extended fan-out architecture with DynamoDB being the data producer — In my current project as a lot of business needs were unfolding that would require listening to various types of changes/updates on DynamoDB table (single table), I couldn’t handle all of those using just a single DynamoDB stream that comes with the table. DynamoDB stream can connect to maximum two…

Recently I applied for a Cloud Engineering role at a company. As a first step, they invited me to a Hackerrank cloud dev test. In the test, there were one coding problem (specific to Python) and two bash scripting problems. …

Solve it by Lambda attached to an SNS topic — You have a custom logger in place for a lambda function in your AWS account and this logger writes JSON records to CloudWatch through that lambda log group. Now out of all these log records being dumped in the log group, you want to send all logs that contain the…

I was given this in one big-tech online coding assessment — Recently I applied to one of the big-tech companies software engineering role. They came back to me with an online assessment in hacker rank. Two coding problems were given in that assignment. In this blog post I will share one of them. Problem description One online education platform (named OEP)…

I was given this problem in an online coding assessment — Problem description An anagram is a word whose characters can be rearranged to create another word. Given two strings, determine the minimum number of characters in either string that must be modified to make the two strings anagrams. …

leverage AI tools to come prepared for your upcoming interview — One of the concerns that I always have before the first round of either technical or introductory interview is what is the list of questions I should ask to the interviewer. Usually I have one or two questions prepared to ask to the interviewer. …

CodeSignal python coding test from a recruiting agency — This problem appeared in an online coding test hosted in CodeSignal. I was talking to a recruiting agency. To measure the competency of my python skill, they gave me this coding test with three coding problems. Out of three, this one was most interest. …

AppSync vtl and DynamoDB Case study — In our mobile application development work, we wanted to ensure each user had a unique username. However, we encountered some users who selected usernames that we deemed unsuitable, such as test, tests, testing, usernames containing our company’s name, and so on. To prevent this, we decided to block certain usernames…

Leetcode hard (it’s all about prime factors though) — Problem Description You are given a 0-indexed integer array nums of length n. A split at an index i where 0 ≤ i ≤ n-2 is called valid if the product of the first i + 1 elements and the product of the remaining elements are coprime. For example, if…