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Oracle 1Z0-858

Java Enterprise Edition 5 Web Component(R) Developer Certified Professional

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    Oracle 1Z0-858 (Java Enterprise Edition 5 Web Component(R) Developer Certified Professional)

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1Z0-858 Questions and Answers

1Z0-858


QUESTION: 262 DRAG DROP

Click the Task button.

Place the XML elements in the web application deployment descriptor solution to configure a servlet context event listener named com.example.MyListener.


Answer:


QUESTION: 263

Which is true about the web container request processing model?


  1. The init method on a filter is called the first time a servlet mapped to that filter is invoked.

  2. A filter defined for a servlet must always forward control to the next resource in the filter chain.

  3. Filters associated with a named servlet are applied in the order they appear in the web application deployment descriptor file.


  4. If the init method on a filter throws an UnavailableException, then the container will make no further attempt to execute it.


Answer: C


QUESTION: 264

Your IT department is building a lightweight Front Controller servlet that invokes an application logic object with the interface:

public interface ApplicationController {

public String invoke(HttpServletRequest request)

}

The return value of this method indicates a symbolic name of the next view. From this name, the Front Controller servlet looks up the JSP URL in a configuration table. This URL might be an absolute path or a path relative to the current request. Next, the Front Controller servlet must send the request to this JSP to generate the view. Assume that the servlet variable request is assigned the current HttpServletRequest object and the variable context is assigned the webapp's ServletContext. Which code snippet of the Front Controller servlet accomplishes this goal?


  1. Dispatcher view

    = context.getDispatcher(viewURL); view.forwardRequest(request, response);

  2. Dispatcher view

    = request.getDispatcher(viewURL); view.forwardRequest(request, response);

  3. RequestDispatcher view

    = context.getRequestDispatcher(viewURL); view.forward(request, response);

  4. RequestDispatcher view

= request.getRequestDispatcher(viewURL); view.forward(request, response);


Answer: D


QUESTION: 265

Given that a web application consists of two HttpServlet classes, ServletA and ServletB, and the ServletA.service method:

  1. String key = "com.example.data";

  2. session.setAttribute(key, "Hello");

  3. 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.)


  1. ensure that the ServletB.service method is synchronized

  2. ensure that the ServletA.service method is synchronized

  3. ensure that ServletB synchronizes on the session object when setting session attributes

  4. enclose lines 21-22 in a synchronized block:

    synchronized(this) { session.setAttribute(key, "Hello"); value = session.getAttribute(key);

    }

  5. enclose lines 21-22 in a synchronized block: synchronized(session) { session.setAttribute(key, "Hello");

value = session.getAttribute(key);

}


Answer: C, E


QUESTION: 266

Which retrieves all cookies sent in a given HttpServletRequest request?


  1. request.getCookies()

  2. request.getAttributes()

  3. request.getSession().getCookies()

  4. request.getSession().getAttributes()


Answer: A


QUESTION: 267

Your company has a corporate policy that prohibits storing a customer's credit card number in any corporate database. However, users have complained that they do NOT want to re-enter their credit card number for each transaction. Your management has decided to use client-side cookies to record the user's credit card number for 120 days. Furthermore, they also want to protect this information during transit from the web browser to the web container; so the cookie must only be transmitted over HTTPS. Which code snippet creates the "creditCard" cookie and adds it to the out going response to be stored on the user's web browser?


  1. 10. Cookie c = new Cookie("creditCard", usersCard);


    11. c.setSecure(true);

    12. c.setAge(10368000);

    13. response.addCookie(c);

  2. 10. Cookie c = new Cookie("creditCard", usersCard);

    1. c.setHttps(true);

    2. c.setMaxAge(10368000);

    3. response.setCookie(c);

  3. 10. Cookie c = new Cookie("creditCard", usersCard);

    1. c.setSecure(true);

    2. c.setMaxAge(10368000);

    3. response.addCookie(c);

  4. 10. Cookie c = new Cookie("creditCard", usersCard);

    11. c.setHttps(true);

    12. c.setAge(10368000);

    13. response.addCookie(c);

  5. 10. Cookie c = new Cookie("creditCard", usersCard);

11. c.setSecure(true);

12. c.setAge(10368000);

13. response.setCookie(c);


Answer: C


QUESTION: 268 DRAG DROP

Click the Task button.

Given a servlet mapped to /control, place the correct URI segment returned as a String on the corresponding HttpServletRequest method call for the URI:

/myapp/control/processorder.


