Published inAWS in Plain English·PinnedMember-onlyCreate Single Eventbridge Rule for Uploads on Multiple S3 BucketsWith the purpose of triggering a lambda to store metadata in DynamoDB — In my current work, I had to find a way to trigger a single lambda based on the file uploads on two separate buckets. The purpose of triggering the lambda is to update the DynamoDB table with file/object metadata. One obvious solution is to create two lambda functions where each…AWS2 min readAWS2 min read
Published inAWS in Plain English·PinnedMember-onlyWhy did I enable Kinesis Data Stream on my DynamoDB tableextended 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…AWS4 min readAWS4 min read
Published inNerd For Tech·PinnedMember-onlyTwo bash scripting problems for a Cloud dev hiring testRecently 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. …Bash4 min readBash4 min read
Published inAWS in Plain English·PinnedMember-onlyCloudWatch Log Records— Send Critical Ones to a Slack ChannelSolve 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…AWS3 min readAWS3 min read
Published incoding interview preparation·Oct 13Member-onlyCoding assessment in an AI companyI love the problem story — Problem : Efficient Scaling I was given the following problem in an online coding assessment. I love this problem because it presents a classic algorithmic problem with a story of cloud computing and distributed system. A data processing pipeline consists of n services connected in a series where the output…Binary Search4 min readBinary Search4 min read
Published incoding interview preparation·Sep 24Member-onlyCoding problem: maximum subarray productI 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)…Online Coding Assessment3 min readOnline Coding Assessment3 min read
Published incoding interview preparation·Sep 7Member-onlyCoding problem: Anagram differenceI 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. …Python2 min readPython2 min read
Published incoding interview preparation·Jul 24Member-onlyHow chatGPT helped me prepare questions towards interviewer?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. …ChatGPT3 min readChatGPT3 min read
Published incoding interview preparation·Jul 5Member-onlyCoding problem on digit anagramCodeSignal 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. …Codesignal3 min readCodesignal3 min read
Published inAWS in Plain English·Apr 22Member-onlyHow to Prevent App Users to have reserved usernamesAppSync 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…AWS3 min readAWS3 min read
