7 Eleven Interview Questions, Process, and Tips

Q1. Design a system where 2 transaction should happen one after the other. Both should pass and if one fails none should be persist or eventually all txn should roll back
Ans. 
Design a system for sequential transactions with rollback on failure
• Use a transaction manager to coordinate the two transactions

• Implement a try-catch mechanism to handle failures and trigger rollback if needed

• Ensure that both transactions are part of the same unit of work
Answered by AI
Add your answer
Q2. Whats is Kafka, Partition, ConsumerGroup
Ans. 
Kafka is a distributed streaming platform, Partition is a way to divide data, ConsumerGroup is a group of consumers sharing the load.
• Kafka is a distributed streaming platform used for building real-time data pipelines and streaming applications.

• Partition is a way to divide data within a Kafka topic to allow for parallel processing and scalability.

• ConsumerGroup is a group of consumers that work together to consume data ...read more
Answered by AI
Add your answer
Q3. Exception handling in detail
Ans. 
Exception handling is a programming concept that deals with errors during program execution.
• Exception handling allows for graceful handling of errors in a program.

• It involves try, catch, and finally blocks to handle exceptions.

• Examples include catching divide by zero errors or file not found exceptions.
Answered by AI
Add your answer
Q4. How to handle hashmap Memory leak
Ans. 
To handle hashmap memory leak, ensure proper management of keys and values, use weak references, and periodically check for unused entries.
• Avoid storing unnecessary data in the hashmap

• Use weak references for keys or values if appropriate

• Periodically check for and remove unused entries to free up memory
Answered by AI
Add your answer

There are 2 questions on array and linkedlist

Q1. What is normalization ?
Ans. 
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization involves breaking down a database into smaller, more manageable tables.

• It helps in reducing data redundancy by storing data in a structured manner.

• Normalization ensures data integrity by minimizing the chances of anomalies during data manipulation.

• There are different levels of normalization such a...read more
Answered by AI
Add your answer
Q2. Given a sample , write some nested quries.
Ans. 
Nested queries are used to retrieve data from multiple tables in a database.
• Use subqueries to retrieve data from a nested query within the main query.

• Use JOIN statements to combine data from multiple tables in a nested query.

• Nested queries can be used in SELECT, INSERT, UPDATE, and DELETE statements.
Answered by AI
Add your answer

Q1. Tell about the projects you did in college
Ans. 
I completed a project on optimizing supply chain processes for a local manufacturing company.
• Researched current supply chain processes and identified areas for improvement

• Implemented new inventory management system to reduce stockouts and excess inventory

• Collaborated with cross-functional teams to streamline procurement processes

• Presented findings and recommendations to company executives for implementation
Answered by AI
Add your answer
Q2. Tell about you understanding of supply chain in retain industry
Add your answer

Q1. Salary discussion
Add your answer
Q2. It is mostly WFO so are you comfortable in it
Ans. 
Yes, I am comfortable with WFO (Work From Office) as it is the primary mode of work.
• I have experience working in a WFO environment in my previous roles.

• I am familiar with the expectations and responsibilities of working in an office setting.

• I am adaptable and can easily transition between WFO and WFH (Work From Home) as needed.
Answered by AI
Add your answer

Asked basics of selenium and appium