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Blackrock Software Engineer Interview Questions and Answers

Updated 5 Nov 2024

Blackrock Software Engineer Interview Experiences

3 interviews found

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(2 Questions)

  • Q1. Asked everything that was present in my resume
  • Q2. DBMS, OOps were asked a lot and react as well
Interview experience
2
Poor
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in May 2024. There were 2 interview rounds.

Round 1 - Aptitude Test 

60 mins and basic quants-based questions along with SQL

Round 2 - Technical 

(2 Questions)

  • Q1. Multi-Threading in Python - GIL
  • Ans. 

    Global Interpreter Lock (GIL) in Python restricts execution of multiple threads at once to prevent race conditions.

    • GIL is a mutex that protects access to Python objects, preventing multiple threads from executing Python bytecodes at once.

    • This means that even in a multi-threaded Python program, only one thread can execute Python code at a time.

    • GIL can limit the performance of multi-threaded Python programs, especially f...

  • Answered by AI
  • Q2. Certifications in my resume - AWS and Ethical Hacking

Interview Preparation Tips

Interview preparation tips for other job seekers - Through your resume well and don't falsify your skills

Skills evaluated in this interview

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Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-

I applied via Campus Placement

Round 1 - Coding Test 

They asked you to reverse a palidrome

Interview Preparation Tips

Interview preparation tips for other job seekers - Good place

Interview questions from similar companies

Interview Questionnaire 

1 Question

  • Q1. Java basics

I applied via LinkedIn and was interviewed in Nov 2020. There was 1 interview round.

Interview Questionnaire 

2 Questions

  • Q1. Basic OOPS concepts?
  • Q2. Logical Coding like remove duplicates from array

Interview Preparation Tips

Interview preparation tips for other job seekers - Focus on your basic OOPS concepts

I applied via Company Website and was interviewed before Nov 2020. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. How do you handle downtime
  • Ans. 

    I prioritize identifying the root cause and finding a solution while keeping stakeholders informed.

    • Identify the root cause of the downtime

    • Communicate with stakeholders about the issue and expected resolution time

    • Work on finding a solution as quickly as possible

    • Implement preventative measures to avoid future downtime

    • Document the incident and steps taken for future reference

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Because confident and prepare well for versant test

Interview Preparation Tips

Round: Test
Experience: 7 CGPA cut off, The First round was an Aptitude test (quant+DI+verbal ) 20 questions + 10 basic C/C+ questions
Total Questions: 30

Round: Other Interview
Experience: Second Stage: 2 rounds Tech interview + 1 HR, Very casual personal interview with questions based on resume onlyNo core coding questions since I was from ECE but for Comps/IT they expect knowledge in DBMS.Some finance questions like what are stocks/shares, mutual funds etc. I was asked more detailed finance questions also since I had mentioned my finance interns.

Skill Tips: Be thorough with apti tests . Past CAT papers are ideal as they cover all aspects  (quant+Data Interpretation +Logical reasoning +verbal ) For learning finance jargon use Economist A-Z list and Investopedia
Skills: quant, Data Interpretation , Logical reasoning
College Name: NIT SURATHKAL

Interview Questionnaire 

4 Questions

  • Q1. Tell me about your internship, B.Tech project(BTP), CV
  • Q2. Implement LRU cache.
  • Ans. 

    Implement LRU cache

    • LRU stands for Least Recently Used

    • It is a cache eviction policy that removes the least recently used item

    • It can be implemented using a doubly linked list and a hash map

    • Newly accessed items are moved to the front of the list

    • When the cache is full, the item at the end of the list is removed

  • Answered by AI
  • Q3. What is virtual memory? Will we need virtual memory even if we have infinite amount of RAM?
  • Ans. 

    Virtual memory is a memory management technique that allows a computer to use more memory than it physically has.

    • Virtual memory uses a combination of RAM and hard disk space to store data.

    • It allows programs to use more memory than is physically available.

    • If a program tries to access memory that is not currently in RAM, it will be swapped in from the hard disk.

    • Even if we had infinite RAM, virtual memory would still be n...

  • Answered by AI
  • Q4. Given an array, Find out maximum length of subarray where max of subarray <= 2*min of subarray
  • Ans. 

    Find maximum length of subarray where max <= 2*min.

    • Iterate through array and keep track of max and min values.

    • Update max length when condition is met.

    • Time complexity: O(n)

  • Answered by AI

Interview Preparation Tips

Round: Resume Shortlist
Experience: No CPI cut off and It was open for all departments.

