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. Sorting algorithms
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Q1. Detailed project diacussion
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Q1. Basic hr questions
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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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Basic algorithms testing

Q1. HLD question on chat application
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Q1. What is restful api
Ans. 
RESTful API is an architectural style for designing networked applications
• REST stands for Representational State Transfer

• Uses standard HTTP methods like GET, POST, PUT, DELETE

• Resources are identified by URIs

• Stateless communication between client and server

• Responses are typically in JSON or XML format
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Q2. Bootstarp grid system
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Had the coding round and we have to solve the find nth largest element.

Q1. Java 8 concepts and oops concepts
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Q1. There questions were on java mainly focusing on oops concept followed my exception handling concept
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Q2. What is checked and unchecked exception demonstrate with an example
Ans. 
Checked and unchecked exceptions are used in Java to handle errors. Checked exceptions must be handled, while unchecked exceptions do not.
• Checked exceptions are checked at compile-time and must be handled using try-catch or throws keyword

• Unchecked exceptions are not checked at compile-time and do not require handling

• Example of checked exception: IOException

• Example of unchecked exception: NullPointerException
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Q3. They asked questions on html
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Q1. What are your salary expectations?
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Q2. Tell me about yourself.
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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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