ABB Placement Paper - Reasoning and J2EE Questions

Reasoning Questions

1. If in a certain language, ENTRY is coded as 12345 and STEADY is coded as 931785, then state the correct code for TENANT:
   

   (a) 956169

   (b) 196247

   (c) 352123

   (d) 312723 (Ans)

2. If SEDATE is coded similarly:
   

   (a) 918731 (Ans)

   (b) 954185

   (c) 814195

   (d) 614781

3. The code for NEATNESS is:
   

   (a) 25196577

   (b) 21732199 (Ans)

   (c) 21362199

   (d) 21823698

4. The code for ARREST is:
   

   (a) 744589

   (b) 744193 (Ans)

   (c) 166479

   (d) 745194

5. ENDEAR is coded as:
   

   (a) 524519

   (b) 174189

   (c) 128174 (Ans)

   (d) 124179

J2EE Questions

1. What exception is thrown when Servlet initialization fails?
   

   (a) IOException

   (b) ServletException (Ans)

   (c) RemoteException

2. How can a Servlet call a JSP error page?
   

   (a) This capability is not supported.

   (b) When the servlet throws the exception, it will automatically be caught by the calling JSP page.

   (c) The servlet needs to forward the request to the specific error page URL. The exception is passed along as an attribute named "javax.servlet.jsp.jspException". (Ans)

   (d) The servlet needs to redirect the response to the specific error page, saving the exception off in a cookie.

3. What is the key difference between using a `` and HttpServletResponse.sendRedirect()?
   

   (a) forward executes on the client while sendRedirect() executes on the server.

   (b) forward executes on the server while sendRedirect() executes on the client. (Ans)

   (c) The two methods perform identically.

4. Why are beans used in J2EE architecture instead of writing all the code in JSPs?
   

   (a) Allows separation of roles between web developers and application developers (Ans)

   (b) Allows integration with Content Management tools

5. Why are DB connections not written directly in JSPs?
   

   (a) Response is slow

   (b) Not a standard J2EE architecture

   (c) Load Balancing is not possible

   (d) All the above

   (e) Both (b) and (c) (Ans)

6. How are multiple EJB instances managed?
   

   (a) Connection Pooling

   (b) Caching of EJB instances

   (c) EJB Passivation

   (d) All the above (Ans)

7. In JSP, how can you determine what HTTP method (GET or POST) was used by the client request?
   

   (a) by using request.getMethod() (Ans)

   (b) by using request.setMethod()

   (c) Impossible to know

8. Which method is called first each time a Servlet is invoked?
   

   (a) Start()

   (b) Run()

   (c) Service()

   (d) Init() (Ans)

9. Which of the following is true?
   

   (a) Unlimited data transfer can be done using POST method (Ans)

   (b) Data is visible in Browser URL when using POST method

   (c) When large amounts of data transfer is to be done, GET method is used