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The @Transactional annotation in Spring indicates that a method or class should be executed within a transactional context. It manages the transaction boundaries for a method or class, ensuring that all operations within it are either committed or rolled back as a unit. This annotation is useful ...
可见性 Java提供了volatile关键字来保证可见性。 当一个共享变量被volatile修饰时,它会保证修改的值会立即被更新到主存,当有其他线程需要读取时,它会去内存中读取新值。 而普通的共享变量不能保证可见性,因为普通共享变量被修改之后,什么时候被写入主存是不确定的,当其他线程去读取时,此时内存中可能还是原来的旧值,...
Java Thread Interview Questions Java Collections Interview Questions Java Exception Interview Questions Here I am providing some of the important core java interview questions with answers that you should know. You can bookmark this post to brush up on your knowledge before heading for an interview. ...
https://stackoverflow.com/questions/2846165/why-does-an-infinite-loop-of-the-unintended-kind-increase-the-cpu-use 2、频繁的Young GC会导致CPU占用率飙升吗? 是。 Young GC本身就是JVM用于垃圾收集的操作,它需要计算内存和调用寄存器。因此,频繁的Young GC必须占用CPU资源。
Tutorial #148:Java Project Ideas For Beginners [New LIST] Java Interview Questions: Tutorial #149:Core Java Interview Questions Tutorial #150:J2EE Interview Questions Tutorial #151:Top 40 Java 8 Interview Questions & Answers Tutorial #152:30+ Top Java Collections Interview Questions With Answers ...
11. Can you write critical section code for singleton? This core Java question is followup of previous question and expecting candidate to write Java singleton using double checked locking. Remember to use volatile variable to make Singleton thread-safe. check 10 Interview questions on Singleton Pat...
focus on including the most important features like whether there needs to be data storage, how to send notifications and how to manage users when they are offline and online. Be sure to talk through your design process so the hiring manager can answer questions and give feedback along the ...
Preparing for Java Interview is tricky. You would need to get a good understanding of new features and revise concepts you used in your preparation. This course helps you Prepare for Java Interview with hands-on code examples covering 200+ Java Interview Questions and Answers on varied range of...
I tend to see some merit in using such questions, but, as often, personal opinions are irrelevant. So instead of starting a debate about this particular question or similar questionable practices, I will focus on the purpose and the practical approaches we apply when conducting interviews. I ...