Interview preparation

CI&T interview process & preparation

CI&T currently has 4+ live openings on OnJob.io, concentrated in .NET Developer and Data Analyst roles. There are no leaked or company-specific questions here — instead, prepare with the general, role-based interview rounds and most-asked questions for those role types below, then practise them free with OnJob's AI mock interview.

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Honest note: OnJob.io does not publish leaked or company-confidential interview questions. The guides below are general, role-based preparation — the standard rounds and commonly-asked questions for the role types CI&T is currently hiring for. Use them to prepare; your real CI&T interview may differ.

What to expect when interviewing for .NET Developer and Data Analyst roles at companies like CI&T

CI&T is currently advertising these role types on OnJob.io. Each guide is the general interview structure and most-asked questions for that role — prepare with it, then rehearse free with the AI mock interview.

General .NET Developer interview prep

2 live roles at CI&T

C#, ASP.NET Core and SQL Server — the enterprise backend interview favoured by GCCs, banking, insurance and Microsoft-stack services firms across India.

Typical .NET Developer interview rounds

  1. 1 C# / OOP fundamentals. Language features, OOP principles, value vs reference types, collections and LINQ.
  2. 2 ASP.NET Core round. Web API design, middleware pipeline, dependency injection and Entity Framework.
  3. 3 Database & SQL Server. Schema design, stored procedures, indexing and query tuning.
  4. 4 System design / project deep-dive. Designing a scalable service and discussing your past .NET projects.

Commonly-asked .NET Developer questions

  • What is the difference between value types and reference types in C#?
  • Explain the difference between an abstract class and an interface in C#.
  • What is the difference between IEnumerable, ICollection and IList?
  • What are async and await, and how do they work in C#?
  • Explain the difference between .NET Framework, .NET Core and .NET 5+.
  • What is dependency injection and how does ASP.NET Core support it out of the box?
  • Explain the request middleware pipeline in ASP.NET Core.
  • What is the difference between String and StringBuilder?
Full .NET Developer prep AI mock interview

General Data Analyst interview prep

1 live role at CI&T

SQL, Excel, statistics and storytelling with data — the analyst interview for product, BI and analytics teams across India.

Typical Data Analyst interview rounds

  1. 1 SQL round. Joins, aggregations, window functions and query writing.
  2. 2 Excel / spreadsheet round. Lookups, pivot tables and formulas.
  3. 3 Case / analytics round. Business case: define metrics, analyse and recommend.
  4. 4 Tool & viz round. Power BI / Tableau dashboards and stakeholder communication.

Commonly-asked Data Analyst questions

  • What is the difference between INNER JOIN, LEFT JOIN and FULL OUTER JOIN?
  • Write a SQL query to find the second-highest salary in a table.
  • What is the difference between WHERE and HAVING?
  • Explain window functions like ROW_NUMBER(), RANK() and DENSE_RANK().
  • What is the difference between mean, median and mode, and when is each misleading?
  • How do you handle missing or null values in a dataset?
  • Explain the difference between a primary key and a foreign key.
  • What is normalisation, and why does it matter for analysis?
Full Data Analyst prep AI mock interview

Rehearse your CI&T interview, free

Run a realistic AI mock interview for your target role and get instant feedback on your answers — or take a timed mock test to check your fundamentals before the real thing.

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CI&T interview — FAQs

How do I prepare for a CI&T interview?

Prepare by role: identify the role you're applying for, then practise the standard interview rounds and most-asked questions for that role type. CI&T is currently hiring for .NET Developer and Data Analyst roles, so focus there. Use OnJob's free AI mock interview to rehearse with instant feedback, and review the role-specific question lists below. These are general role-based questions, not leaked CI&T questions.

What questions are asked in a CI&T interview?

We don't publish leaked or company-specific CI&T questions. What we do provide is the general, frequently-asked interview questions for the role types CI&T hires for — such as .NET Developer and Data Analyst roles. For example, .NET Developer interviews commonly cover: What is the difference between value types and reference types in C#? Explain the difference between an abstract class and an interface in C#. What is the difference between IEnumerable, ICollection and IList? Prepare with these general questions and OnJob's free AI mock interview.

How many rounds does a CI&T interview have?

It depends on the role. A typical .NET Developer interview runs across 4 rounds — C# / OOP fundamentals, ASP.NET Core round, Database & SQL Server, System design / project deep-dive. Round counts vary by company and seniority; treat this as the general structure to prepare for, not a guarantee of CI&T's exact process.

Is CI&T hiring right now?

Yes — CI&T has 4+ live openings on OnJob.io, refreshed daily, mostly for .NET Developer and Data Analyst roles. Browse the live CI&T jobs and see your AI match score on each before you apply.

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