This week's book giveaway is in the Cloud/Virtualization forum. We're giving away four copies of Learning OpenStack Networking: Build a solid foundation in virtual networking technologies for OpenStack-based clouds and have James Denton on-line! See this thread for details.
Hi, The Reader entity has 2 entries whereas the book entity has 4 entries. we want a collection thats less than 4 . option A will give all the readers from the book entity thats 4 entries option B will give all the reader entities joined to the book entity thats also 4 . option C will give all the readers from the reader entity thjat have books . the result set is a collection of 2 hence this is the correct answer.