Lekha Wireless Solutions Software Developer Interview Questions and Answers

Q1. Core Java related
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Q2. SPRING BOOT related
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The online round consists of DSA, OS and Networking questions

Very good but easy
easy question long question

Q1. Java codingg on sql programming
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Q2. Colection framework java concept
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Basics of array strings

Q1. Basics of java, networking
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Q1. About yourself , why stl about relocation
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Q1. Transformer is a static device and transfer power one from to another form current
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Q2. Current transformer is a series conection and step up to high voltage
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Q3. There are three function of smart grid electrical protection isolation and control
Ans. 
The three functions of smart grid electrical protection isolation and control are fault detection, fault isolation, and service restoration.
• Fault detection involves identifying any issues in the electrical system.

• Fault isolation involves isolating the faulty component to prevent further damage.

• Service restoration involves restoring power to the affected area as quickly as possible.

• Examples of smart grid technologies th...read more
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Q4. Current is a flow in wire
Ans. 
Yes, current is the flow of electric charge in a wire.
• Current is measured in amperes (A).

• It is caused by the movement of electrons in a conductor.

• The direction of current flow is from positive to negative.

• Current can be either direct current (DC) or alternating current (AC).
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Q5. Faraday law is a electro magnetic field induction working
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Q6. Ohm's law is current between directly proportional voltage
Ans. 
Ohm's law states that current is directly proportional to voltage.
• Current increases as voltage increases

• Resistance remains constant

• Can be expressed as I = V/R
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SQP, PRS, SRT, TUV, is right answer VXW

Assigned data analysis project

Q1. Tell me about your self
Ans. 
I am a passionate software engineer with experience in developing web applications using various technologies.
• Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

• Proficient in backend development with Node.js and databases like MongoDB and MySQL

• Familiar with version control systems like Git and project management tools like Jira
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Q2. Tell abt the projects
Ans. 
Developed a web application for tracking inventory and sales data
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express

• Utilized MongoDB for database management
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Round duration - 40 Minutes
Round difficulty - Medium

Round 1 was mainly focused on data structures and algorithms ,core java concepts and dbms

Q1. You are given a string. What is the minimum number of characters that need to be inserted to convert it into a palindrome?
Ans. 
The minimum number of characters needed to convert a string into a palindrome is the length of the string minus the length of the longest palindromic subsequence of the string.
• Find the longest palindromic subsequence of the given string.

• Subtract the length of the longest palindromic subsequence from the length of the original string to get the minimum number of characters needed to convert it into a palindrome.
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Round duration - 40 to 50 min
Round difficulty - Medium

Focussed mainly on projects and system design

Round duration - 30 Minutes
Round difficulty - Medium

Managerial round

Round duration - 20 Minutes
Round difficulty - Easy