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

Software Engineer

HCL Technologies

2 rounds | 2 Coding problems

Siddhi

Experienced | Jul 2018

Selected

Interview preparation journey

Preparation

Duration: 3 months

Topics: Data Structures, Collections, OOPs, Algorithms, Dynamic Programming

Tip

Tip 1 : Do projects by yourself
Tip 2 : Practice Algorithms and Data Structures
Tip 3 : Good communication skills and patience

Application process

Where: Campus

Eligibility: 80+ percentage in 12th grade, Mathematics compulsory

Resume tip

Tip 1 : Do not put false information on resume
Tip 2 : Don't hesitate to clear your queries

Interview rounds

Round

Medium

Face to Face

Duration30 minutes

Interview date8 Jul 2018

Coding problem1

The interviewer was good and it went well

1. OS Questions

What are the types of OS available?
OS structure
What does kernal do

Problem approach

Tip 1 : Basic knowledge of OS
Tip 2 : Do practice codes for technical round
Tip 3 : Data Structures was most covered part during interview

Round

Hard

Online Coding Test

Duration90 minutes

Interview date8 Jul 2018

Coding problem1

Timings: 2pm -5pm
Environment was good
No significant activity
Interviewer was food

1. Check if two trees are Mirror

Easy

15m average time

85% success

0/40

Asked in companies

You are given two arbitrary binary trees consisting of N and M number of nodes respectively, your task is to check whether the two trees are mirror of each other or not.

Two trees are said to be mirror of each other, if

1. Roots of both the given trees are same.
2. Left subtree of the root of the first tree is the mirror of the right subtree of the root of the second tree.
3. Right subtree of the root of the first tree is the mirror of the left subtree of the root of the second tree.

For example,both the given trees are mirror image of each other: