Schaeffer & Sam Lead Engineer Interview Questions and Answers

Q1. How are partitions assigned in Kafka?
Ans. 
Partitions in Kafka are assigned based on the number of partitions specified when creating a topic.
• Partitions are assigned to brokers in a round-robin fashion.

• The number of partitions should be a multiple of the number of brokers to ensure even distribution.

• Reassignment of partitions can be done manually using the Kafka Reassign Partitions tool.
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Q2. Have you ever use terraform?
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Yes, I have experience using Terraform for infrastructure as code.
• I have used Terraform to provision and manage infrastructure resources in a declarative manner.

• I have written Terraform configuration files to define the desired state of infrastructure components.

• I have used Terraform to automate the deployment of cloud resources such as virtual machines, storage, and networking.

• I have experience with Terraform modules ...read more
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Data structure and algo with arrays and hash

Q1. System design with high and low level design
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System design involves both high level and low level design to create a comprehensive architecture.
• High level design focuses on overall system architecture and functionality

• Low level design delves into specific components, modules, and interactions

• Examples: High level - deciding on database structure, Low level - designing specific API endpoints
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Q2. Design of whatsapp Design of notification engine in my project
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The notification engine in a project is designed to send timely and relevant notifications to users.
• Implement a system to track user preferences and settings for notifications.

• Utilize a queue system to prioritize and schedule notifications.

• Include options for users to customize notification frequency and content.

• Integrate with external services like email or SMS for notifications delivery.
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Q1. It was virtual interview.
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Q2. 1. Binary Search with code 2. Hash Map in deep 3. Core Java concepts
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Q1. How do you assess if a user story is complete or not. Have you heard about INVEST.
Ans. 
Assessing completeness of user stories using INVEST criteria.
• INVEST stands for Independent, Negotiable, Valuable, Estimable, Small, and Testable.

• A user story is complete if it meets all the criteria of INVEST.

• Independence: User story should be self-contained and not dependent on other stories.

• Negotiable: Details of the story can be negotiated between the team and stakeholders.

• Valuable: Story should deliver value to the...read more
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Q2. Are you aware of RACI matrix.
Ans. 
Yes, RACI matrix is a tool used to clarify roles and responsibilities in a project or process.
• RACI stands for Responsible, Accountable, Consulted, and Informed.

• It helps in defining who is responsible for what tasks, who is accountable for the overall success, who needs to be consulted before decisions are made, and who needs to be kept informed.

• For example, in a software development project, the Business Analyst might ...read more
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Q3. If there are multiple stakeholders and one of the stakeholder is old school and against the new requirement, how do you handle such stakeholder.
Ans. 
Address the concerns of the old school stakeholder by understanding their perspective, communicating effectively, and finding common ground.
• Listen to the stakeholder's concerns and try to understand their perspective.

• Communicate the benefits of the new requirement in a way that resonates with the stakeholder's values and priorities.

• Find common ground by highlighting areas where the new requirement aligns with the stake...read more
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Q1. What is the difference between requirement gathering and requirement elicitation.
Ans. 
Requirement gathering is the process of collecting and documenting requirements from stakeholders, while requirement elicitation is the process of discovering and extracting requirements from stakeholders.
• Requirement gathering involves documenting known requirements, while requirement elicitation involves uncovering hidden or unspoken requirements.

• Requirement gathering typically involves interviews, surveys, and docume...read more
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Q2. What are the 3Cs of a user story.
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The 3Cs of a user story are Card, Conversation, and Confirmation.
• Card: A user story is typically written on a physical or digital card to capture the essence of the requirement.

• Conversation: The user story should spark a conversation between the stakeholders to gather more details and clarify any doubts.

• Confirmation: The user story should have acceptance criteria that define when the story is considered complete.
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Q3. Traceability matrix
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Q1. What is timing in this job
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Q2. What rules in this job
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Q3. How many time in work in this job
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Q4. How can work in this company
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Q5. How many employees in this company
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Q1. How many time work in this company
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Q2. What language in this job
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Q3. How many experience in this job
Ans. 
I have 5 years of experience in this job.
• 5 years of experience in a similar role

• Managed a team of 10 employees

• Implemented new strategies to improve team performance
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All changles in all of above

Q1. All of above questions
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Q2. Technical support and give solution
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Q1. Performance optimisation
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Q1. Lods,parameters
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Q1. Sql queries on analytical queries
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Q2. Different constraints and join methods
Ans. 
Different constraints and join methods in database queries
• Constraints in database queries ensure data integrity and enforce rules on data

• Join methods in database queries are used to combine rows from two or more tables based on a related column between them

• Examples of constraints include primary key, foreign key, unique key, and check constraints

• Examples of join methods include inner join, outer join (left, right, full
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It was mostly on sub queries.

Q1. Java Collections
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Q2. Java8 Stream program
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Java8 Stream program to filter even numbers and double them
• Use Stream to filter even numbers

• Use map to double the filtered numbers

• Use collect to collect the results into a list
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Q1. Completable future
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Q2. Microservice architecture
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