Ups Logistics Senior Software Engineer Interview Questions and Answers

Q1. How to identify and solve race condition.
Ans. 
Identifying and solving race conditions involves understanding concurrent execution and implementing synchronization mechanisms.
• Understand the critical sections of code where race conditions can occur

• Use synchronization mechanisms like locks, semaphores, or atomic operations to control access to shared resources

• Implement thread-safe data structures or use thread-safe libraries to avoid race conditions

• Use tools like sta...read more
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Q2. Solve an array question on finding the third largest in an unsorted array.
Ans. 
Find the third largest element in an unsorted array of strings.
• Sort the array in descending order.

• Remove duplicates if necessary.

• Return the element at index 2 as the third largest.
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Q1. Technical questions.
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Q1. Salary discussion
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Q1. Had one to one with manager.
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It was a normal aptitude test with mathematical questions.

It was a techno-coding test where I had to code while sharing my screen on a live conversation with the interviewer.

Q1. I was primarily asked about managerial questions on adaptability to new technology and creativity if existing solutions don't work.
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Q2. In a situation where your team is not getting a proper result with existing approach your team uses, how would you try to fix it?
Ans. 
I would analyze the current approach, identify the root cause of the issue, brainstorm alternative solutions, and collaborate with the team to implement and test them.
• Analyze the current approach to identify weaknesses

• Brainstorm alternative solutions with the team

• Implement and test the new solutions

• Regularly communicate and collaborate with team members
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Q1. Explain oops concepts, difference b/w abstraction and interface,MVC architecture,stored procedure,joins
Ans. 
OOPs concepts, abstraction vs interface, MVC architecture, stored procedures, joins
• OOPs concepts include inheritance, polymorphism, encapsulation, and abstraction

• Abstraction is hiding the implementation details while interface is a contract that defines the methods that a class must implement

• MVC architecture separates the application into Model, View, and Controller components for better organization and maintenance

• Sto...read more
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SQL queries, ddl,dml TCL commands, primary key and foreign key differences,what is composite key,hash table in c#,generics in c#.

Q1. Salary discussion,
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Q1. Pivot columns in sql
Ans. 
Pivoting columns in SQL involves transforming rows into columns to display data in a different format.
• Use the PIVOT keyword in SQL to pivot columns

• Specify the columns to pivot on and the values to display in the new columns

• Aggregate functions like SUM, AVG, COUNT can be used with PIVOT

• Example: SELECT * FROM table_name PIVOT (SUM(value_column) FOR pivot_column IN ('value1', 'value2', 'value3'))
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Q2. Slow changing dimensions
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Q3. Dynamic rankx top 3
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Q4. Field parameters
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Q5. Stored procedures
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Q1. Behavioural and Experience based questions
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Q2. Tell be about a time sort of stuff
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