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I applied via campus placement at Thapar Institute of Engineering and Technology (TIET) and was interviewed in Apr 2024. There were 3 interview rounds.
Aptitude, maths, cs fundamentals, dbms
I was interviewed in Jan 2022.
Round duration - 100 Minutes
Round difficulty - Hard
There were 2 interviewers. It started with an introduction from me and one of the interviewers directly started with a DSA questions. Two problems were asked and I had to code them on a compiler of my choice by sharing my screen. Level of DSA question was medium but I was severely grilled on oops. I had to create different abstract classes, interface and explain entire oops with examples.
This was followed by a set of core JAVA questions :
Difference between == and .equals() ?
Mention some methods of the object class?
Difference between TreeSet and SortedSet?
How is a String saved in JAVA?
difference between string pool and heap memory?
I directly gave an approach to find the lowest common ancestor of the two nodes and then finding separate distances between the Ancestor node and the two nodes and returning the sum of the distances. I was then asked to code the whole solution which I correctly completed.
I was happy after seeing the question and coded it in 3 minutes using while loop. I was the asked to do it by recursion and i successfully did it but the catch here was to explain to the interviewer the entire memory management in heap and stack along with complexity solution.
I solved it using o(e+v) algo and interviewers were very patient and helpful
Tip 1 : Tree is the most important topic in BlackRock recruitment process.
Tip 2 : have atleast one live working project- host your project either on Heroku/Play Store.
Tip 3 : Practice atleast 100 leetcode medium questions.
Tip 1 : Don't oversell yourself because interviewers will grind you on everything that you write in resume.
Tip 2 : Mention links to your project.
I was interviewed before Jun 2021.
Round duration - 90 Minutes
Round difficulty - Medium
Questions on Sql fundamental
What is indexing?
What is a stored procedure?
Round duration - 60 Minutes
Round difficulty - Medium
Step 1 : gave most optimized approach
Step 2 : interviewer asked to write the code
Round duration - 60 Minutes
Round difficulty - Easy
Why should we hire you?
What keeps you motivated?
Tip 1 : Pratice regularly atleast 5 problem . Make it habit .Try to cover Leetcode medium questions as many as possible
Tip 2 : Be through with your projects . At some point interviewer will ask you some project related questions
Tip 3 : Be strong in your CS fundamentals.
Tip 1 : Do not put irrelevant information such as DOB
Tip 2 : Put only those skill which you can defend in cross questioning
Blackrock interview questions for designations
I was interviewed before Dec 2020.
Round duration - 87 minutes
Round difficulty - Medium
Timing : It was conducted in evening at 3 PM
The pacreception environment was very user friendly .
The platform was audio and video proctored.
A binary string is a string in whi...
The idea here is to keep a variable ‘value’ for storing the decimal value. We start traversing the string from the end and for each digit multiply the digit with the proper power of 2 and add it to the variable ‘value’ and after complete traversal of the string return the variable ‘value’.
Round duration - 80 minutes
Round difficulty - Medium
So This was a very interactive round . There were two interviewers , one male and one female . The male interviewer was quite experienced where as female interviewer was relatively new . The Interview started by a small introduction followed by some OOPS related questions where I was tested on how i perceive the concept of OOPS in real life . Then this conversation was followed by some core concepts of JAVA like abstract classes and interfaces . Then I was asked about my projects that i mentioned in my resume , then after some healthy discussion on those projects , the interviewer started to question about DBMS , I was asked some basic queries followed by some advanced queries and then followed by a discussion on SQL vs NoSQL . Then Interviewers asked me about my tech stack and the source of my technical knowledge. Then at last I was asked that why Blackrock and this concluded my Interview.
We know that the ‘i’th’ level of a triangle contains ‘i’ number of stars. So we can start making the triangle from top to bottom. If we have enough stars, then we make the next level of the triangle. Otherwise, we stop and return the number levels made so far.
Here is the algorithm:
I was given two tables one was employee table and other was a department table. On basis of these tables I was asked few questions :-
1. Write a query to find the max salary of any employee .
2....
Tip 1 : Be precise about what to do and what not to do.
Tip 2 : Always Revise the concepts you have done in past , use prime day revision theory.
Tip 3 : Do as many projects as you can but always mention those projects in which you are very well versed.
Tip 4 : Keep on reading random news related to your favourite tech and always have an in depth knowledge of what tech you currently use.
Tip 1 : Keep it short , precise and effective .
Tip 2 : Mention even small things that you did had an impact on other people.
Get interview-ready with Top Blackrock Interview Questions
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I applied via Walk-in and was interviewed in Dec 2024. There were 10 interview rounds.
Any ideas for an aptitude test?
What is education in place?
What is a SQL Server?
Effective communication and any suggestion.
Engage with any assignment provided.
Please provide any assignments you have.
I applied via LinkedIn and was interviewed in Sep 2024. There were 2 interview rounds.
The onbeforeunload method is used to prevent form save.
Use the onbeforeunload method to display a warning message before leaving the page without saving the form.
Return a custom message in the method to prompt the user to confirm if they want to leave the page.
Example: window.onbeforeunload = function() { return 'Are you sure you want to leave this page without saving?'; };
I applied via Naukri.com
Java program to sort an array of strings
Use Arrays.sort() method to sort the array of strings
Import java.util.Arrays package
Example: String[] arr = {"apple", "banana", "orange"}; Arrays.sort(arr);
Collections in Java and Spring Boot are used to store and manipulate groups of objects.
Collections in Java are used to store multiple objects in a single unit.
Spring Boot provides support for managing collections through various data structures like List, Set, Map, etc.
Collections in Java and Spring Boot help in organizing and manipulating data efficiently.
Example: List
I applied via Naukri.com and was interviewed in Jun 2024. There were 2 interview rounds.
I applied via Job Portal and was interviewed in Jul 2024. There was 1 interview round.
DOM stands for Document Object Model. It is a programming interface for web documents that allows scripts to dynamically access and update the content, structure, and style of a webpage.
DOM is a tree-like structure that represents the elements of an HTML document.
It allows developers to manipulate the content and structure of a webpage using JavaScript.
Example: document.getElementById('myElement') allows you to access
Virtual DOM is a lightweight copy of the actual DOM in React.js, used for efficient updates and rendering.
Virtual DOM is a concept where a lightweight copy of the actual DOM is maintained by React.js.
It allows React to efficiently update and render components by comparing the virtual DOM with the actual DOM.
When changes are made to the virtual DOM, React calculates the most efficient way to update the actual DOM.
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