McKinsey & Company Software Developer Interview Questions and Answers for Freshers

• Q1. Java questions , stream api
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• Q2. Whatever you have mention in resume
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• Q1. Questions based on Java , C++ , OOPs, cloud computing, one coding question, regarding previous projects, some behavioural questions.
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• Q1. Basics on JS. Promises
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• Q2. Async/Await, Promises, Closures
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2 rounds easy

• Q1. Where do you see yourself in 5 years?
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• Q2. What are your strengths and weaknesses?
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• Q3. Tell me about yourself.
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Round duration - 90 minutes
Round difficulty - Medium

This test consists of two coding questions and some MCQ regarding computer fundamentals.

• Q1. Kevin And His Cards Kevin has two packs of cards. The first pack has N cards and the second one has M cards. Every card has an integer written on it. Now, you h...read more
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• Q2. Allocate Books Given an array ‘arr’ of integer numbers . where ‘arr[i]’ represents the number of pages in the ‘i-th’ book. There are ‘m’ number of students and ...read more
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Round duration - 40 minutes
Round difficulty - Easy

It was a technical round that is based on DSA and computer fundamentals.

• Q1. Reverse Linked List 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...read more
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• Q2. Sort 0 1 2 You have been given an integer array/list(ARR) of size 'N'. It only contains 0s, 1s and 2s. Write a solution to sort this array/list. Note : ...read more
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• Q3. OS Questions

  1.What is virtual memory
  2.WHat is segmentation
  3.WHat is deadlock
  4.WHat are semaphores 
  5.What are the conditions of deadlock.

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• Q4. DBMS Questions 1.ACID properties of DBMS 2.What are the differences between a DBMS and RDBMS? 3.What is normalization and what are the different types of normal...read more
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Simple coding test with easy to medium level questions

• Q1. What motivated you to get into this field ?
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• Q2. What are your long term goals
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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?

• Q1. Shortest Distance You have been given a Binary Search Tree and two keys 'NODE1' and 'Node2' in it. Your task is to find the shortest distance be...read more
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• Q2. Greatest Common Divisor You are given two numbers, ‘X’ and ‘Y’. Your task is to find the greatest common divisor of the given two numbers. The Greatest Common D...read more
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• Q3. Bridges In A Graph Given an undirected graph of V vertices and E edges. Your task is to find all the bridges in the given undirected graph. A bridge in any grap...read more
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