conceptual

This question already has an answer here: Interface vs Abstract Class (general OO) 34 answers I have searched around SO as well as the rest of the web for a good answer but I have't found one that I really understand. I am going to present this in a different way and hopefully the answers will help others as well. As far as I understand, the two concepts have the same rules except an abstract class is more flexible due to the method implementation ability. Also, I am aware you can implement multiple interfaces and only extend a single class but I'm sure there are more differences than the two

I understand that PowerShell piping works by taking the output of one cmdlet and passing it to another cmdlet as input. But how does it go about doing this? Does the first cmdlet finish and then pass all the output variables across at once, which are then processed by the next cmdlet? Or is each output from the first cmdlet taken one at a time and then run it through all of the remaining piped cmdlet’s? You can see how pipeline order works with a simple bit of script: function a {begin {Write-Host 'begin a'} process {Write-Host "process a: $_"; $_} end {Write-Host 'end a'}} function b {begin

How do i show the use of static methods in a UML class diagram? class A{ public static void test(){ } } class B{ public void b(){ A.test(); } } How would a class diagram look like, which shows the relationship? UML 2.0 would be prepared, if there is a difference. To show a static method you underline the name of the static method - have a look here for more detailed info. As for navigating that relationship; class B is dependent on the existance of class A . We can say that class B has a "usage dependency" on class A class B ----uses----> class A Hope this helps. umlcat @RobertMS is right.

In Java, Do objects encapsulate data so that not even other instances of the same class can access the data? Only when the keyword "private" is used? What are "accessor methods" in Java - methods like getName()? Thanks I don't tend to think of it in terms of one object having access to another, but rather what code has access to what data within an object. In Java (and C#, btw) code within a class has access to the private members of any object of the same class. Then you've got package/assembly access and public access. The tricky one is protected access, which is sort of access to code in

Am I correct that async/await itself has nothing to do with concurrency/parallelism and is nothing more than continuation-passing style (CPS) implementation? And the real threading is performed by SynchronizationContext instance that await passes/restores? If that is correct I have the following question about SynchronizationContext : it guarantees that a continuation will be executed on the same thread. However, are there any guaranties that the thread's context information is persisted? I mean Name , CurrentPrincipal , CurrentCulture , CurrentUICulture , etc. Does it depend on framework (ASP