PwC Lead Consultant Interview Questions and Answers

Q1. Explain the structure of microservices architecture
Ans. 
Microservices architecture is a design approach where an application is composed of small, independent services that communicate with each other.
• Each service is responsible for a specific function or feature

• Services are loosely coupled and can be developed, deployed, and scaled independently

• Communication between services is typically done through APIs

• Each service can be developed using different technologies or program...read more
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Q2. How to implement SQS and SNS in AWS cloud
Ans. 
Implementing SQS and SNS in AWS cloud involves creating queues and topics, setting up permissions, and configuring subscriptions.
• Create an SQS queue and configure its settings

• Create an SNS topic and configure its settings

• Set up permissions to allow SQS to send messages to SNS

• Configure subscriptions to connect the SQS queue to the SNS topic
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Q3. What are the things which we need to be aware before we start migrating monolith into microservices
Ans. 
Considerations before migrating monolith into microservices
• Understand the current monolith architecture and dependencies

• Identify the boundaries for microservices and plan the decomposition

• Ensure proper testing and monitoring strategies are in place

• Address data management and consistency challenges

• Prepare for potential performance overhead and increased complexity
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Q4. How to provide security to apis without using spring security
Ans. 
Implement API security using token-based authentication and authorization
• Use token-based authentication like JWT (JSON Web Tokens)

• Implement custom authentication and authorization logic in the API endpoints

• Utilize API keys for access control and rate limiting

• Implement OAuth for secure authorization and delegation of access
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Q5. What is API gateway
Ans. 
API gateway is a server that acts as an API front-end, receiving API requests, enforcing throttling and security policies, passing requests to the back-end service, and then passing the response back to the requester.
• API gateway acts as a single entry point for all API requests

• It can handle tasks like authentication, authorization, rate limiting, and caching

• Examples of API gateways include Amazon API Gateway, Apigee, a
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Q1. Functional interface
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Q2. Object oriented concepts
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Q3. Stream api
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Q4. Synchronization
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Q5. While loop exceptions
Ans. 
While loop exceptions are errors that occur during the execution of a while loop.
• Common while loop exceptions include infinite loops, where the loop never terminates.

• Another exception is when the loop condition is never met, causing the loop to never execute.

• Handling exceptions in while loops can be done using try-catch blocks to catch and handle errors.
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Q1. Write a program to print a pattern.
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Q2. Wite a program to check fibonaaci.
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Q3. Write a program to find a subarray
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DILR questions very easy

Q1. Guesstimates market sizing
Ans. 
Estimate the size of the market by making educated guesses based on available information
• Start by identifying the total population or target demographic

• Estimate the percentage of the population that would be interested in the product or service

• Consider factors such as market trends, competition, and potential growth opportunities

• Use industry reports, surveys, and data analysis to support your estimates
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Q2. Tell me about yourself
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Experienced consultant with a background in business strategy and project management.
• Over 5 years of experience in consulting roles

• Specialize in developing and implementing business strategies

• Skilled in project management and client relationship management

• Previously worked with Fortune 500 companies on large-scale projects
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Case study on market entry

Mostly puzzles with some aptitude question

Pharma case study with multiple sql questions

Q1. Tell me something about you
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Q2. Guesstimate
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Q1. Explain about P2P process
Ans. 
P2P process stands for Procure-to-Pay process, which involves the steps from requisition to payment for goods or services.
• P2P process starts with a requisition for goods or services needed by a company.

• The next step involves creating a purchase order (PO) to specify the details of the purchase.

• Upon receiving the goods or services, the company will match the invoice with the PO and goods receipt.

• Finally, the payment is ...read more
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Q2. Explain about your experiences
Ans. 
I have diverse experiences in consulting across various industries and have successfully led multiple projects.
• Worked with clients in industries such as healthcare, technology, and finance

• Led teams to develop and implement strategic plans for clients

• Provided recommendations for process improvements and cost savings

• Managed stakeholder relationships and communicated project updates effectively
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Q1. Why BCG Nairobi
Ans. 
BCG Nairobi offers a unique opportunity to work on impactful projects in a dynamic and diverse environment.
• Opportunity to work on projects with significant social impact

• Dynamic and diverse work environment

• Access to a wide network of clients and industries in Nairobi
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Q2. Tell me about a time you had to deal with ambiguity
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Q1. Show architecture of multiple microservice in MS Paint..
Ans. 
Architecture of multiple microservices in MS Paint
• Draw separate boxes for each microservice

• Connect the boxes with lines to show communication

• Label each box with the name of the microservice

• Include any databases or external services used by the microservices
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Q2. Why we use dependency injection, draw it inms paint...,first told me give real life example and when I gave the answer he cut me off again..
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Q1. Tell me about yourself
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Q2. Write program to check string is palindrom
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Q3. Write programm to Remove number from array who occur more than once
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Q4. String Buffer vs String Builder
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Q5. If String s="Deloitte"; and String s2=new String("Deloitte"); what will be s1.equals(s2) and if(s1==s2)
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Q6. Why spring boot is better than spring ? Annotations of spring
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Q7. Query for count employee in each department
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Q8. How to create react app ? npm commands to create react app
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Q9. How routing works in react
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Q10. Dml dcl and ddl command
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