ClearTrail Interview Experience

First Round: Group Technical Question Answers

• what is Sorting? types, complexities, the difference between nLogn and n2, how to draw a graph of nLogn?
• TCP/IP and UDP: differences and live examples of both
• Process and processor: single-core quad-core dual-core and multiprocessing life cycle of the process.

Second Round: Technical and Resume Based.

• Tell me something about yourself?
• String related questions, String pool String buffer String builder And String difference and how internally string works in the memory pool.
• What is immutable? design an immutable class by yourself.
• What is singleton class? design it
• Along with this they also asked about design patterns in java but I denied as I don’t know it
• Rate yourself on collections in java?
• What is generics in java
• The difference between vector, LinkedList, and ArrayList in java when to use it.
• What is serialization?
• The difference between an interface and abstract classes new java 8 feature default methods etc.
• Check whether an element is present in both arrays if posses then write it?

  Input: 2 2 3 3 5 and   1 2 3 4 5
  Output:  2 3 5

  naive n2 optimize n in next round.

• Check whether an array is sorted or not it is in dec or ascending both are sorted we need to check both?
• Recursion question find n odd integers by recursion
• One two more programming questions I don’t remember now.
• Some questions on resume projects how you made that whats your role and some general questions HR type.

Third Round: Hr and Technical round it was.

• How was your day? and hows the last round?
• Tell me the questions you had in last round.

I told them all programming questions and asked me to optimize one of them that I did use a hashmap. Then another interviewer came and he tried to pressurize me and give me a question to design an app like WhatsApp and told me I don’t think so you will do it this app going to fail for sure. He is constantly interrupting, but I considered all the features list it down and add some extra features that I personally want to add in a WhatsApp.

They come to my projects and then asked me why you don’t use elastic search instead I told something about elastic search then they told me to study for half an hour and come back. I study thoroughly what is it and how it is used and why it is used? n told them.

It’s done! finally, at last, that interviewer who pressurized me gave me compliments on my confidence and asked some more questions like.

• Why we hire you?
• If you have an offer from another organization will you join that?

I consider all the factors and answered them.

Tip: Be confident! maintain a smile on your face, answer every question positively. Don’t be nervous, all the best!.

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