HDFC Bank Senior Software Developer Interview Questions and Answers

Q1. 1. Power BI, 2. SQL,
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Q2. 3. Azure and 4. Excel.
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Q1. Difference between list and tuple
Ans. 
List is mutable, tuple is immutable in Python.
• List can be modified after creation, tuple cannot.

• List uses square brackets [], tuple uses parentheses ().

• List is used for collections of items that may change, tuple for fixed collections.

• Example: list - [1, 2, 3], tuple - (1, 2, 3)
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Simple algorithm question about sorting

Q1. Algorith question about quick sort
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Q2. Nlonn run time of the sort
Ans. 
The time complexity of the quicksort algorithm is O(n log n).
• Quicksort has an average time complexity of O(n log n).

• The best case time complexity of quicksort is O(n log n) when the pivot element divides the array into two equal halves.

• The worst case time complexity of quicksort is O(n^2) when the pivot element is the smallest or largest element in the 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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Q1. How to find out prime number
Ans. 
Prime numbers are numbers that are only divisible by 1 and themselves.
• Start by checking if the number is less than 2, as prime numbers start from 2.

• Iterate from 2 to the square root of the number and check if the number is divisible by any of these numbers.

• If the number is not divisible by any number in the range, then it is a prime number.
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Joins, Jobs, stored procedures,cursors.

Q1. What is my package
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Basic data structure related coding questions like creating a linked list and adding items to it median.
Max heap implementation.
Concurrency related questions.

Q1. Senior developer was taking the round, covering all design and architecture related questions. I was able to give a satisfactory solution.
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Q1. Just some behavioural question along with a lil bit technical questions. Asked me about my current projects and problems faced, how i gave a proper solution and how i help my team to grow.
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General knowledge and development skills and new things..