What is the difference between null and undefined?

501

How do I create a tag?

93

Is spring a singleton component?

147

What is umask in linux?

529

What is the Purpose of the MQTT protocol?

5

What are the three js files that you require to setup a working environment for backbone?

5

can external ldap directory be used in domino ?

5

Is filemaker pro a relational database?

548

Explain the various message exchange patterns?

444

I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

1528

What is the difference IN MCCB's between thermal magnetic and electronic tripping system ?

1542

What are autotrophic beings?

112

Why don't you make your future with this hobby?

682

Can unique keys be null?

484

Explain what are the advantages of asp.net mvc framework? : asp.net mvc

515