One of the most hyped question on Singleton pattern and really demands complete understanding to get it right because of Java Memory model caveat prior to Java 5. If a guy comes up with a solution of usingvolatile keywordwith Singleton instance and explains it then it really shows it has in...
Java Memory Model defines the legal interaction of threads with the memory in a real computer system. In a way, it describes what behaviors are legal in multi-threaded code. It determines when a Thread can reliably see writes to variables made by other threads. It defines semantics for volat...
You possess sound knowledge of Java fundamentals, including knowledge includes understanding Java syntax, Java SE libraries, data structures, and the Java Memory Model.Related: 15 Java Coding Interview Questions (With Example Answers) Problem-solving capabilitiesAnother factor in the hiring decision is ...
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,...
Object-oriented programming or popularly known as OOPs is a programming model or approach where the programs are organized around objects rather than logic and functions. In other words, OOP mainly focuses on the objects that are required to be manipulated instead of logic. This approach is ideal...
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. 1. Name some important features of the Java 14 release?
–Enhanced for each loop: the for loop syntax is extended with special syntax for iterating over each member of either an array or any iterable, such as the standard collection classesfix the previously broken semantics of the java memory model, which defines how threads interact through memory...
Garbage collection is one of the most important feature of Java. Garbage collection is also called automatic memory management as JVM automatically removes the unused variables/objects (value is null) from the memory. User program cann't directly free the object from memory, instead it is the jo...
Exceptions are an essential topic that every Java developer should be familiar with. This article provides answers to some of the questions that might pop up during an interview. 2. Questions Q1. What Is an Exception? An exception is an abnormal event that occurs during the execution of a pr...
即使当前内存空间不足,JVM也不会回收它,而是抛出 OutOfMemoryError 错误,使程序异常终止。如果想中断强引用和某个对象之间的关联,可以显式地将引用赋值为null,这样一来的话,JVM在合适的时间就会回收该对象 软引用 在使用软引用时,如果内存的空间足够,软引用就能继续被使用,而不会被垃圾回收器回收,只有在内存不足...