PTC Associate Software Analyst Interview Questions and Answers

Q1. Large scale system design interview
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Two DSA questions related to Arrays & strings

Q1. Design URL shortener
Ans. 
Design a URL shortener service with features like shortening, redirecting, tracking, handling collisions, and providing analytics.
• Use a hashing algorithm to generate unique short URLs from long URLs

• Store mappings of short URLs to original URLs in a database

• Implement a redirect mechanism to direct users to the original URL when accessing the short URL

• Track the number of times each short URL is accessed and store this da...read more
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Q1. SOLID Principles
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Karet Interview :
5 back to back System design question, we don't need to explain each component but more like list as many as points. Need to finish all the question in 15min

1-2 problem solving question : It's not fency algorithm round with tough question. But true problem solving round using basic knowledge such as hashmap, heap

Q1. Design File System : You have given file size and collection in input 1 : get total size 2 : find top k collections in size
Ans. 
Design a file system to calculate total size and find top k collections in size.
• Create a file system class with methods to add files and calculate total size.

• Maintain a data structure to store the collections and their sizes.

• Implement a method to find the top k collections based on size.

• Consider using a priority queue or sorting the collections based on size.

• Handle edge cases like empty collections or invalid input siz
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Q2. Find total size
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Calculate the total size of an array of strings.
• Iterate through the array and sum the length of each string.

• Use the `length` property of each string to get its size.

• Handle edge cases such as empty strings or null values.
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Q3. Find Top k collections
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The question is asking to find the top k collections.
• Use a sorting algorithm to sort the collections in descending order based on a specific criteria.

• Select the top k collections from the sorted list.

• Return the selected collections as an array of strings.
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Q1. Project details question
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Q1. Technical interview includes questions in dotnet core, C# , angular and SQL. It includes questions like middleware,startup.cs file configuration, dependency injection,cors and char frequency counter progra...read more
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Q1. In this round we had discussion regarding previous company project and ReactJS including concepts like life cycle , hooks and state management. It also includes scenario based questions related to team man...read more
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Q1. Mostly about yourself and salary discussion
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2 Coding questions, 1 SQL and a few MCQs.

Q1. Given a String find the lexicographically lowest substring containing k number of 1s
Ans. 
Find the lexicographically lowest substring with k 1s in a given string.
• Iterate through the string and maintain a sliding window of size k.

• Keep track of the count of 1s in the window and update the result if a valid substring is found.

• Return the lexicographically lowest substring with k 1s.
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Q2. Given to solve SQL Questions based on Join and group by.
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Q1. Technical Discussion
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Q2. Questions based on operating Systema and OOPs
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Q3. Difference between Abstract class and interface
Ans. 
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructors, fields, and methods, while interface cannot have any implementation.

• A class can only extend one abstract class, but can implement multiple interfaces.

• Abstract classes are used to define a common behavior for subclasses, while interfaces are used to define a contract for cl...read more
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Q4. Process Synchronisation
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Q5. Was asked what project would I take up if I get funded and list the challenges of taking up the project.
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Q1. Just Basic HR Questions
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It was an aptitude round

Q1. In technical round i was asked some data structure problems
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Aptitude+ coding questions

Q1. Online face to face coding tets
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Q1. Didn't attend the round
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