Paylocity Senior Software Engineer Interview Questions and Answers

Q1. How does the CAN TP (Controller Area Network Transport Protocol) work?
Ans. 
CAN TP is a protocol used for transferring large data packets over Controller Area Network.
• CAN TP breaks large data packets into smaller segments for transmission

• It uses flow control mechanisms to ensure all segments are received and retransmits if necessary

• CAN TP is commonly used in automotive and industrial applications
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Q1. Explain autosar layer
Ans. 
AUTOSAR (Automotive Open System Architecture) is a standardized software architecture for automotive systems.
• AUTOSAR is a layered architecture consisting of four layers: Application Layer, Runtime Environment (RTE) Layer, Basic Software Layer, and Microcontroller Abstraction Layer (MCAL).

• Each layer in AUTOSAR has specific responsibilities and interfaces with other layers to ensure modularity and reusability of software...read more
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Q1. Are you prepared to work from home?
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Q1. Write polyfill for array map
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Q1. Get minimum from stream. Query based.
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Q2. Minimum number of platforms for trains. Arrival n departure time is given.
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Q1. Design Instagram feed
Ans. 
Designing Instagram feed involves displaying user's photos and videos in a visually appealing and user-friendly manner.
• Display user's posts in a grid layout with images/videos and captions

• Allow users to like, comment, and share posts

• Implement infinite scrolling to load more posts as user scrolls down

• Include a search bar to search for specific users or hashtags
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A code to identify errors and write Junit. Optimise the code as well.

Q1. Stacks using queue
Ans. 
Implementing a stack using two queues
• Use two queues to simulate a stack

• Push operation: Enqueue the element to queue 1

• Pop operation: Dequeue all elements from queue 1 to queue 2, dequeue the last element from queue 1, then swap the queues

• Top operation: Return the front element of queue 1

• Example: Push 1, 2, 3 - Queue 1: [1, 2, 3], Queue 2: []

• Example: Pop - Queue 1: [1, 2], Queue 2: [3]
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Q2. BFS and Knapsack problem, previous project experience
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Full stack question with java and angular and sql

Case study on project

Q1. MVVM, struct vs class, method dispatch
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Debugging swift code

Q1. Behavioral questions - what is hour worst trait regarding work.
Ans. 
My worst trait regarding work is perfectionism.
• I tend to spend too much time on small details, which can delay project deadlines.

• I have difficulty delegating tasks because I want everything done perfectly.

• I can be overly critical of my own work and the work of others.
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Q1. What do you know about ModMed
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