Outline India Interview Questions and Answers

Round one was an online coding test where there were 5 sections :

1 - dsa - medium

2 - Java - Easy

3 - OOP - Easy

4 - Git - Easy

Q1. 1 - where is bean annotation used in springboot ?... In class or method
Ans. 
Bean annotation is used in Spring Boot on class or method to indicate that a method produces a bean to be managed by the Spring container.
• Bean annotation is used on methods within a class to indicate that the method produces a bean to be managed by the Spring container.

• It can also be used at the class level to indicate that the class itself is a Spring bean.

• For example, @Bean annotation can be used on a method that cre...read more
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Q2. Which access modifier to restrict interface method access to only derived or implemented classes
Ans. 
Protected access modifier restricts interface method access to only derived or implemented classes.
• Use 'protected' access modifier to restrict access to only derived or implemented classes

• Protected members are accessible within the same package or by subclasses

• Example: 'protected void methodName() {}' in an interface
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Q3. How does one services interact with other in microservice
Ans. 
Microservices interact with each other through APIs, messaging, or events.
• Microservices communicate with each other through APIs, which can be synchronous or asynchronous.

• Messaging systems like RabbitMQ or Kafka can be used for communication between microservices.

• Events can be used for loosely coupled communication between microservices.

• Service discovery mechanisms like Eureka or Consul help microservices locate and co...read more
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Q4. In an integer array where element represent stock price and index represent days how to detect the best day to buy and best day to sell in O(N)
Ans. 
To detect the best day to buy and sell stock in an integer array representing stock prices and days in O(N).
• Iterate through the array and keep track of the minimum price seen so far.

• Calculate the profit by subtracting the current price from the minimum price.

• Update the maximum profit and best buy/sell days accordingly.

• Return the best buy and sell days to maximize profit.
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Q5. In an integer array find the next greatest number for all and display in O(N)
Ans. 
Find the next greatest number for each integer in an array in O(N) time complexity.
• Iterate through the array from right to left

• Use a stack to keep track of potential next greatest numbers

• Pop elements from the stack that are less than the current element and update their next greatest number to the current element

• Push the current element onto the stack

• Repeat until all elements have a next greatest number
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First round Aptitude + Technical questions on CS fundamentals

Q1. Frog jump Dynamic programming question
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Q2. Remove zeroes from a numbers only string and insert at last also maintain the relative order
Ans. 
Remove zeroes from a numbers only string and insert at last while maintaining relative order.
• Iterate through the string and separate numbers and zeroes

• Store numbers in an array and zeroes in a separate array

• Concatenate the numbers array with the zeroes array at the end
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Q3. One sql question on joins
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Q1. Tell me about yourself
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Q2. Why do you choose this place
Ans. 
I chose this place because of its reputation for providing excellent international voice process services.
• Reputation for excellent international voice process services

• Positive feedback from current employees

• Opportunities for growth and development

• Convenient location for commuting

• Positive work culture and environment
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Aptitude, logical Reasoning, English grammar.

Q1. Questions based on what you written in your resume.
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Q2. Well prepared your resume don't write anything that you don't know about your resume.
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Q1. Here you have to listen carefully what the system is saying in english.
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Q2. This is round will test your listening skills, How clearly you can read a sentence and your communication skills.
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It's a easy round. This round will be conducted through Microsoft teams. Just confident and expressive while speaking that's it.

Q1. How do you resolve critical issues?
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Q2. How do to handle stakeholder's interests?
Ans. 
Handle stakeholder's interests by understanding their needs, communicating effectively, and delivering results.
• Understand the stakeholders' needs and priorities

• Communicate regularly and effectively with stakeholders

• Involve stakeholders in decision-making processes

• Deliver results that align with stakeholders' interests

• Manage expectations and address concerns promptly
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SQL Rank functions.
Python easy to medium DSA programs.
Pyspark Concepts and questions.

