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How to Trigger AWS Lambda After Uploading 7 Files to S3: A Smart Event-Driven Architecture

Jun 29, 2025

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AWS

DB2 Check Vs. Default Constraint Top Differences

Check and Default constraints are both not the same. They create during create Table. Differences between these you can understand with these examples. Read More ⇢
Exclusive Loops Vs Iterators in Python

Loops and iterators are two unique concepts. But the outcome is the same. Here are details explained with simple examples. Read More ⇢
How to Read Array and Print in Bash script

Here’s a simplified script to read all the elements of the array. You can do two things with this script. Those are appending and Counting. Read More ⇢
How to Change Default Shell In Ubuntu

Here’s a simple command that you can use to change shells. It’s useful to work with multiple shells at a time. Read More ⇢
How to Resolve -206 SQL Error Object-Not-Valid in DB2

Here is a resolution for SQL error -206. You will get an error of object is not valid. Here are possible reasons for this error. Also given solution for how to fix it. Read More ⇢
3 File Descriptors in Unix Operating System: What They Mean

How to use file descriptors in Unix is explained in this post. Unix supports three types. Here is an example that shows how it works. Read More ⇢
Shell Script Tricky Question – Duplicate Functions

Here is a tricky shell script question. What happens if you give duplicate function names in the script. Read More ⇢
13 Tricky AWS Simple Workflow Interview Questions

Here are 13 tricky AWS Simple workflow service interview questions. These are useful for AWS interviews. Read More ⇢
Important Things to Consider Before Buying a House or Selling Land

Here are two top formulas you can use to decide how to buy a house. Also, it helps to sell land. These are useful for everyone. Read More ⇢