Answer:


QUESTION: 269

A web browser need NOT always perform a complete request for a particular page that it suspects might NOT have changed. The HTTP specification provides a mechanism for the browser to retrieve only a partial response from the web server; this response includes information, such as the Last-Modified date but NOT the body of the page. Which HTTP method will the browser use to retrieve such a partial response?


  1. GET

  2. ASK


  3. SEND

  4. HEAD

  5. TRACE

  6. OPTIONS


Answer: D


QUESTION: 270

You are creating a servlet that generates stock market graphs. You want to provide the web browser with precise information about the amount of data being sent in the response stream. Which two HttpServletResponse methods will you use to provide this information? (Choose two.)


  1. response.setLength(numberOfBytes);

  2. response.setContentLength(numberOfBytes);

  3. response.setHeader("Length", numberOfBytes);

  4. response.setIntHeader("Length", numberOfBytes);

  5. response.setHeader("Content-Length", numberOfBytes);

  6. response.setIntHeader("Content-Length", numberOfBytes);


Answer: B, F


QUESTION: 271

Which two prevent a servlet from handling requests? (Choose two.)


  1. The servlet's init method returns a non-zero status.

  2. The servlet's init method throws a ServletException.

  3. The servlet's init method sets the ServletResponse's content length to 0.

  4. The servlet's init method sets the ServletResponse's content type to null.

  5. The servlet's init method does NOT return within a time period defined by the servlet container.


Answer: B, E


QUESTION: 272

A web application allows the HTML title banner to be set using a servlet context initialization parameter called titleStr. Which two properly set the title in this scenario? (Choose two.)


  1. <title>${titleStr}</title>

  2. <title>${initParam.titleStr}</title>

  3. <title>${params[0].titleStr}</title>

  4. <title>${paramValues.titleStr}</title>

  5. <title>${initParam['titleStr']}</title>

  6. <title>${servletParams.titleStr}</title>

  7. <title>${request.get("titleStr")}</title>


Answer: B, E


QUESTION: 273

You are building a dating service web site. Part of the form to submit a client's profile is a group of radio buttons for the person's hobbies:

  1. <input type='radio' name='hobbyEnum' value='HIKING'>Hiking <br>

  2. <input type='radio' name='hobbyEnum' value='SKIING'>Skiing <br>

  3. <input type='radio' name='hobbyEnum' value='SCUBA'>SCUBA Diving

  4. <!-- and more options -->

After the user submits this form, a confirmation screen is displayed with these hobbies listed. Assume that an application-scoped variable, hobbies, holds a map between the Hobby enumerated type and the display name. Which EL code snippet will display Nth element of the user's selected hobbies?


  1. ${hobbies[hobbyEnum[N]}

  2. ${hobbies[paramValues.hobbyEnum[N]]}

  3. ${hobbies[paramValues@'hobbyEnum'@N]}

  4. ${hobbies.get(paramValues.hobbyEnum[N])}

  5. ${hobbies[paramValues.hobbyEnum.get(N)]}


Answer: B


QUSTION: 274

Given a web application in which the request parameter productID contains a product identifier. Which two EL expressions evaluate the value of the productID? (Choose two.)


  1. ${productID}

  2. ${param.productID}

  3. ${params.productID}

  4. ${params.productID[1]}

  5. ${paramValues.productID}


  6. ${paramValues.productID[0]}

  7. ${pageContext.request.productID}


Answer: B, F


QUESTION: 275

You are building a web application with a scheduling component. On the JSP, you need to show the current date, the date of the previous week, and the date of the next week. To help you present this information, you have created the following EL functions in the 'd' namespace:

name: curDate; signature: java.util.Date currentDate()

name: addWeek; signature: java.util.Date addWeek(java.util.Date, int) name: dateString; signature: java.util.String getDateString(java.util.Date) Which EL code snippet will generate the string for the previous week?


  1. ${d:dateString(addWeek(curDate(), -1))}

  2. ${d:dateString[addWeek[curDate[], -1]]}

  3. ${d:dateString[d:addWeek[d:curDate[], -1]]}

  4. ${d:dateString(d:addWeek(d:curDate(), -1))}


Answer: D


QUESTION: 276

You are building a dating web site. The client's date of birth is collected along with lots of other information. The Person class has a derived method, getAge():int, which returns the person's age calculated from the date of birth and today's date. In one of your JSPs you need to print a special message to clients within the age group of 25 through 35. Which two EL code snippets will return true for this condition? (Choose two.)


  1. ${client.age in [25,35]}

  2. ${client.age between [25,35]}

  3. ${client.age between 25 and 35}

  4. ${client.age <= 35 && client.age >= 25}

  5. ${client.age le 35 and client.age ge 25}

  6. ${not client.age > 35 && client.age < 25}


Answer: D, E

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