Answer the following: Why the first line of command is NOT recommended, and the second line of command is recommended while trying to obtain the object an Engine class? getInstance(String algorithm,...

Answer the following:

1. Why the first line of command is NOT recommended, and the second line of command is recommended while trying to obtain the object an Engine class?

                   getInstance(String algorithm, String Provider);  // not recommended

                     getInstance(String algorithm);            // recommended

1. Write a java code fragment to generate secret key