Synodus Interview Questions and Answers

90 minute test on hacker rank consisting of 3 coding questions all of medium difficulty. Most candidates are required to solve more than 1 question.

Q1. Questions on concepts of OOPS and Operating Systems.
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Q2. Find least common ancestor of a binary tree.
Ans. 
Find the lowest common ancestor of a binary tree.
• Traverse the tree recursively from the root node.

• If the current node is null or matches either of the given nodes, return the current node.

• Recursively search for the nodes in the left and right subtrees.

• If both nodes are found in different subtrees, return the current node.

• If both nodes are found in the same subtree, continue the search in that subtree.
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Q3. Find first missing positive integer from an array for non-negative integers.
Ans. 
Find first missing positive integer from an array of non-negative integers.
• Create a hash set to store all positive integers in the array

• Loop through the array and add all positive integers to the hash set

• Loop through positive integers starting from 1 and return the first missing integer not in the hash set
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Q1. Design a parking lot
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Design a parking lot
• Consider the size and capacity of the parking lot

• Decide on the layout and organization of parking spaces

• Implement a system to manage parking availability and reservations

• Include features like ticketing, payment, and security

• Consider scalability and future expansion
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Q1. Given a grid which represents an ocean( For all index i,j if mat[i][j] = 1 is island and mat[i][j] = 0 means water). Find the island with largest area.
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Q2. Given list of strings group them into distinct anagrams.
Ans. 
Group list of strings into distinct anagrams.
• Create a hash table with sorted string as key and list of anagrams as value.

• Iterate through the list of strings and add each string to its corresponding anagram list in the hash table.

• Return the values of the hash table as a list of lists.
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The aptitude test consists of MCQ on computer technicals , english, verbals, etc as like usual aptitude test. Also it includes 2-3 sql queries to solve as well as 1-2 coding questions with easy to medium level difficulty.

Q1. Technical round was around 1 hour. They had asked me the technical questions related to computer fundamentals like networking, DS, OOP, etc. Then he went on java code and their programming basics like adap...read more
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Q1. HR was the telephonic round for me. They just asked normal hr questions like intro, strengths, weakness, location preferences, technologies on which i had worked on etc. They have also gave me the CTC info...read more
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Q1. It was went well they will ask some Basic quesadillas regarding the technologies that you have worked before.
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Q1. It will be like another round in interview process they will dig your knowledge about technologies a bit more.
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Q1. Core Java Questions on Stream API, Exception handling, Java 8 features and some questions from collections
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Q1. Small program to write and other questions on Spring, Spring Boot, Hibernate, JPA, jQuery and HTML & CSS.
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Q1. Basic discussion on salary expectations and other general discussion.
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A regular aptitude test containing Verbal, Quants, and coding. Practice from Indiabix and go or any other aptitude exams website. Depending on your score in these sections you'll be shortlisted for the applied role. For BAs usually, the Verbal section is checked more thoroughly.

2o min round split into two rounds of two different topics: 1 abstract and 1 more based on current affairs.

Q1. Questions based on the resume were asked. About my internships, how did I plan my tasks in one of them.
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Q2. A guestimate question was asked along with some riddles
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Q1. DS Algo, Backend and DB
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Q2. Stack(DS) question and DB based questions
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Q3. Scaling (Horizontal, Vertical) with use cases
Ans. 
Scaling refers to increasing capacity of a system. Horizontal scaling adds more machines, while vertical scaling adds more resources to a machine.
• Horizontal scaling involves adding more machines to a system to increase capacity

• Vertical scaling involves adding more resources to a machine to increase capacity

• Use cases for horizontal scaling include handling increased traffic or adding redundancy

• Use cases for vertical sca...read more
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Q1. Regarding the Past Projects, mine were with Firebase and Flutter.
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Q2. Medium DSA questions for Array and String and Flutter
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