RedBus Junior Engineer Interview Questions and Answers

Q1. What are the types of data.
Ans. 
Types of data include numerical, categorical, ordinal, and binary.
• Numerical data includes continuous and discrete values, such as height and age.

• Categorical data includes non-numeric values, such as colors and types of fruit.

• Ordinal data includes values with a specific order, such as rankings and ratings.

• Binary data includes only two possible values, such as true/false and yes/no.
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Q1. Core : DBMS , oops in depth coding: basic DSA questions based on Arrays, String.
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Q1. He asked me graph questions ( medium level ) based on a node to root, and min cost to target. note: if you really want to crack the yata.com interview practice graph question and they ask a leetcode questi...read more
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General reasoning and Mathmatics Aptitude

Q1. Core Java and Coding questions
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Q1. Data Structures and Theoretical Java and SQL concepts like - views, indexes, DML
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Programs on Sorting and Search Algorithms and Core Java

Q1. To find the kth minimum element from BST
Ans. 
To find the kth minimum element from a Binary Search Tree (BST)
• Perform an in-order traversal of the BST to get elements in sorted order

• Return the kth element from the sorted list

• Time complexity: O(n) where n is the number of nodes in the BST
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Q2. Basic OOPs question like inheritance encapsulation
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Q1. In a BST two numbers are swapped find swapped nos.
Ans. 
To find swapped numbers in a BST, perform inorder traversal and keep track of previous node.
• Perform inorder traversal of the BST

• Keep track of the previous node while traversing

• If at any point, the current node's value is less than the previous node's value, those are the swapped numbers
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Q2. What you did in college projects
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Q1. Puzzles: find the fastest 3 horses in 25 horse race with a race and 5 horses can be run at a time
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Q2. Weakness and strength. how a friend will describe you
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