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BCG Interview Questions, Process, and Tips

Updated 27 Feb 2025

Top BCG Interview Questions and Answers

View all 92 questions

BCG Interview Experiences

Popular Designations

196 interviews found

I applied via Referral

Interview Questionnaire 

1 Question

  • Q1. Our client is a builder who constructs office buildings and residential apartments on contract. There’s a new contract construction of a residential society. Almost 30% of the society has been built and no...
  • Ans. 

    The builder should consider using Fly Ash bricks as the base material for the residential society construction.

    • Fly Ash bricks are more environmentally friendly compared to common burnt clay bricks and concrete bricks.

    • Fly Ash bricks have better thermal insulation properties, reducing energy consumption for heating and cooling.

    • Fly Ash bricks have higher strength and durability compared to common burnt clay bricks.

    • Fly Ash...

  • Answered by AI

Interview Preparation Tips

Round: Case Study Interview
Experience: How big is our client in terms of business? Is he present in some other business as well?
Consider the client someone similar to DLF
Has the client consistently been using all these types of bricks in construction? Or is some material new?
The burnt claybrick is the most commonly used one. Next are fly ash and sand lime bricks and concrete bricks are relatively new. This is kind of general trend in the market (i.e. among competition) as well as our clientWhere is the residential society located where the construction needs to be done?It’s in Mumbai
Tips: In general, in case interviews, the interviewer wants to push you hard so that you think harder and bring out more points. It’s only necessary to test the problem solving abilities and check the person’s nerve with problems. Thus, during these times, one should never stop thinking or throwing in new ideas at the interviewer. The ideas may or may not be what the interviewer wants to hear, but this strategy would never reflect anything negative about the interviewee. In fact, works positively in most cases. My interviewers were happy with the discussions I had with them and I was offered the job position after this interview

Skill Tips: First layout the basic structure of how you might want to proceed with the case and then continue asking question along the way –which is more like thinking out loud. This helps to involve the interviewer in the discussion
Skills: Case Analysis
College Name: Indian School Of Business (ISB)

Top BCG Consultant Interview Questions and Answers

Q1. “there is a company in the telecom sector and has a product “X” – this X is a necessity in telecom and the company has been making good profits for the last 4 years – like 40% gross margin.. and now suddenly the revenue and profits are stag... read more
View answer (3)

Consultant Interview Questions asked at other Companies

Q1. How would you pass an entry for travel expenses incurred and paid by employee and was reimbursed? How would the end to end flow happens
View answer (8)
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I was interviewed in Jan 2025.

Round 1 - One-on-one 

(5 Questions)

  • Q1. Basics of Python, Flask, ReactJs, RestApi Development
  • Q2. Python - Difference between is and ==
  • Ans. 

    The 'is' operator checks if two variables point to the same object in memory, while '==' checks if the values of the two variables are equal.

    • Use 'is' to check if two variables reference the same object in memory

    • Use '==' to check if the values of two variables are equal

    • Example: a = [1, 2, 3]; b = a; a is b will return True, a == b will also return True

  • Answered by AI
  • Q3. React - useEffect vs useState
  • Ans. 

    useEffect is used for side effects in functional components, while useState is used for managing state.

    • useEffect is used to perform side effects in functional components, like data fetching, subscriptions, or manually changing the DOM

    • useState is used to manage state in functional components, allowing the component to re-render when the state changes

    • Example: useEffect can be used to fetch data from an API when the compo...

  • Answered by AI
  • Q4. Authentication in RestApi
  • Ans. 

    Authentication in RestApi involves verifying the identity of users before granting access to resources.

    • Use tokens (JWT) for authentication

    • Implement OAuth for secure authentication

    • Utilize session management for user authentication

    • Implement two-factor authentication for added security

  • Answered by AI
  • Q5. React - Pure Component and Higher order components

Python Fullstack Developer Interview Questions asked at other Companies

Q1. what are the key differences between ArrayList and LinkdList in python?
View answer (1)

Interview Questions & Answers

user image Anonymous

posted on 13 Jan 2025

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
Not Selected

I applied via Approached by Company and was interviewed in Dec 2024. There were 3 interview rounds.

Round 1 - Coding Test 

Asked coding questions on Python and SQL
Python - find longest non repeating substring
SQL - join and window function

Round 2 - Assignment 

Develop a production-grade application in Python that analyzes data and provides answers to questions based on the dataset.

