Quantum Computing – The Next Tech Revolution Technology has evolved rapidly over the last few decades—from bulky mainframe computers to powerful smartphones in our pockets. Yet, despite these advances, traditional computers are approaching their physical limits. This is where quantum computing enters the scene, promising to revolutionize the way we process information and solve complex problems. What Is Quantum Computing? Quantum computing is a new paradigm of computing that uses the principles of quantum mechanics, a branch of physics that explains how matter and energy behave at the smallest scales. Unlike classical computers, which use bits that represent either 0 or 1, quantum computers use qubits. Qubits can exist in multiple states simultaneously, thanks to a property called superposition. Additionally, qubits can be interconnected through entanglement, allowing them to share information instantaneously. These unique properties give quantum computers immense computational power....
What are the ways to initialize a final variable ?
We must initialize a final variable, otherwise compiler will throw compile time error. A final variable can only be initialize once, either via an initializer or an assignment statement. There are three ways to initialize a final variable,
1) You can initialize a final variable when it is declared. This approach is most common. A final variable is called blank final variable, if it is not initialized while declaration. Below are the two ways to initialize a blank final variable.
2) A blank final variable can be initialized inside constructor. If you have more than one constructor in your class then it must be initialized in all of them, otherwise compile time error will be thrown.
3) A blank final static variable can be initialized inside static block.
What is the difference between transient and volatile variable in Java ?
Transient:
In Java, it is used to specify the variable is not being serialized. Serialization is the process of saving an object's state in Java. When we want to persist the object's state by default, all instance variables in the object are stored. In some cases, if we want to avoid persisting few variables, declare those variables as transient. If the variable is confirmed as transient, then it will not be persisted. Transient keyword is used with that instance variable which will not participate in the serialization process.
Volatile :
Volatile modifier tells the compiler that the variable modified by volatile can be changed expectedly by other parts of the program, so writes to the field should always be synchronously flushed to memory, and that reads of the field should always read from memory. Any threads using that variable are not allowed to cache that value at all. This means that fields marked as volatile can be safely acrossed and updated in a multithread application without using native or standard library-based synchronization.