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Porter Senior Software Engineer Interview Questions and Answers
Porter Senior Software Engineer Interview Experiences
2 interviews found
Namrata Chatekar
(1 Question)
- Q1. Leetcode medium coding question
Anonymous
Selected
I applied via Company Website and was interviewed in Jan 2024. There were 2 interview rounds.
Java, springboot, mysql
(1 Question)
- Q1. System design question
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I applied via Recruitment Consultant and was interviewed in May 2021. There were 4 interview rounds.
Interview Questionnaire
10 Questions
- Q1. First-round was an online test on hacker rank. There were 4 questions related to the array, string, and tree.
- Q2. Create an immutable class.
- Ans.
An immutable class is a class whose instances cannot be modified after creation.
Make all fields private and final
Don't provide any setter methods
Ensure that any mutable objects passed to the constructor are defensively copied
Make the class final so that it cannot be subclassed
- Q3. Create a Singelton pattern.
- Ans.
Singleton pattern ensures only one instance of a class is created and provides a global point of access to it.
Create a private constructor to prevent direct instantiation of the class.
Create a private static instance of the class.
Create a public static method to access the instance, and create the instance if it doesn't exist.
Ensure thread safety by using synchronized keyword or double-checked locking.
- Q4. Difference between Vector and ArrayList.
- Ans.
Vector is synchronized and ArrayList is not. Vector is thread-safe and ArrayList is not.
Vector is a legacy class and ArrayList is a part of the Java Collection Framework.
Vector is synchronized which means only one thread can access it at a time, while ArrayList is not.
Vector is thread-safe which means it can be used in a multi-threaded environment, while ArrayList is not.
Vector is slower than ArrayList because of synch...
- Q5. Create Linked List without using the internal library and provide the functionality of add delete find.
- Ans.
Create Linked List without using internal library and provide add, delete, find functionality.
Create a Node class with data and next pointer
Create a LinkedList class with head pointer and methods to add, delete, and find nodes
Use a loop to traverse the list and perform operations
Handle edge cases such as adding to an empty list or deleting the head node
- Q6. One question was related to binary search.
- Q7. Few more questions related to java.
- Q8. The architecture of the current system.
- Ans.
The current system follows a microservices architecture.
The system is divided into multiple independent services.
Each service has its own database and communicates with other services through APIs.
The architecture allows for scalability and flexibility.
Examples of microservices used in the system include user authentication, payment processing, and inventory management.
- Q9. Find the total no of the island in a 2d matrix. Working code was required.
- Ans.
Find the total no of islands in a 2D matrix.
Use DFS or BFS to traverse the matrix.
Mark visited cells to avoid repetition.
Count the number of islands found.
- Q10. Find loop in a linked list.
- Ans.
Loop detection in a linked list.
Use two pointers, one moving at twice the speed of the other.
If there is a loop, the faster pointer will eventually catch up to the slower one.
If there is no loop, the faster pointer will reach the end of the list.
Interview Preparation Tips
Skills evaluated in this interview
(2 Questions)
- Q1. Node JS internal
- Q2. Previous project discussion
I applied via Naukri.com and was interviewed in May 2021. There were 3 interview rounds.
Interview Questionnaire
1 Question
- Q1. Data Structures related 2 round & 1 round system Design
Interview Preparation Tips
Selected
I applied via Recruitment Consulltant and was interviewed before Mar 2022. There were 5 interview rounds.
Mettle Test based on DP based approach
(1 Question)
- Q1. Based on Tree, Graph, Segment Tree
(1 Question)
- Q1. DS algo based on DP, Trees, Graphs
(3 Questions)
- Q1. Systed Design Round 1
- Q2. Design a Distributed Queue to have functionality similar to Kafka.
- Ans.
Design a distributed queue similar to Kafka.
Use a distributed architecture with multiple brokers and partitions.
Implement a publish-subscribe model for producers and consumers.
Ensure fault tolerance and high availability through replication and leader election.
Use a log-based storage system for messages and offsets.
Provide support for message ordering and retention policies.
Implement a scalable and efficient message de...
- Q3. Design Price Tagger System
- Ans.
Design a Price Tagger System
Identify the products to be tagged with prices
Determine the pricing strategy (e.g. cost-plus, value-based, etc.)
Choose the appropriate tagging technology (e.g. barcode, RFID, etc.)
Develop a user-friendly interface for tagging and updating prices
Implement a database to store product and pricing information
Integrate with point-of-sale systems for accurate pricing at checkout
Interview Preparation Tips
Skills evaluated in this interview
Selected
I applied via Referral and was interviewed before Mar 2023. There was 1 interview round.
Basic coding test from hackerearth.
(1 Question)
- Q1. Design Search Systems
- Ans.
Designing search systems involves creating efficient algorithms and data structures to quickly retrieve relevant information.
Understand the data structure of the search system (e.g. inverted index, trie)
Implement efficient search algorithms (e.g. binary search, hash tables)
Consider scalability and performance optimization techniques (e.g. caching, indexing)
Include user-friendly features like autocomplete and spell corr...
Skills evaluated in this interview
Selected
I applied via Referral and was interviewed before Jan 2023. There were 3 interview rounds.
(2 Questions)
- Q1. Rotate matrix by 90 degree
- Ans.
Rotate a matrix by 90 degrees.
Transpose the matrix
Reverse each row of the transposed matrix
- Q2. Longest substring with unique characters
- Ans.
The question asks for finding the longest substring in a given string that contains only unique characters.
Iterate through the string and keep track of the current substring
Use a set to check for duplicate characters
Update the longest substring if a longer one is found
(1 Question)
- Q1. A trie question
Ecommerce hight level design
Interview Preparation Tips
Skills evaluated in this interview
Avinash Naidu
Selected
I applied via Recruitment Consulltant and was interviewed before May 2023. There were 2 interview rounds.
Its mcqs where we need to answer 25 questions
(1 Question)
- Q1. Knowledge if sql based on experience. Good to know joins well
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