1const user = { name: 'Alice', age: 25 };  
2
3Object.freeze(user);  
4// user.name = 'Bob'; // Uncomment to test  
5// delete user.age; // Uncomment to test  
6
7const settings = { theme: 'dark', notifications: true };  
8
9Object.seal(settings);  
10settings.theme = 'light';  
11// delete settings.notifications; // Uncomment to test  
12
13console.log(user);  
14console.log(settings);