SBI Cards & Payment Services Computer Engineer Interview Questions and Answers

It was a take home OA

Build a chess board using react

Behavioural and culture fit

2 hours long was the coding round

Q1. Nothing simple working hours related
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Q2. Certification questions only
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Q3. About your location and all
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Q1. Flatten a tree in right preorder
Ans. 
Flatten a tree in right preorder
• Traverse the tree in right-preorder (root, right, left)

• Use a stack to keep track of nodes

• Pop nodes from stack and add to result array
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HackerEarth / Hacker rank Test

Q1. Find the lowest cost when given days you want to use metro if you have cost of a day 1 ,7 and 30 day pass. DP Problem
Ans. 
Using dynamic programming to find the lowest cost for metro passes based on given days.
• Create an array to store the minimum cost for each day.

• Iterate through each day and calculate the minimum cost based on 1, 7, or 30 day pass.

• Update the minimum cost for each day using dynamic programming.

• Return the minimum cost for the total number of days needed.
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Q1. Normal HR Questions
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Core java , string, thread , sql, mvc, spring boot

Q1. 2 coding questions on array and string
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Q2. Sorting , thread
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Q1. Managerial round
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Q2. Project and some basic questions
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Q3. Describe your project
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Asked a few Leetcode style questions

So there were 3 coding question on Codility platform. I solved 2.7 questions and i got an interview call

Q1. Write a program to find 2nd highest number in an unsorted array.
Ans. 
Program to find 2nd highest number in an unsorted array.
• Sort the array in descending order and return the second element.

• Iterate through the array and keep track of the two highest numbers.

• Handle edge cases like duplicates and small array sizes.
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Q2. Write a query to find the common values from two SQL tables.
Ans. 
Use SQL JOIN to find common values in two tables.
• Use INNER JOIN to combine the two tables based on a common column

• Select the columns you want to display in the result

• Add a WHERE clause to filter out non-matching values
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