Oracle SDE Interview Questions and Answers

Q1. Find minimum no. of increment operations to make array unique
Ans. 
To make an array of strings unique, count the number of duplicate elements and increment them accordingly.
• Iterate through the array and keep track of the frequency of each element.

• For each duplicate element, increment it to make the array unique.

• Return the total number of increment operations needed.
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Q2. Given a binary tree whose every node value is a number. find the sum of all the numbers that are formed from root to leaf paths
Ans. 
Sum all numbers formed from root to leaf paths in a binary tree
• Traverse the tree from root to leaf nodes, keeping track of the current number formed

• Add the current number to the sum when reaching a leaf node

• Recursively explore left and right subtrees
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It consisted of both technical programming and theoretical concepts. C++ and SQL

Q1. Consisted of scenario based questions from technical domain.
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Q2. Differentiate all sorting algorithms
Ans. 
Sorting algorithms differ in their approach to sorting elements in an array.
• Bubble Sort - compares adjacent elements and swaps them if they are in the wrong order

• Merge Sort - divides the array into two halves, sorts them, and then merges them

• Quick Sort - picks a pivot element and partitions the array around the pivot

• Selection Sort - repeatedly selects the minimum element and swaps it with the current element

• Insertion S...read more
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Q1. Simple resume related non technical.
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DSA,COMPUTER FUNDAMENTALS

Q1. TELL ABOUT TREE TRAVERSALS
Ans. 
Tree traversals are methods used to visit each node in a tree data structure in a specific order.
• Inorder traversal: Visit left subtree, then root, then right subtree

• Preorder traversal: Visit root, then left subtree, then right subtree

• Postorder traversal: Visit left subtree, then right subtree, then root
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Go through the basics of all the topics the electronics part of the exam will be tough

Q1. Know each and everything about your project
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Puzzle based questions and Math problems

Given a laptop and problem statement. Had to solve problems at eclipse.

Q1. F2F one on one technical interview
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