Round 3 - Technical 

(2 Questions)

  • Q1. System design and project based questions
  • Q2. Scenario-based questions that can help assess how you handle various situations

Interview Preparation Tips

Topics to prepare for BCG interview:
  • Coding
  • System Design
  • Managerial
Interview preparation tips for other job seekers - You need to be thorough with coding, technical depth in projects and scenario based solutions for various difficult situations that one might have to face a a lead
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
Not Selected

I applied via Naukri.com and was interviewed in Dec 2024. There were 2 interview rounds.

Round 1 - One-on-one 

(2 Questions)

  • Q1. How does Django apply migrations to the database?
  • Ans. 

    Django applies migrations to the database using the 'manage.py migrate' command.

    • Django tracks changes to models and generates migration files accordingly.

    • The 'manage.py makemigrations' command creates migration files based on model changes.

    • The 'manage.py migrate' command applies the generated migration files to the database.

    • Migrations help keep the database schema in sync with the changes in Django models.

  • Answered by AI
  • Q2. What is hoisting in javascript?
  • Ans. 

    Hoisting in JavaScript is the behavior where variable and function declarations are moved to the top of their containing scope during the compilation phase.

    • Variable declarations are hoisted to the top of their scope, but not their assignments.

    • Function declarations are fully hoisted, meaning they can be called before they are declared.

    • Hoisting can lead to unexpected behavior if not understood properly.

  • Answered by AI
Round 2 - Assignment 

Create a full stack application in 3 days.

Skills evaluated in this interview

Top BCG Software Engineer Interview Questions and Answers

Q1. why redux is used and advantages?
View answer (1)

Software Engineer Interview Questions asked at other Companies

Q1. Bridge and torch problem : Four people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. Person... read more
View answer (196)

BCG interview questions for popular designations

 Consultant

 (69)

 Associate

 (21)

 Associate Consultant

 (15)

 Summer Intern

 (12)

 Software Engineer

 (9)

 Intern

 (7)

 Data Engineer

 (7)

 Data Analyst

 (5)

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Walk-in and was interviewed in Dec 2024. There were 3 interview rounds.

Round 1 - SCREENING 

(2 Questions)

  • Q1. About Project and expertise
  • Q2. Why BCG?
  • Ans. 

    BCG offers a challenging and innovative work environment with opportunities for growth and development.

    • BCG is known for its cutting-edge technology and innovative projects

    • Opportunities for professional growth and development

    • Strong company culture focused on collaboration and teamwork

  • Answered by AI
Round 2 - Technical 

(1 Question)

  • Q1. Polymorphism, OS Deadlock
Round 3 - Technical 

(1 Question)

  • Q1. More about how to resolved code merge issue in Git

Top BCG Software Engineer Interview Questions and Answers

Q1. why redux is used and advantages?
View answer (1)

Software Engineer Interview Questions asked at other Companies

Q1. Bridge and torch problem : Four people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. Person... read more
View answer (196)

Get interview-ready with Top BCG Interview Questions

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

(2 Questions)

  • Q1. Why are you looking for a change?
  • Q2. Salary expectations.
Round 2 - Technical 

(2 Questions)

  • Q1. Basics of Python, Selenium, HTML/CSS, Locators, Testing Concepts
  • Q2. Solve a case study, based on a real-world problem
Round 3 - Technical 

(2 Questions)

  • Q1. Same as previous.
  • Q2. More difficult case study, managerial questions.
Round 4 - Behavioral 

(2 Questions)

  • Q1. Previous experience, explain the current working method, and how you can improve.
  • Q2. My expectations from the company

Interview Preparation Tips

Interview preparation tips for other job seekers - Be clear with the programming basics like file handling, oops, functions, overloading, overriding, testing methodologies, HTML, CSS, APIs, Postman, etc.

Software QA Engineer Interview Questions asked at other Companies

Q1. What exceptions have u faced while creating framework?
View answer (1)

Jobs at BCG

View all
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Approached by Company and was interviewed in Apr 2024. There were 4 interview rounds.

Round 1 - Aptitude Test 

Contained only mcq questions related to maths and reasoning

Round 2 - Technical 

(2 Questions)

  • Q1. How to detect two loops in a linkedlist
  • Ans. 

    Use Floyd's Cycle Detection Algorithm to detect two loops in a linked list.

    • Initialize two pointers, slow and fast, both starting at the head of the linked list.

    • Move slow pointer by one step and fast pointer by two steps in each iteration.

    • If they meet at some point, there is a loop. Reset one pointer to head and move both by one step until they meet again to find the start of the loop.

