Multithreading face questions innocently forgotten? Take a look at this article it
There are T1, T2, T3 three threads, how do you ensure T2 after the implementation of execution in T1, T3 after the implementation of execution in T2?
This thread is usually the first question - asked wheel or the phone interview stage, the purpose is to detect whether you are familiar with the "join" method. This multi-threaded problem is relatively simple, it can be achieved using the join method.
What is an interface in Java Lock advantage over synchronized block? You need to implement eleven efficient caching, which allows multiple users to read, but only allows a user to write, in order to maintain its integrity, how would you go Realize it?
lock interface multithreading and concurrent programming biggest advantage is that they provide a lock to read and write, respectively, can meet you write high-performance data structures and obstruction conditional like ConcurrentHashMap. Java threads interview questions will be more and more based on answers to questions of the interviewer. I strongly recommend carefully read Locks, since it is currently a large number of customers for building the electronic trading system of the end-side caching and transaction connected space before you go to multi-threaded interview.
Different wait and sleep in java methods?
Usually often asked in a phone interview Java thread interview questions. The biggest difference is wait while waiting to release the lock, and sleep has been holding the lock. Wait typically used for inter-thread interactions, sleep is often used to pause execution.
Implemented in Java blocking queue.
This is a relatively tough interview questions multithreaded, it can achieve many purposes. First, it can detect whether a candidate who can actually write programs in Java threads; second, can detect the candidates' understanding of concurrency scenarios, and you can ask a lot of questions based on this. If he is to achieve blocking queue with a wait () and notify () method, you can ask him to use the latest Java5 in to write a concurrent class once.
Use Java to write code to solve a producer - consumer issues.
Very similar to the above problem, but the problem is more classic, there are times when the interview will ask the following questions. In Java, how to solve a producer consumer issues, of course, there are many solutions, I have to share a method with a blocking queue implementation. Sometimes they'll even ask how to achieve the Dining Philosophers problem.
Java threads illustration
- What is thread safe? Vector is a thread-safe class do?
- Java What is a race condition? An example will be described.
- What a thread exception occurs when running
- How to communicate between threads, inter-process communication How?
- Java, notify and notifyAll What is the difference?
- Why wait, notify and notifyAll these methods are not thread inside the class?
- What is ThreadLocal variable?
- Differences in Java ThreadLocal variable, volatile variables, synchronized the
- What is the Future, FutureTask?
- .....
Thread (English: Thread) is the smallest unit of an operating system capable of operation scheduling. It is included in the process, the actual operation of the unit process. A thread refers to a single control flow of a process sequence, a process can be complicated by a plurality of threads, each thread in parallel to perform different tasks. In the SunOS Unix System V and is also referred to as lightweight processes (Lightweight Processes), but more lightweight process refers to kernel threads (Kernel Thread), while the user thread (User Thread) called threads.
State of the thread
FIG queue data structure is substantially
The inner workings of ThreadPoolExecutor
- Differences in Java interrupted and isInterruptedd methods?
- Java, volatile and atomic class?
- Why not volatile atomicity?
- Why wait and notify methods to be invoked in a synchronized block?
- Synchronized set of concurrent collections in Java What is the difference
- Java heap and stack What is the difference?
- What is the thread pool? Why use it?
- Achieve producer-consumer model
- .....
More multi-threaded Java interview questions answers have been organized, there is a need can focus forwarding after private letter I [multithreading] to get free of these documents have been tidied interview!
Document 01- multi-threaded interview:
02- More Interview documentation:
03- multi-threaded and highly concurrent document
Covering thread safety, security releases, thread safe object design, mission canceled and closed, activity (deadlock, livelock, starvation), lock-free concurrency; in addition, Java concurrent with tools and thread pool, built-in lock, explicit locks lock explicit conditions like the queue condition
More multi-threaded Java interview questions answers have been organized, there is a need can focus forwarding after private letter I [multithreading] to get free of these documents have been tidied interview!
