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Viewing page 6 out of 9 pages
Viewing questions 51-60 out of questions
Questions # 51:

Which of the following statements are true about Vector and ArrayList?

Each correct answer represents a complete solution. Choose all that apply.

Options:

A.

ArrayList is synchronized and Vector is not synchronized.

B.

Each vector tries to optimize storage management by maintaining a capacity and a

capacityIncrement.

C.

If multiple threads are trying to access an ArrayList instance concurrently, and at least one of the threads modifies the list structurally, it must be synchronized externally.

D.

Vector is an implementation of the List interface and implements all optional list operations, and permits all elements, excluding null.

Questions # 52:

Which of the following methods of the HttpSession interface can be called upon an invalidated session without throwing the IllegalStateException?

Options:

A.

getAttribute()

B.

getServletContext()

C.

getAttributesNames()

D.

invalidate()

E.

getLastAccessedTime()

Questions # 53:

Which of the following statements are true about the doAs() and doAsPrivileged() methods?

Each correct answer represents a complete solution. Choose all that apply.

Options:

A.

The doAsPrivileged() method invokes AccessController.doPrivileged by passing it the provided PrivilegedAction.

B.

The doAs() and doAsPrivileged() methods perform privileged work as a particular Subject.

C.

The doAs() method retrieves the current Thread's AccessControlContext via

AccessController.getContext.

D.

The doAsPrivileged() method, instead of retrieving the current Thread's AccessControlContext, uses the provided AccessControlContext.

Questions # 54:

You work as a Web Deployer for UcTech Inc. You write the element for an application in which you write the <auth-constraint> sub-element as follows.

<auth-constraint>

*

</auth-constraint>

Who will have access to the application?

Options:

A.

No user

B.

It depends on the application.

C.

Only the administrator

D.

All users

Questions # 55:

Which of the following statements about serialization are true?

Each correct answer represents a complete solution. Choose all that apply.

Options:

A.

Transient variables cannot be serialized.

B.

Externalizable is a marker interface and does not define any method.

C.

Serializable is a marker interface and does not define any method.

D.

Static variables cannot be serialized.

Questions # 56:

Which of the following statements about the form-based authentication are true?

Each correct answer represents a complete solution. Choose two.

Options:

A.

It provides a weaker security check than the HTTP Digest and HTTPS Client authentications.

B.

It requires a hidden field that supplies the login-constraint used by the application.

C.

It requires that the action of the login form must be j_security_check.

D.

It transmits username and password over the network in the form of Base64 encoding.

Questions # 57:

The following JSP scriptlet is given.

<% response.setContentType("text/html; charset=ISO-8859-1"); %>

Which of the following directives is the equivalent directive for the scriptlet given above?

Options:

A.

<%@ include contentType="text/html; pageEncoding=ISO-8859-1" %>

B.

<%@ include contentType="text/html; charset=ISO-8859-1" %>

C.

<%@ page contentType="text/html; charset=ISO-8859-1" %>

D.

<%@ taglib contentType="text/html; pageEncoding=ISO-8859-1" %>

Questions # 58:

Which of the following roles will release a servlet instance for garbage collection after the destroy method completes?

Options:

A.

Deployer

B.

Container

C.

Provider

D.

Assembler

Questions # 59:

Which of the following statements are true?

Each correct answer represents a complete solution. Choose all that apply.

Options:

A.

An inner class cannot be defined as private.

B.

An inner class cannot be defined as protected.

C.

An inner class can be defined as private.

D.

An inner class can extend another class.

Questions # 60:

Which of the following data type values is returned by the System.in.read() console input function?

Options:

A.

String

B.

Integer

C.

Float

D.

Character

Viewing page 6 out of 9 pages
Viewing questions 51-60 out of questions
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