Most probably, yes. A lot of these are fundamental concepts of most modern object-oriented languages that I am familiar with. It may be worth refreshing your basic programming skills/concepts with a book you like. There are plenty available online for free in C#, Java, C++, Go, etc.

The song “1985” was released in 2004. At that time, the song was reminiscing about a time that was 19 years ago. Now, in 2024, the year 2004 is 20 years ago. Therefore, the release year of the song “1985” is closer to the year 1985, than the current year is to the year the song “1985” was released (2004).