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Blackrock interview experience Real time questions & tips from candidates to crack your interview

SDE - 1

Blackrock
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3 rounds | 3 Coding problems

Interview preparation journey

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Preparation
Duration: 4 months
Topics: Data Structures , Algorithms , Operation Systems , OOPS , DBMS , Web Development
Tip
Tip

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.

Application process
Where: Campus
Eligibility: Above 7 CGPA
Resume Tip
Resume tip

Tip 1 : Keep it short , precise and effective .
Tip 2 : Mention even small things that you did had an impact on other people.

Interview rounds

01
Round
Medium
Online Coding Interview
Duration87 minutes
Interview date7 Sep 2020
Coding problem1

Timing : It was conducted in evening at 3 PM
The pacreception environment was very user friendly .
The platform was audio and video proctored.

1. Binary to Decimal

Easy
15m average time
80% success
0/40
Asked in companies
OptumMathworksTata Consultancy Services (TCS)

Ninja is given a binary number as a string ‘S’ of size ‘N’, he is asked to convert it into its decimal equivalent (as an Integer) and print it.

Note:

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02
Round
Medium
Face to Face
Duration80 minutes
Interview date9 Sep 2020
Coding problem2

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.

1. Ninja And The Triangle

Easy
15m average time
85% success
0/40
Asked in companies
WalmartBlackrock

Ninja has been given ‘N’ stars. Ninja has to make a triangle using these stars. The ‘i’th’ level of a triangle contains a ‘i’ number of stars.

Can you help Ninja to ...

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2. SQL Questions

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. Write a query to find the max salary of any employee in all the department , grouped by department .
3. Write a query to find all the departments where sum of salaries of the employees is less ...

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03
Round
Easy
HR Round
Duration10 minutes
Interview date9 Sep 2020
Coding problem0

It was a relatively simple round where I was asked about my schooling , my family background , my projects as well as my achievements in school and college .
Other than that there were some basic questions regarding relocation and compensation.

Here's your problem of the day

Solving this problem will increase your chance to get selected in this company

Minimum number of operands are required to use relational operators?

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