Is it possible to implement two interfaces containing the same method declarations in one class?

Yes, in Java, it is possible to implement two interfaces in a single class that contain the same method declarations. Since interfaces only contain method signatures (without implementation), a class implementing both interfaces must provide a single implementation for these methods.

Example:

interface InterfaceA {
    void doSomething();
}

interface InterfaceB {
    void doSomething();
}

public class MyClass implements InterfaceA, InterfaceB {
    @Override
    public void doSomething() {
        System.out.println("Implementation of doSomething method");
    }
}

Thus, no conflicts arise, and the class implements the method only once for both interfaces.