Graviton Research Capital

1. 1

   Online test

   Online assessment: MCQs plus two coding questions
   HackerRank60 min12 questionseasyeliminatory

   Section	Qs	Min	Topics
   MCQ	10	15	OOP, probability, OS
   Coding	2	40	strings, binary search, greedy, sorting

   OOP · probability · OS · strings · binary search · greedy

   Sections are timed separately (MCQ 15 or 20 min, coding 40 or 45 min) and cannot be reopened after submit. MCQs described as fairly simple. About 12 candidates shortlisted. Partial test-case scoring rewards brute force.

2. 2

   Technical interview

   Round 1: resume discussion and DSA
   60 minofflineeliminatory

   project deep dive · sorting · prefix sums · binary search · greedy · bloom filters

   Length 45 to 60 min across accounts. Same memory-freeing problem was reported by all three candidates.

3. 3

   Technical interview

   Round 2: system design and DSA or resume
   60 minofflineeliminatory

   file system design · autocomplete with tries · symlinks · palindrome partitioning · kernel-bypass networking project · failure cases

   One candidate skipped this round and went straight to round 3. Interviewer sometimes asks candidates to wait in the room, which signals another round.

4. 4

   Managerial interview

   Round 3: team lead discussion
   25 minonline

   CPI and JEE rank · Codeforces rating · unordered_map vs map · hash collisions · AVL rotations · order books · why this firm

   Length 20-30 min across accounts.

5. 5

   HR interview

   Round 4: head of HR
   20 minonline

   motivation · strengths and weaknesses · location preference

   Length 15-30 min across accounts. Largely a conversation about interest and fit.

Advice from candidates

74 pieces of advice, in their own words. Names removed.

• Be thorough with your resume, know your projects. Have clear fundamentals of DSA concepts, questions won’t be too difficult but be prepared. Basic probability and statistics. Revise permutations and combinations a day before. Go through some famous riddles and puzzles on gfg.

  preparation · 2022-23

• Being good at coding in python is preferable but to be honest, if you are not good at python then tell them which other language you prefer and try to do coding questions in that language. They will select based on your aptitude.

  interview · 2022-23

• First, review coding fundamentals and practice exercises to strengthen your problem-solving skills for your understanding of efficient solutions. Brush up your DSA concepts. Study relevant math principles such as number theory, discrete math and basic probability to approach puzzles with a logical mindset. Solve different types of puzzles to sharpen your problem-solving abilities.

  preparation · 2022-23

• During the interview, communicate effectively by explaining your thought process and seeking clarification when needed. Showcase enthusiasm and ask questions will help the interviewer to understand your approach and he/she might help you reach the solution as well.

  interview · 2022-23

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Question patterns reported

The kind of problem, not the problem itself. Our practice questions are written to match these patterns.

• Technicalprint a slash-based pattern from given inputs
• Technicalbasic SQL and Pandas questions
• Technicalminimum races to find top three of 25 items
• Technicalways to climb steps with 1 or 2 jumps
• Technicallattice paths from origin to (n,n)
• Technicalfind heavier person with balance puzzle
• Technicalpoison and test subjects riddle
• Technicalclassic interview puzzles from public top-100 lists
• Technicalscenario SQL query with follow-ups raising complexity
• Technicaln people in a circle, eliminate every k-th, find survivor
• OnlineDP question, LeetCode medium level
• Technicalfind repeated element in array, build from quadratic to XOR
• Technicalprobability puzzle solved via area under graph
• Technicalmulti-step queries needing substring and conditional logic
• Technical4-5 non-trivial SQL queries on a given table
• Technicalcourse scheduling with prerequisites
• Technicalarrange numbers to form largest value
• Codingstring manipulation, easy
• CodingDP, medium
• Technical8-10 quant puzzle-style questions, mostly hard
• Technicalaggregate per-event spreadsheet rows into a final scoreboard
• Onlineassign contiguous seat blocks to groups to maximise seat value, few groups
• Onlineremove one point to minimise max Manhattan distance, brute force passes
• Technicalshortest path between two routers, follow-up forwarding only to nearest neighbours