show initiative and ownership. Quantify the impact if possible.

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Describe your actual learning process: documentation, tutorials, building a small project. Show that you are self-directed and practical.

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Use the sum formula: n*(n+1)/2 minus the sum of the array. O(n) time, O(1) space.

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Use one stack for enqueue and one for dequeue. When the dequeue stack is empty, transfer all elements from the enqueue stack.

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Sort the array and compare the first and last strings character by character. The common prefix of these two is the answer.

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Reverse the entire array, then reverse the first k elements, then reverse the remaining elements. O(n) time, O(1) space.