bkt1
01-06-2009, 03:15
Hi, tớ đang phải ôn thi môn Component-based software, trong đó có 1 số phần về EJB mà tớ thì mù tịt về khoản này. Bạn nào biết có thể trả lời giúp tớ thì tốt. Thanks in advance
1. Enterprise JavaBeans (EJB) allows for separation of business logic from some middleware services. Give two examples of such middleware services and describe how Enterprise JavaBeans handles them
2. For each Enterprise JavaBean (EJB), the developer must pecify which kind of bean it is.
a. What are the 3 different kinds of Enterprise JavaBeans?
b. Why does the EJB system need to distinguish between different kinds of beans?
Give 2 examples of what the information can be used for?
3. Compared to EJB 2.0, EJB 3.0 involves several simplifications. What is the key difference with respect to object orientation?
Câu 1 mình đã trả lời rồi nhưng hỏi lại cho chắc, câu số 2 là câu mình cần nhất.
Thanks các bạn.
1. Enterprise JavaBeans (EJB) allows for separation of business logic from some middleware services. Give two examples of such middleware services and describe how Enterprise JavaBeans handles them
2. For each Enterprise JavaBean (EJB), the developer must pecify which kind of bean it is.
a. What are the 3 different kinds of Enterprise JavaBeans?
b. Why does the EJB system need to distinguish between different kinds of beans?
Give 2 examples of what the information can be used for?
3. Compared to EJB 2.0, EJB 3.0 involves several simplifications. What is the key difference with respect to object orientation?
Câu 1 mình đã trả lời rồi nhưng hỏi lại cho chắc, câu số 2 là câu mình cần nhất.
Thanks các bạn.