Round: Test
Experience: In muliple choice question Mostly questions were base on maths, probability, c programs, algorithms, Systems. If you are prepared then Questions were not that much tough. Keep strong concepts of Operating systems. For subjective part, Some problems were from maths proofs, some were from probability, some were from algo. We had to write algorithms. etc
Duration: 180 minutes

Round: Problem Statement
Experience: Questions were doable.

Round: Interview
Experience: Everyone was cool, They made me feel comfortable and then started asking questions.
Tips: If you have good rank in online coding competition, do mention it in CV.Most of the students think that GS asks only probability-puzzles. They did not asked me any question on probability or puzzle. Everything they asked was based on Algorithms problems and Operating system. I think it depends on team for which they are hiring. Most important point is don’t lose hope because you have low CPI or you are not good at something. Keep Operating systems fundamental concepts strong.

General Tips: We should balance in Placement and Compititive online coding. Keep in mind Placements and Compititive online coding are some what different things. Keep on improving our mistakes on daily basis. I would strongly suggest you to do introspection daily it will help you to find out your weaknesses and strong points, where we are going wrong etc. There are two thing on which we shoud focus.1. Preparation (I have told everything requered for preparation).2. Get output of all hard work. How to keep our mind on 100% output while the actual exam(placement).For this, I used to go for physical exercise daily in the morning and medidate for 20-30 minutes. Along with exercise i used to do Sudarshan Kriya(Art of Living). Meditation has lot of power :).
Skill Tips: Keep your OS fundamentals strong. To improve codgin skills practice as many problems as you can. Regularly participate in online coding competitions it really helps to solve or approach any new problem. Many time instead of correct answer the approach to solve the problems is very important. How you think, How you approach the problem is checked in interview.
Skills: Coding Skills, Operating Systems , Problem solving skills
College Name: IIT Guwahati
Motivation: The name GS itself enogh for motivation.

Skills evaluated in this interview

I was interviewed before Mar 2021.

Round 1 - Face to Face 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Medium

Technical round with questions on DSA and OS.

  • Q1. 

    LRU Cache Design Problem Statement

    Design and implement a data structure for a Least Recently Used (LRU) cache that supports the following operations:

    • get(key) - Retrieve the value associated with the...
  • Ans. 

    Design and implement a Least Recently Used (LRU) cache data structure that supports get and put operations with a specified capacity.

    • Implement a doubly linked list to keep track of the order of keys based on their usage.

    • Use a hashmap to store key-value pairs for quick access and updates.

    • When a key is accessed or updated, move it to the front of the linked list to mark it as the most recently used.

    • When the cache reaches...

  • Answered by AI
  • Q2. 

    Maximum of All Subarrays of Size K

    Given an array of non-negative integers and an integer K representing the length of a subarray, your task is to determine the maximum elements for each subarray of size ...

  • Ans. 

    Find the maximum elements for each subarray of size K in a given array.

    • Iterate through the array and maintain a deque to store the indices of elements in decreasing order.

    • Pop elements from the deque that are out of the current window.

    • Keep track of the maximum element in each subarray of size K.

    • Return the maximum elements for each subarray.

  • Answered by AI
  • Q3. What is virtual memory?
  • Ans. 

    Virtual memory is a memory management technique that allows a computer to compensate for physical memory shortages by temporarily transferring data from RAM to disk storage.

    • Virtual memory allows programs to use more memory than is physically available on the system.

    • It helps in multitasking by allowing multiple programs to run simultaneously without running out of memory.

    • Virtual memory uses a combination of RAM and disk...

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAGoldman Sachs interview preparation:Topics to prepare for the interview - Coding Skills, Operating Systems , Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 5 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewRejected

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
Easy
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Containerized pipelines
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Blackrock Interview FAQs

How many rounds are there in Blackrock Software Engineer interview?
Blackrock interview process usually has 1-2 rounds. The most common rounds in the Blackrock interview process are Aptitude Test, Technical and One-on-one Round.
How to prepare for Blackrock Software Engineer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Blackrock. The most common topics and skills that interviewers at Blackrock expect are Computer science, SDLC, Agile, C++ and Coding.
What are the top questions asked in Blackrock Software Engineer interview?

Some of the top questions asked at the Blackrock Software Engineer interview -

  1. Multi-Threading in Python - ...read more
  2. DBMS, OOps were asked a lot and react as w...read more

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Blackrock Software Engineer Interview Process

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Blackrock Software Engineer Salary
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3.9/5

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