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

SDE - Intern

Blackrock
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3 rounds | 8 Coding problems

Interview preparation journey

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Preparation
Duration: 6 months
Topics: AVL Trees ,OOPS, Data Structures, WebDev(if mentioned in resume), Operating system, DBMS
Tip
Tip

Tip 1 : Revise Trees especially AVL trees and tree traversals as the major questions for data structures were from trees. 
Tip 2 : Revise your OOPs concepts for the interview round.
Tip 3 : If you have done a project in development, make sure you know well about them.

Application process
Where: Campus
Eligibility: 8 CGPA or above
Resume Tip
Resume tip

Tip 1 : Mention only those things in your resume, you have knowledge about.
Tip 2 : A project in development is a plus.

Interview rounds

01
Round
Medium
Online Coding Interview
Duration95
Interview date6 Oct 2020
Coding problem0

The test took place in the afternoon at around 2:00 p.m. It was MCQ type test & there were no coding questions. The test was divided into 3 sections. All the sections were MCQ based and contained different time limits. You could choose the order in which you will attempt the sections.
Aptitude: quantitative, Qualitative, attention to Detail, Verbal Reasoning
Computer Fundamentals: system design, DBMS, Data structures
English

The test was both audio & video proctored. Aptitude Questions are moderate level, but you have to be fast since the time allotted is less. System Design questions are given in the form of flow charts. Data structure questions were mainly on AVL trees, tree traversals, postfix, prefix, and heaps. So make sure to revise these concepts. DBMS questions are based majorly on Oracle SQL And there was a specific time allotted for each section and you cannot navigate between different sections or questions. There was no negative marking.

02
Round
Medium
Face to Face
Duration60
Interview date9 Sep 2020
Coding problem5

This was a Technical round. About 60 students were shortlisted for this round. There were two interviewers. First, they asked me to introduce myself. Then I was asked some concepts of OOPS. some questions from OS and DBMS. I was asked to write code to reverse a link list on the notepad and share my screen. Then I was asked about my projects and internship. There were some situational questions related to the internship. They asked me what I know about the company.

My interview took place in the morning at around 10:00 a.m. and lasted for about an hour.

1. OOPS Concepts

Mention major features of OOPS. He also asked about the use of the final keyword. Then he asked me about an interface and the differences between an interface and abstract classes?
 

Problem approach

Read articles on OOPS and should have a deep knowledge of OOPS concepts.

2. Python vs C++

What is the difference between python and C++? 

Problem approach

Told him some of the major difference between these two popular languages.

3. Threads and Processes

1. Define process in OS. 

2. What is the difference between process and thread? 

3. Mention different states of a process.

Problem approach

Read articles about the Operating systems and should have a deep knowledge of operating systems.

4. DBMS

1. What are keys?
2. Mention & define all the keys.
3. What is the difference between SQL and No SQL?

Problem approach

Read articles about DBMS and should have deep knowledge of DBMS

5. Reverse Linked List

Moderate
15m average time
85% success
0/80
Asked in companies
CognizantMicrosoftSAP Labs

Given a singly linked list of integers. Your task is to return the head of the reversed linked list.

For example:
The given linked list is 1 -> 2 -> 3 -> 4-> NULL. Then the reverse linked list is 4 -> 3 -> 2 -> 1 -> NULL and the head of the reversed linked list will be 4.
Follow Up :
Can you solve this problem in O(N) time and O(1) space complexity?
Problem approach

I was asked to write the code for the same and share my screen. So I explained both the iterative and recursive approaches and wrote the code with the iterative approach.

Try solving now
03
Round
Medium
HR Round
Duration30
Interview date9 Sep 2020
Coding problem3

It was a virtual interview and there was just one interviewer. The interviewer was really friendly. First of all, the interviewer introduced himself and also shared some facts about the company. Then he asked me to introduce myself. Then behavioral and situational questions were asked. Then he asked if I was comfortable with relocation. BlackRock has 2 locations that are Gurgaon and Mumbai.

1. Describe your strength and give instance for each of them

Problem approach

Tip 1 : Try to align the strengths with the morals of the company.
Tip 2 : Prepare the introduction question well, as this will be asked by every company

2. If you are faced with a failure, How do you handle it?

Problem approach

I try to figure out where did I went wrong and what all changes should I make in my path to achieve my goals. I take failures as a learning experience.

3. How will you handle a difficult customer?

Problem approach

I gave an instance from my TAship with Coding Ninjas when I had to handle a rude student.

Here's your problem of the day

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

Skill covered: Programming

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