  • Answered by AI
  • Q2. Mainly all the basics questions on DSA and C++ Language and all the ds like stacks, linkedlist, tree, array, queue,map difference between queue and stack
Round 3 - Technical 

(3 Questions)

  • Q1. Questions on project
  • Q2. Code simple que like reverse the string in every possible language that is mentioned on yor resume ,like node js react or python and even c language
  • Q3. Basics questions of os like deadlocks
Round 4 - HR 

(1 Question)

  • Q1. I was note selected for this round

Interview Preparation Tips

Topics to prepare for BCG Junior Software Engineer interview:
  • DSA
  • React
  • SQL
  • Linkedlist
  • array

Skills evaluated in this interview

Junior Software Engineer Interview Questions asked at other Companies

Q1. If there are 10 ball 2 red, 5 blue ,3 orange and one ball is picked randomly what is probability that the ball picked is red?
View answer (2)

Data Analyst Interview Questions & Answers

user image Anonymous

posted on 25 Jul 2024

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Power BI Difference between ALL() and ALLSELECTED()
  • Ans. 

    ALL() ignores all filters in the query context, while ALLSELECTED() ignores only filters on columns in the visual.

    • ALL() removes all filters from the specified column or table.

    • ALLSELECTED() removes filters from the specified column or table, but keeps filters on other columns in the visual.

    • Example: ALL('Table') would remove all filters on the 'Table' in the query context.

    • Example: ALLSELECTED('Column') would remove filte...

  • Answered by AI
  • Q2. Excel Difference between COUNT() and COUNTA()
  • Ans. 

    COUNT() counts only numeric values, while COUNTA() counts all non-empty cells.

    • COUNT() counts only cells with numerical values.

    • COUNTA() counts all non-empty cells, including text and errors.

    • Example: COUNT(A1:A5) will count only cells with numbers, while COUNTA(A1:A5) will count all non-empty cells.

  • Answered by AI
Round 2 - Technical 

(2 Questions)

  • Q1. Resume based questions like explain the projects that you have done.
  • Q2. Sample dataset questions

Skills evaluated in this interview

Data Analyst Interview Questions asked at other Companies

Q1. Suppose there is a room in the office and X people enter room throughout the day, Y people leave throughout the day [continuously people are entering the room, some are staying there, and rest are going out] .. so tell me the code to calcul... read more
View answer (11)
Interview experience
3
Average
Difficulty level
Hard
Process Duration
More than 8 weeks
Result
Not Selected

I applied via Naukri.com and was interviewed in Jun 2024. There were 3 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Technical questions on GenAI
Round 2 - Technical 

(1 Question)

  • Q1. Technical high level questions on Previous projects
Round 3 - Behavioral 

(1 Question)

  • Q1. Team handling and other case based scenario questions

Software Engineering Specialist Interview Questions asked at other Companies

Q1. Explain Python Data Structures and advantages and some differences in each
View answer (2)
Interview experience
3
Average
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
-

I applied via Naukri.com and was interviewed in Aug 2024. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. How to write custom django admin commands
  • Ans. 

    Custom Django admin commands can be written to perform specific tasks in the Django admin interface.

    • Create a management/commands directory inside your Django app directory

    • Create a Python file for your custom command inside the management/commands directory

    • Define a class that extends BaseCommand and implement the handle method to execute the command logic

    • Register the custom command in the Django admin interface by addin

  • Answered by AI
  • Q2. Python decorator

Skills evaluated in this interview

Top BCG Software Engineer Interview Questions and Answers

Q1. why redux is used and advantages?
View answer (1)

Software Engineer Interview Questions asked at other Companies

Q1. Bridge and torch problem : Four people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. Person... read more
View answer (196)
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Referral and was interviewed in Jul 2024. There were 3 interview rounds.

Round 1 - Assignment 

An assignment based on the given scenario.

Round 2 - HR 

(1 Question)

  • Q1. Personal details and reason for change in job
Round 3 - One-on-one 

(1 Question)

  • Q1. Scenario based questions, aptitude and attitude , connecting new person or a popular personality

Executive Assistant Administrator Interview Questions asked at other Companies

Q1. How can you add value
View answer (1)

BCG Interview FAQs

How many rounds are there in BCG interview?
BCG interview process usually has 2-3 rounds. The most common rounds in the BCG interview process are Case Study, HR and Technical.
How to prepare for BCG 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 BCG. The most common topics and skills that interviewers at BCG expect are Consulting, Python, SQL, Analytical and Agile.
What are the top questions asked in BCG interview?

Some of the top questions asked at the BCG interview -

  1. “there is a company in the telecom sector and has a product “X” – this ...read more
  2. Your client is Tata Sons and their hierarchy is such that all their other busin...read more
  3. Case: Our client is a leading cement manufacturing firm in India looking to ent...read more
How long is the BCG interview process?

The duration of BCG interview process can vary, but typically it takes about less than 2 weeks to complete.

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