How Indian companies use HackerRank, Codility and similar coding tests

Which platform will you actually get?

The honest answer is: whichever one your employer licensed. We searched for official hiring pages of large Indian IT employers and did not find one that names its test vendor. Sources that do mention platforms are mostly third-party prep sites, so treat claims like "TCS uses X" with caution. The HackerEarth website, for example, publishes a case study about a national coding challenge run on its platform (the Big Code), which drew tens of thousands of participants from IITs, NITs, IIITs and DTU. That tells you HackerEarth is used for large-scale Indian student hiring events; it does not tell you which employers use which vendor.

For HackerRank and Codility specifically, the platform-level rules are documented in our existing guides: what to expect on HackerRank and what to expect on Codility. For Mettl, HackerEarth and AMCAT see this guide. This article does not repeat them; it focuses on how Indian hiring drives use such tests and what goes wrong.

The typical funnel in India

HackerEarth's case study (a third-party vendor page, not an employer) describes this structure for a national challenge: an open registration, a qualifying round mixing MCQs and coding tasks, an algorithmic round on computer science fundamentals, an advanced coding assessment, then a hackathon and a live panel. The funnel narrowed from 15,000 qualifiers to 1,500 advanced coders to 50 finalists to 15 presenters.

Employer drives are different in size but similar in shape. Capgemini India, for example, lists for freshers an online aptitude test, then a coding or technical assessment, then interviews (see our Infosys, Cognizant and Capgemini guide). The pattern is: a cheap automated filter first, people later. That is why passing the test matters more than it feels like it should.

What the platforms say about the test experience

From HackerRank's help-centre articles (checked 13 November 2026):

• Candidates should "make sure you have a stable internet connection for the duration of your challenge".
• For proctored tests, "sit in a well-lit area and face straight at the camera".
• The timer "cannot be paused" once started, and candidates should log in "at least a few minutes before the test expiration time".
• "Candidates can find the sample test on their login page."

These articles are written for recruiters, who share the advice with candidates, so what you actually see depends on the employer. The practical takeaways are the same in any vendor: do the sample test, check the connection, and log in early.

Common mistakes in Indian coding tests

These come from how timed auto-graded tests work in general, not from any specific employer, so use them as a checklist rather than as a claim about one company.

1. Skipping the sample test. The input and output format surprises people. Reading from standard input and printing in exactly the requested format is a skill; practise it on the sample.
2. Solving for the visible example only. Auto-graders run hidden test cases including edge cases: empty input, a single element, maximum size, duplicates, negative numbers.
3. Ignoring constraints. If N goes to 10⁵ an O(N²) loop will time out. Read the limits first and pick the algorithm that fits.
4. Spending the whole time on the hardest question. Submit partial solutions on each problem early, then improve.
5. Unfamiliar language. Use the language you have actually practised under time pressure, and know its input functions.
6. Not saving and submitting. Run against the sample, submit, and confirm the submission registered before time ends.
7. Weak connection or power. A dropped connection or a power cut can end an attempt. Test from a stable place and have a backup (for example a phone hotspot) ready, and read your invitation for what happens if you disconnect.
8. Copying code. HackerEarth's case study says tie-breaks were resolved on "completion time and plagiarism percentage". Similarity checking is part of how such events rank people. Write your own solution.

A simple 3-week preparation plan

• Week 1, fundamentals: arrays, strings, hash maps, sorting, two pointers. Ten problems at easy level, each solved with a timer.
• Week 2, patterns: recursion, basic dynamic programming, graphs with BFS and DFS, binary search on the answer. Read the constraints before coding every time.
• Week 3, simulation: full timed mocks in the same language and, if known, on the platform's sample test. After each mock, write down why each missed case failed.

For SQL sections, practise joins and group-by on two tables. For aptitude sections, practise under the clock; speed matters more than depth.

Rules, proctoring and AI tools

Tests on these platforms may be proctored, record your session or compare code between candidates; the exact settings are chosen by the employer. Our guides can HackerRank detect AI and can Codility detect AI explain what those vendors publish. Do not use outside help in a test whose rules forbid it, and do not ask for ways around proctoring: the consequences are disqualification and, if found later, a withdrawn offer.

Use tools where it is legitimate: practice. Interview Copilot is a desktop overlay that listens to system audio and can solve a coding problem from a screenshot; its free plan works without a card, which is enough to rehearse with. For live interviews and assessments, ask the recruiter what is permitted before you begin. For the technical detail on screen capture, see invisible interview assistant.

Sources

• HackerRank knowledge base: Onboarding candidates
• HackerEarth: campus hiring at national scale (vendor case study)
• Capgemini India: recruitment process

Checked 13 November 2026. We could not find official pages from Indian employers naming their assessment vendor; that is not confirmed.

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