Valyx Engineer Trainee Interview Questions and Answers

Q1. Projects, previous work , dsa and database
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Q1. System design , dsa
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Q1. Behavioural, system design
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Q1. General discussion , salary
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Q1. 2Sum DSA leetcode problem
Ans. 
2Sum problem involves finding two numbers in an array that add up to a specific target.
• Use a hashmap to store the difference between the target and each element in the array.

• Iterate through the array and check if the current element's complement exists in the hashmap.

• Return the indices of the two numbers that add up to the target.
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Q2. Spiral traversal of a Binary tree
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Spiral traversal of a Binary tree involves visiting nodes level by level alternating between left to right and right to left.
• Start by pushing the root node into a queue.

• While the queue is not empty, pop a node, print its value, and push its children into the queue.

• Alternate between popping nodes from the queue and printing their values in a spiral manner.
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Q1. A problem similar to coin change problem of leetcode
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The coin change problem involves finding the number of ways to make a certain amount using given coin denominations.
• Dynamic Programming Approach: Use an array to store the number of ways to make each amount up to the target.

• Example: For coins [1, 2, 5] and target 5, ways are: 5 (1x5), 2+2+1, 2+1+1+1, 1+1+1+1+1.

• Base Case: Initialize dp[0] = 1, as there's one way to make 0 amount (using no coins).

• Iterate through each coi...read more
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Q2. Aggressive cows problem
Ans. 
The aggressive cows problem involves finding the maximum distance between cows in a field while ensuring they are not too close to each other.
• Use binary search to find the maximum distance between cows.

• Sort the cows' positions and check if a certain distance is feasible.

• Consider the constraints of the problem such as the number of cows and the size of the field.
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Q1. Basic behavioural questions like why I am looking for a change and would I be able to handle the increased work pressure as I was shifting from MNC to a startup
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Q1. Questions Based on skills , previous experience etc.
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Q2. Basic HR questions...
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Q1. Introduce yourself
Ans. 
I am a software developer with 5 years of experience in Java, Python, and SQL.
• 5 years of experience in Java, Python, and SQL

• Worked on developing web applications using Java Spring framework

• Proficient in database management with SQL
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Q2. Brief about projects you have worked
Ans. 
Developed web application for online shopping platform with user authentication and payment gateway integration.
• Implemented user authentication using JWT tokens

• Integrated payment gateway APIs for secure transactions

• Designed responsive UI for seamless user experience
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Q1. Challenging situation you have encountered
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Q1. Describe the actions you took to address the chanllenge
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Contained three parts, DA, Excel test, and editing test

Q1. Need to have a good knowledge of excel
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Q1. Xl sheet and typing speed
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Q2. How many years u hv experience in xl
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Three fundamental questions related to Data Structures and Algorithms.

Q1. Design and implement LRU cache?
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