felülírásra

Felülírásra is a Hungarian term that translates to "overwrite" in English. It is commonly used in computing and digital contexts to describe the process of replacing existing data with new data. When a file or a block of memory is overwritten, the original content is permanently lost and is replaced by the new information.

This concept is fundamental to many operations. For example, when saving a document with the same filename, the new version overwrites the old one. Similarly, in data storage, when sectors on a hard drive or SSD are reused, they are overwritten with new data. In programming, variables can be overwritten when a new value is assigned to them, replacing the previous value held in memory.

The act of overwriting is often unintentional, such as accidentally saving over an important file. However, it can also be a deliberate action, used for security purposes like securely deleting sensitive data by overwriting it multiple times with random patterns, making it extremely difficult to recover. In some performance-critical applications, overwriting data in memory might be a technique to avoid memory allocation and deallocation overhead. Understanding the implications of overwriting is crucial for data management and digital security.