This question has been asked and answered in many posts recently. Please browse through some recent posts and you shall get all clarification. you can use the book, there are not much differences.
Very little changes in the SCWCD 5.0 exam. They have removed two objectives from the SCWCD 5.0 exam :
*Given a scenario, write EL code that uses the following operators: aritmetic operators, relational operators, and logical operators. * Given a scenario, write EL code that uses a function; write code for an EL function; and configure the EL function in a tag library descriptor.