Q1. Explain one of your projects in End to End
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Q1. What are some of the analytical functions available in SQL?
Ans. 
Analytical functions in SQL are used to perform calculations on sets of rows.
• Aggregate functions like SUM, AVG, COUNT, MIN, MAX

• Window functions like ROW_NUMBER, RANK, DENSE_RANK, LAG, LEAD

• Ranking functions like NTILE, PERCENT_RANK, CUME_DIST

• Statistical functions like STDDEV, VARIANCE

• String functions like CONCAT, SUBSTRING, TRIM
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Q1. Median of 2 sorted array
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Q2. Linux commands for chmod
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Q3. Features of python
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Q4. Deepcopy and shallowcopy
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Q1. Normal discussion about experience and salary expectations
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Q2. Scheduled for 2nd round
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Q1. 2 interviewers, 1 of them who’s leaving the organisation in few days. Asked me about how would you strategise the campaigns and tell me about your successful campaign?
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Q1. This round was final with a Senior Manager as told by the HR
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Q2. The question returned to strategies again for the brand I have worked, after answering all the questions. The conversation derailed by the interviewers limiting technical knowledge. Wasted my valuable 50 m...read more
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Q1. This round supposed to be feedback round if hired then salary discussion, however, they conducted 1 more technical round as they had trust issues due to their lacking knowledge.
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Q2. Two Musketeers, took the round. One leaving the company thinking CEO of the company with lots of attitude conducted the interview with a live technical round over screen sharing. At last the CEO didn’t lik...read more
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30 easy aptitude questions.

Q1. Video analysis. Summarize the video in bullet points.
Ans. 
Video analysis involves summarizing the content of a video in bullet points.
• Identify key themes or topics discussed in the video

• Highlight important events or moments

• Note any key statistics or data presented

• Summarize the main conclusions or takeaways

• Include any notable visuals or graphics shown
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Q2. Summarize all the examples you saw in the video.
Ans. 
The video showcased various examples of data analysis and visualization techniques.
• Exploratory data analysis using histograms and scatter plots

• Predictive modeling using regression and classification algorithms

• Time series analysis for forecasting future trends

• Text mining for sentiment analysis

• Clustering techniques for customer segmentation
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Q3. Tell me about yourself
Ans. 
I am a recent graduate with a degree in Computer Science and a passion for data analysis and machine learning.
• Recent graduate with a degree in Computer Science

• Passionate about data analysis and machine learning

• Experience with programming languages like Python and R

• Completed projects involving data visualization and predictive modeling
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Q4. Discussion on projects.
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Q5. What do you know about mu Sigma?
Ans. 
Mu Sigma is a data analytics and decision sciences company that helps organizations make data-driven decisions.
• Mu Sigma was founded in 2004 and is headquartered in Chicago, Illinois.

• They provide services in areas such as marketing analytics, supply chain analytics, and risk analytics.

• Mu Sigma has worked with Fortune 500 companies across various industries to help them leverage data for better decision-making.

• The compan...read more
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Q6. Why do you want to join Mu Sigma?
Ans. 
I want to join Mu Sigma because of their reputation for providing challenging and impactful data science projects.
• Mu Sigma is known for working on cutting-edge data science projects with top clients

• I am excited about the opportunity to work with a diverse team of data scientists and learn from their expertise

• I believe Mu Sigma's focus on innovation and problem-solving aligns with my own career goals
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Q7. SQL and technical questions based on your projects or tech stack.
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Q8. What challenges you faced during your projects?
Ans. 
I faced challenges in data cleaning, feature engineering, and model optimization during my projects.
• Data cleaning: Dealing with missing values, outliers, and inconsistencies in the data.

• Feature engineering: Creating new features from existing data to improve model performance.

• Model optimization: Tuning hyperparameters and selecting the best algorithm for the problem.

• Example: In a project predicting customer churn, I ha...read more
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Q1. Self introduction and explain your hobbies
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Q2. They will check your communication level
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Q1. Self introduction with aptitude questions
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Q2. They will check communication
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Q1. Basics of market sizing
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Q2. DROC market analysis
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Q1. More Market sizing questions
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Q1. Why marketsnadmarkets
Ans. 
MarketsandMarkets is a leading market research firm providing in-depth analysis and insights across various industries.
• Provides comprehensive market research reports and analysis

• Offers insights into industry trends, market size, and competitive landscape

• Helps businesses make informed decisions based on data-driven research

• Cover a wide range of industries such as healthcare, technology, and automotive
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Q2. Why are you leaving previous job
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