Blackrock Interview Experience (On Campus - Internships)
Interview Experience
BlackRock visited our campus and a total of 600 students applied for it.
Round 1 This was the online shortlisting round. There were 3 Sections and test was conducted on...
Full Details
BlackRock visited our campus and a total of 600 students applied for it.
Round 1 This was the online shortlisting round. There were 3 Sections and test was conducted on their proprietary software. These 3 Sections were 2 Technical aptitudes (Language-based,
output questions and SQL, database questions) and 1 normal aptitude round including Logical reasoning, attention to detail and other mathematical questions. This round was pretty difficult and the key was to not waste time on any particular question and just answer what might feel the most appropriate one. PS. You were not allowed to go back or change any submitted answer once you have attempted any question. After this round, 132 students were shortlisted for personal interviews.
Round 2 There was only one or two technical round based on how you will perform in your first one. Mine was a bit difficult as compared to others. Others were asked questions on OOPs and projects. The question asked of me were - Describe yourself - How does garbage collector work? - What does free/delete keyword do? - Write a program that creates a dangling pointer - Given three classes (A, B, C), write a code such that class C's object is only initiated once and others should have the same initiated object. (Ans. Singleton class) Then the interviewer asked me about my project and how did I come up with the idea. After that, she asked me whether I was comfortable with Data structures. I said yes and she asked the following questions. - Write a program that returns the maximum area of rectangle enclosed in a histogram. I gave an O(n)
solution using stacks. - Write a program that returns the maximum length of substring with no duplicate characters. (Ans. Use set or map for a O(n) solution) After this round, a total of 50 students were shortlisted for the HR round.
Round 3 This round was pretty easy, they were very frank and asked straightforward questions. - How was my day? - How was my college life? - Any suggestions on the interview process? - Do you have any questions for me? After this 25 students were given internship offers.
About This Question
This is a candidate experience report from a blackrock interview for a swe role (intern level) during the recruiter round reported in 2024.
It covers the following topics: Strings, Sql .
Difficulty rating: Easy
More BlackRock Interview Questions
About BlackRock Interview Reports
This question was reported by a candidate who interviewed at BlackRock. LeakCode aggregates interview reports from 10+ sources, including 1Point3Acres, Glassdoor, LeetCode Discuss, Blind, Reddit, Indeed, and Nowcoder. Each report is translated where necessary, deduplicated against existing entries, and tagged by company, role, round type, and reporting date.
Use this question as one calibration data point, not a memorization target. Companies typically rotate their question pools every 2-4 months; the exact wording of a 2024 question may differ from what you encounter today. The underlying pattern, difficulty level, and follow-up depth at BlackRock are the higher-signal extractions to take from this report.
For broader preparation context, the BlackRock interview process typically includes a recruiter screen, one or two technical phone screens, and a 4-5 round on-site loop covering coding, system design (at L4+ levels), and behavioral. Reports tagged on LeakCode show the round-by-round distribution and typical difficulty calibration. To browse questions filtered by round type and seniority, use the company hub linked above.
How To Practice This Type of Question
Solve similar problems on LeetCode under timed conditions (25-35 minutes per medium difficulty). The goal is pattern recognition: recognize the underlying technique (sliding window, two-pointer, BFS, memoized recursion, etc.) within 60-90 seconds of reading. Strong candidates verbalize their hypothesis out loud before coding, then iterate based on feedback. Weak candidates dive into implementation immediately, lose time on the wrong approach, and run out of time for follow-ups.
Companies update their question pools every 2-4 months. The exact wording of any given question may have been retired by the time you interview. Focus your prep on the pattern, not the specific problem. The patterns that appear in BlackRock reports consistently are the ones worth investing in; one-off niche problems are not.
During Your BlackRock Round
Apply the standard interview round template: clarify requirements (2-3 minutes), state your approach out loud and confirm direction with the interviewer (3-5 minutes), code with narration (15-25 minutes), test with concrete examples including edge cases (5 minutes), discuss optimization or trade-offs if time permits (5 minutes). This template is universally accepted across FAANG and adjacent companies; deviating from it produces weaker interviewer feedback signal.
The single most predictive failure mode in BlackRock reports tagged "no hire": not asking clarifying questions. Interviewers are explicitly trained to weight this. Strong candidates ask 3-5 clarifying questions even on problems that look obvious; weak candidates dive into code immediately. The clarifying-question check is often the first signal recorded in the interviewer's written notes.