I've used these languages when I was learning Data Structures and programming. After moving to high-level languages, I didn't show interest to work on these. But if I want to write an algorithm from the scratch, I will still prefer these languages and use GCC compiler for C/C++.
It taught me Object-oriented programming. I've learned Core java and my first Linked List program was written using this. I haven't worked with big libraries and frameworks in Java but I have little hands-on experience in Struts 1.X, JSP, JDBC, and JavaFX.
It is one of my favorite programming languages, because it is a High-level programming language 😉. It helped me a lot when I was struggling to code. I've learned many programming concepts from Python and now I'm using it to learn ML basics and Data Science. I have good experience with the Pandas library which is used for Data Science. I have some real time experience with Python and I've build a Data cleaning tool with Invalid addresses correction using Google Maps API.
I've had basic hands-on experience with AWS and I worked with S3, EC2, IAM and DynamoDb.
I've learned MySQL and MongoDB for Web apps and have real time experience with CRUD operations.
I have a sound knowledge on Windows 7/10, Linux(Ubuntu/Fedora/CentOS) and OS X
I have basic knowledge in ML, Data science and NLP. Maximum time i am spending on those technologies to learn.