How to interview a java developer?

Question

Java

Hello! And have a great day.
I am a web developer (php and all outgoing kit).
There was a need to interview a java programmer for the corresponding vacancy.
The desired level is middle) But we are also considering promising juniors (so to speak for growth :))
Questions:
What questions are best for him to ask? By java.
And what is the best test task to give?
Thanks to all.

Answer 1

Ask someone with slightly more java knowledge than the intended candidate to help you. And that will be crap. There are a lot of questions (google), the problem is that you will not always understand whether the answer was correct or not. Since the correct answer, corny, is not always one.

Answer 2

As a junior level PHP developer, the interview will fail 100% of the time.
If your level is middle or senior, then you would hardly ask such a strange question.
I would just ask a familiar Java developer to come, or organize a video conference with him.
There is some chance to hire a junior java developer by asking him general theoretical questions (the difference between a class and an interface, what is DI, REST / SOAP, how does http work, write an SQL query on several tables, what is the difference between AR and DM).
After that, give a paid test task for the desired technology stack.

Answer 3

As an option, give a test task that corresponds to the tasks that a java developer will have to solve. Check to see if it "works". If it works, then send the code to a familiar java developer for verification. If he says that everything is normal, then invite him for an interview and talk to him already as a person (for adequacy).
Simply flooding with questions about java without understanding it is not an option, since there can be many correct answers, and a counter question can be caught on the topic.

Answer 4

well, talk about the concepts, about the difficulties that the person faced, what solutions he used, about his preferences, about how he solves problems.
after all - you call yourself a web developer, don't you have anything to ask another developer????