All three major platforms dicussed in the book have a marketplace for developers to sell their apps.

Java is considered a strongly typed language because:C

a. The primitive types in Java are portable across all computer platforms that support Java. b. Java requires all variables to have a type before they can be used in a program. c. Instance variables of the primitive types are automatically assigned a default value. d. All of the above.

Describe the two-phase commit protocol when one or more of the database managers is using an optimistic concurrency control.

What will be an ideal response?