Relanto Global Data Engineer Interview Questions and Answers

Round duration - 60 minutes
Round difficulty - Easy

Technical interview round with questions on DSA and DBMS mainly.

Q1. 
Maximum Sum Subarray Problem Statement
Given an array ARR consisting of N integers, determine the sum of the subarray with the maximum sum, including the possibility of an empty subarray.
A subarray is a...read more
Ans. 
Find the sum of the subarray with the maximum sum in a given array.
• Iterate through the array and keep track of the current sum and maximum sum.

• Update the maximum sum if the current sum becomes greater.

• Handle cases where the array has all negative numbers or empty subarray.

• Example: For input [-2, 1, -3, 4, -1], the maximum sum subarray is [4] with sum 4.
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Q2. 
Prime Numbers Identification
Given a positive integer N, your task is to identify all prime numbers less than or equal to N.
Explanation:
A prime number is a natural number greater than 1 that has no po...read more
Ans. 
Identify all prime numbers less than or equal to a given positive integer N.
• Iterate from 2 to N and check if each number is prime

• Use the Sieve of Eratosthenes algorithm for efficient prime number identification

• Optimize by only checking numbers up to square root of N for divisibility
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Q3. What are Joins in the context of databases?
Ans. 
Joins in databases are used to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables based on a related column.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• INNER JOIN returns rows when there is at least one match in both tables.

• LEFT JOIN returns all rows from the left table and the matched rows from the right ta...read more
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Round duration - 30 minutes
Round difficulty - Easy

Typical HR round with behavioral problems.

Hackerrank Test

Q1. Questions related to NodeJS and Javascript Basics
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Q1. Technical questions based on past experience
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Q1. Company Culture related
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Q1. Expectations and Processes
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The aptitude test was of moderate level.

It checked on the concepts of oops

Q1. How will you deal with tight delivery time.
Ans. 
I will prioritize tasks, communicate effectively with team members, and utilize time management techniques to meet deadlines.
• Prioritize tasks based on importance and urgency

• Break down tasks into smaller manageable chunks

• Communicate effectively with team members to coordinate efforts

• Utilize time management techniques such as Pomodoro technique or Agile methodologies

• Identify and eliminate any potential roadblocks or bott...read more
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This is the round in which basic quant questions were asked

In this round basic 2 java questions were asked

In this round one topic was given and we need to discuss about that topic

Q1. What is java explain in detail
Ans. 
Java is a high-level, object-oriented programming language used to develop applications for various platforms.
• Java is platform-independent, meaning it can run on any platform with a Java Virtual Machine (JVM)

• It is known for its security features, such as the ability to run code in a sandbox environment

• Java is used for developing a wide range of applications, from web applications to mobile apps and games

• It is also used...read more
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Q2. What is searching and sorting
Ans. 
Searching is finding a specific item in a collection of items. Sorting is arranging items in a specific order.
• Searching involves looking for a specific item in a collection of items.

• Sorting involves arranging items in a specific order, such as alphabetical or numerical.

• Searching and sorting are commonly used in computer science and data analysis.

• Examples of searching algorithms include linear search and binary search.

• E...read more
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Q1. What is binary tree explain
Ans. 
A binary tree is a data structure consisting of nodes, where each node has at most two children.
• Nodes in a binary tree have a left and/or right child node.

• The topmost node is called the root node.

• Binary trees are used in search algorithms and data compression.

• Examples of binary trees include binary search trees and heap trees.
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Q1. What is your current location
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Q2. What is your salary expectations
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