IT services & consulting interview prep
TCS, Infosys, Accenture and Deloitte hire at a volume that shapes everything about their process. Where big tech optimises to avoid a bad hire, high-volume hiring optimises to process thousands of candidates consistently and fairly. That produces a different interview, and preparing for it like a FAANG loop is the common and expensive mistake.
Jump to: TCS · Infosys · Accenture · Deloitte
🎤 Run a mock interview free →What preparation actually looks like here
An aptitude or online test usually gates everything
Quantitative aptitude, logical reasoning, verbal ability, often with sectional cut-offs and negative marking. This filter is mechanical: miss the cut-off and no human ever reads your CV, however strong it is. It is also the most improvable part of the entire process, because it is a known, finite syllabus — and it is the part candidates most often skip preparing because it feels beneath them.
Fundamentals beat algorithmic gymnastics
You are far more likely to be asked to explain normalisation, OOP concepts, the difference between an interface and an abstract class, or to write a straightforward SQL join, than to solve a dynamic-programming puzzle. Depth on the basics of one language, plus databases and OS concepts, outperforms a hundred LeetCode problems here.
The HR round is a real filter, not a formality
Candidates coast into it assuming it is a rubber stamp. It is where offers are lost — on notice period, relocation flexibility, willingness to work in a technology you did not choose, and a coherent answer to why this company. Treat it as an interview with its own preparation.
Communication is assessed continuously, for a concrete reason
Much of this work is client-facing, often across time zones. Clear, unhurried English and the ability to explain something technical to a non-technical listener are scored throughout, not just in the HR round.
Project explanation is the round you can most easily win
You will be asked to walk through a project — academic ones count. Have one you can explain in three minutes: the problem, your specific contribution, the technology and why you chose it, what broke, and what you would do differently. Most candidates narrate features. Being the one who explains a decision and a trade-off is a strong and cheap differentiator.
The order that works: aptitude first (it gates everything and improves fastest), then fundamentals, then one project you can explain in your sleep, then the HR answers written out. Reversing that order is how strong candidates fail these processes.
Company by company
TCS
TCS (and similar India IT services) interviews typically include an aptitude/coding test, a technical round on fundamentals, and an HR round on fit and flexibility.
The process
- ›Online test (aptitude + coding)
- ›Technical interview (CS fundamentals, projects)
- ›HR interview (relocation, shifts, salary)
Question types
- ✓CS fundamentals (DBMS, OOP, OS, one language)
- ✓Project deep-dive
- ✓HR / work-authorization & flexibility
How to prepare
- 💡Be solid on fundamentals — DBMS, OOP, data structures.
- 💡Know your projects deeply; expect 'why did you choose X?'
- 💡For HR, be clear and honest about relocation, notice period and shift flexibility.
Infosys
Infosys hiring emphasizes technical fundamentals, SQL/database knowledge, and clear problem-solving. The process is structured: aptitude/written test, coding, technical interview, and an HR round; communication and clarity matter.
The process
- ›Aptitude test (logical, coding MCQ, English)
- ›Coding round (1-2 problems on an online judge)
- ›Technical interview (DSA, databases, system basics)
- ›HR round (fit, behavioral, expectations)
Question types
- ✓Coding (arrays, strings, sorting — with optimization)
- ✓SQL (joins, subqueries, database design)
- ✓Fundamentals (data structures, complexity, architecture)
- ✓Behavioral (teamwork, learning mindset)
How to prepare
- 💡Nail DS/Algo fundamentals with medium-hard practice.
- 💡Write efficient SQL and understand indexing.
- 💡Think aloud — interviewers value your explanation of the logic.
Accenture
Accenture interviews balance technical capability, a consulting mindset, and client communication. Expect case-study analysis, coding, and behavioral questions on collaboration and adaptability in client-facing work.
The process
- ›Online aptitude test (numerical, logical, verbal)
- ›Technical assessment (coding or domain tech)
- ›Case / problem-solving round
- ›Behavioral interview (adaptability, collaboration)
Question types
- ✓Coding (medium, practical scenarios)
- ✓Case studies (analyze a business problem, propose a solution)
- ✓Domain (cloud, data, DevOps depending on role)
- ✓Behavioral (client-facing mindset, communication)
How to prepare
- 💡Practice case thinking — frame technical choices as business trade-offs.
- 💡Show a consulting mindset (cost, speed, risk).
- 💡Prepare to explain a technical constraint to a non-technical stakeholder.
Deloitte
Deloitte interviews assess consulting capability, analytical rigor, and business acumen. Candidates see case studies, quantitative analysis, and behavioral questions emphasizing client impact and communication.
The process
- ›Written test (quantitative, business sense)
- ›Case interview 1 (analysis + recommendation)
- ›Case interview 2 (deeper dive)
- ›Functional assessment (finance, data, or tech)
- ›Partner / leadership round
Question types
- ✓Case studies (market, profitability, M&A)
- ✓Quantitative analysis (ROI, modeling, trends)
- ✓Business acumen (industry + competitive dynamics)
- ✓Behavioral (leadership, client focus, integrity)
How to prepare
- 💡Master a case framework: clarify problem, structure hypotheses, analyze, recommend.
- 💡Practice quantitative rigor (modeling, sensitivity).
- 💡Frame every recommendation through the client's most pressing issue.
Based on publicly documented formats; interviews change over time. This is preparation guidance, not leaked questions.