Online Access Free 1Z0-858 Practice Test

You are building a Front Controller using a JSP page and you need to determine if the user's session has NOT been created yet and perform some special processing for this case. Which scriptlet code snippet will perform this test?

• A.<% if ( requestObject.getHttpSession(false) == null ) {
  // special processing
  } %>
• B.<% if ( request.getHttpSession(false) == null ) {
  // special processing
  } %>
• C.<% if ( request.getSession(false) == null ) {
  // special processing
  } %>
• D.<% if ( requestObject.getSession(false) == null ) {
  // special processing
  } %>

You need to store a Java long primitive attribute, called customerOID, into the session scope. Which two code snippets allow you to insert this value into the session? (Choose two.)

• A.long customerOID = 47L; session.setNumericAttribute("customerOID", new Long(customerOID));
• B.long customerOID = 47L; session.setLongAttribute("customerOID", customerOID);
• C.long customerOID = 47L; session.setNumericAttribute("customerOID", customerOID);
• D.long customerOID = 47L; session.setLongAttribute("customerOID", new Long(customerOID));
• E.long customerOID = 47L; session.setAttribute("customerOID", customerOID);
• F.long customerOID = 47L; session.setAttribute("customerOID", new Long(customerOID));

Given that a web application consists of two HttpServlet classes, ServletA and ServletB, and the ServletA.service method:
20.
String key = "com.example.data";
21.
session.setAttribute(key, "Hello");
22.
Object value = session.getAttribute(key);
23.
Assume session is an HttpSession, and is not referenced anywhere else in ServletA.
Which two changes, taken together, ensure that value is equal to "Hello" on line 23? (Choose two.)

• A.enclose lines 21-22 in a synchronized block:
  synchronized(this) {
  session.setAttribute(key, "Hello");
  value = session.getAttribute(key);
  }
• B.ensure that the ServletA.service method is synchronized
• C.ensure that the ServletB.service method is synchronized
• D.ensure that ServletB synchronizes on the session object when setting session attributes
• E.enclose lines 21-22 in a synchronized block:
  synchronized(session) {
  session.setAttribute(key, "Hello");
  value = session.getAttribute(key);
  }

Given the JSP code:
10.<html>
11.<body>
12.<jsp:useBean id='customer' class='com.example.Customer' />
13.Hello, ${customer.title} ${customer.lastName}, welcome
14.to Squeaky Beans, Inc.
15.</body>
16.</html>
Which three types of JSP code are used? (Choose three.)

• A.standard action
• B.scripting code
• C.Java code
• D.expression language
• E.template text

Given:
1.<% int[] nums = {42,420,4200};
2.request.setAttribute("foo", nums); %>
3.${5 + 3 lt 6}
4.${requestScope['foo'][0] ne 10 div 0}
5.${10 div 0}
What is the result?

• A.false true
• B.false true 0
• C.false true Infinity
• D.Compilation or translation fails.
• E.true true
• F.true true Infinity
• G.An exception is thrown.