In This post we will talk about What are the key difference between unit, integration and functional testing? A unit tests a small isolated piece of code such as a method. It doesn’t interact with any other systems such as a database or another application. An integration test tests how your code plays with other systems,… Read More »
In This post we will talk about Difference between List and Set in Java Collection and When to use Set and When to use List Collection? Both List and Set hold collection of Objects but there are some differences List allows duplicates while Set doesn’t allow duplicate elements. All the elements of a Set must be unique… Read More »
In this blog post we will discuss about one of the very important java interview question How can we maintain Immutability of a class with a mutable reference ? To create an immutable class, you must follow the below steps? Make your class final, so that no other classes can extend it. Make all instance variables private & final, so… Read More »
In this blog post we will discuss about one of the very important java interview question When we choose LongAdder and LongAccumulator over AtomicLong & AtomicInteger ? In case of when you have a very large amount of threads accessing the same atomic variable, performance suffers because the optimistic updates require too many retries. Java 8 came… Read More »
In this blog post we will discuss about one of the very important java interview question What is difference between intrinsic synchronization and explicit locking using Lock? Intrinsic synchronization Explicit Locking using Lock and Condition It is not possible to interrupt a thread waiting to acquire a lock, or attempt to acquire a lock without being… Read More »
In this blog post we will discuss about one of the very important java interview question What is difference between Executor submit() and execute() method? There is a difference the way both methods handle Exception. If your tasks throws an exception and if it was submitted with execute(Runnable) this exception will go to the uncaught exception… Read More »
In this blog post we will discuss about one of the very important java interview question What will happen when an exception arises from within a synchronized code block? Will lock be retained or released? When an exception occurs from within a synchronized code block, then JVM smartly releases all the locks acquired by the current… Read More »
In this blog post we will discuss about one of the very important java interview question What is fail fast and fail-safe iterator in java? Fail-Fast Iterator Iterator fails as soon as it realizes that the structure of the underlying data structure has been modified since the iteration has begun. Structural changes mean adding, removing any… Read More »
In this blog post we will discuss about one of the very important java interview question Describe CopyOnWriteArrayList? Where is it used in Java Applications? We will look into some practical examples so that below points would me clear to you about CopyOnWriteArrayList. Functionality wise this collection is very much similar to ArrayList except the fact that… Read More »
In this blog post we will discuss about one of the very important java interview question What is difference between Callable and Runnable Interface? The java.util.concurrent.Callable interface is similar to java.lang.Runnable to create a custom threads and both are designed for classes whose instances are potentially executed by another thread. A Runnable, however, does not return… Read More »