How do you conduct a Java technical interview?

Top interview questions for a Java developer

1. Provide a clear introduction about your company and project.
2. Ask your candidate about previous work experience if available.
3. Give a simple programming problem for your candidate to solve.

Which collection class gives faster iteration and fast random access?

In a list, access to elements is faster in ArrayList as random access is also possible. Access to LinkedList elements is slower as it follows sequential access only. In a list, manipulation of elements is slower in ArrayList whereas it is faster in LinkedList.

How do you ensure that N threads can access N resources without deadlock?

How do you ensure that N threads can access N resources without deadlock? A very simple way to avoid deadlock while using N threads is to impose an ordering on the locks and force each thread to follow that ordering. Thus, if all threads lock and unlock the mutexes in the same order, no deadlocks can arise.

What are the screening questions for Java?

Java Basic Interview Questions

• Why is Java a platform independent language?
• Why is Java not a pure object oriented language?
• Pointers are used in C/ C++.
• What do you understand by an instance variable and a local variable?
• What do you mean by data encapsulation?
• Tell us something about JIT compiler.

Which collection is best in Java?

In most situations, an ArrayList is preferred over a LinkedList . LinkedList : A List backed by a set of objects, each linked to its “previous” and “next” neighbors. A LinkedList is also a Queue and Deque .

What is collections in java interview questions?

Collections in Java are capable of doing any data operations such as searching, sorting, insertion, manipulation, and deletion. A single unit of objects in Java is referred to as a collection. The two basic “root” interfaces of Java collection classes are the Collection interface (java.

Can a method be static and synchronized in Java?

You can also synchronize on this object manually if wanted (whether in a static method or not). These three methods behave the same, allowing only one thread at a time into the inner block: class Foo { static synchronized void methodA() { // } static void methodB() { synchronized (Foo.

What is the difference between notify and notifyAll in Java?

Notification to number of threads : We can use notify() method to give the notification for only one thread which is waiting for a particular object whereas by the help of notifyAll() methods we can give the notification to all waiting threads of a particular object.

What is the Java multithreading interview question?

This is a relatively tough Java multithreading interview question that serves many purposes. It checks whether a candidate can actually write Java code using thread or not. It sees how good a candidate is on understanding concurrent scenarios, and you can ask a lot of follow-up question based upon his code.

What are the interview questions to expect in Java?

Multithreading and concurrency questions are an essential part of any Java interview. If you are going for an interview with an investment bank, e.g. Barclays, Citibank, Morgan Stanley for an equities front office Java developer position, you can expect a lot of multithreading interview questions.

What is this thread interview question?

This thread interview question is mostly asked in the first round or phone screening round of an interview and purpose of this multi-threading question is to check whether the candidate is familiar with the concept of “join” method or not.

What are the problems with multithreading and concurrent programming?

Memory-interference, race conditions, deadlock, livelock, and starvation are an example of some problems that come with multithreading and concurrent programming. There is no end of a problem; if you get it wrong, they will be hard to detect and debug. This is mostly an experience-based interview question about Java.