ClearTrail Technologies Interview Questions and Answers for Freshers

Q1. Need to find output of given code
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Q2. Solve some puzzles
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Q1. Complete Code for Ludo Game. Sort of Machine coding round.
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Q2. Given an array of intervals and return the minimum number of intervals you need to remove to make the rest of the intervals non-overlapping.
Ans. 
Remove overlapping intervals to minimize removals.
• Sort intervals by end time

• Iterate through intervals, remove overlapping intervals

• Return count of removed intervals
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I was asked to implement lru cache which i did but still didn’t made to next round as apparently i didn’t complete the working code though in my opinion i did

Q1. Implement Linked list
Ans. 
Linked list is a data structure where each node points to the next node.
• Create a Node class with data and next pointer

• Create a LinkedList class with head pointer

• Implement methods to add, remove, search, and traverse the list
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Q2. Implement Hash Map with array and linked list.
Ans. 
Implement Hash Map with array and linked list.
• Create an array of linked lists

• Hash function maps keys to array indices

• Insert key-value pairs into linked lists

• Handle collisions by chaining

• Search for a key by hashing and traversing linked list
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Q3. How to create a immutable class in java
Ans. 
To create an immutable class in Java, follow these steps:
• Make the class final

• Make all fields private and final

• Do not provide any setter methods

• Initialize all fields via constructor

• If any field is mutable, return a clone of it instead of the original object
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It has aptitude and coding based questions.For coding you can choose any coding language

There will be a GD for 7-10 people on random topic

Q1. 1st TR,ask to write a code of your preference.Linux commands,SQL
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Q1. 2nd TR ,ask about the projects you have done
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Q1. Basic HR round,where they will discuss about the company , job role etc
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Q1. Python, Django questions Easy to Medium level DSA Discussion on Project and previous work experience Some SQL queries
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Q1. Some Python questions and discussion on work experience Some design question like how you will design backend for some project from scratch Some managerial questions Questions on git
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Q1. Some basic HR questions
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Q1. About angular, basic to advanced
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Q2. About angular concepts. Also asked to write basic pseudo code
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Android basic + DSA and problem solving

Q1. Android in depth
Ans. 
Android is a mobile operating system developed by Google, based on the Linux kernel.
• Android is open-source and allows developers to create applications using Java or Kotlin.

• Android apps can be distributed through the Google Play Store or other third-party app stores.

• Android supports a wide range of devices, from smartphones and tablets to smart TVs and wearables.

• Android provides a rich set of APIs for accessing device ...read more
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