Cleartrail Technologies interview experience Real time questions & tips from candidates to crack your interview

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Cleartrail Technologies

1 rounds | 3 Coding problems

Anirban Dutta

Fresher | Feb 2019

Selected

Interview preparation journey

Preparation

Duration: 1.5 Months

Topics: Data Structures and Algorithms, Operating System, Computer Networks, Security, and Authentication.

Tip

Always be confident in front of the interviewer but don’t be overconfident. Also for interview preparation, I took course from CodingNinjas which was a game-changer for me as I got to know all the important concepts and questions which are asked in interviews.

Application process

Where: Campus

Eligibility: 6.5 CGPA

Resume tip

Be honest on resume. Keep it subtle. Even if you are a good Competitive programmer, don’t brag during interviews.

Interview rounds

Round

Easy

Face to Face

Duration25 minutes

Interview date2 Feb 2019

Coding problem3

This was face to face interview round. All questions asked by the interviewer were based on data structures.

1. Detect loop

Moderate

15m average time

80% success

0/80

Asked in companies

Detect loop in linked list.

Problem approach

I told the interviewer about two pointers approach that is using the concept of the slow and fast pointer. Then he asked me to write its code which I wrote very neatly with comments in the code.

Try solving now

2. Tree Symmetricity

Easy

20m average time

82% success

0/40

Asked in companies

Given a binary tree, check whether it is a mirror of itself.

For example, this binary tree is symmetric:

/ \

2 2

/ \ / \

3 4 4 3

But the following is not:

/ \

2 2

\ \

3 3

Problem approach

I just give recursion based approach to the interviewer by checking the current root and calling the recursion on the left and right part. Also after the discussion of approach I wrote its functional code to the interviewer.

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3. Anagram Pairs

Moderate

30m average time

60% success

0/80

Asked in companies

Check whether two given strings are anagram or not.

Problem approach

I firstly gave sorting and comparing solution, but he asked me to optimize it so I gave him a hashing based solution and he was satisfied by my approach.

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