Which of the following is used to protect important data?
时间: 2024-05-26 16:12:52 浏览: 14
There are many ways to protect important data, including encryption, access control, backups, firewalls, and physical security measures. The specific method used will depend on the nature of the data, the threats it faces, and the resources available.
相关问题
What is the name of the method used to start thread execution?
The `start()` method is used to start the execution of a thread in Java. When this method is called on a `Thread` object, it creates a new thread and calls the `run()` method on it, which starts the execution of the thread.
Which of the following statements is preferred to create a string "Welcome to Java"?
The most preferred way to create a string "Welcome to Java" is:
```
String str = "Welcome to Java";
```
This creates a string literal and assigns it to the variable `str`. String literals are preferred over creating strings using the `new` operator because they are more efficient and use less memory. When a string literal is encountered, the Java compiler creates a single instance of the string in the string pool and all references to the same string literal point to this instance.
Therefore, using a string literal is the most preferred way to create a string in Java.