Quiznetik

Enterprise Computing With JAVA | Set 1

1. The __________tier processes HTTP protocol, scripting tasks, performs calculations, and provides access to data.

A. Client

B. Applications/Web server

C. Enterprise server

D. DBA

Correct : A. Client

2. _________ are used to identify a user who returns to a Website.

A. Cookies

B. Plug-ins

C. Scripts

D. ASPs

Correct : A. Cookies

3. Which one of the following objects is passed to a Java Bean when one of its properties is set via a JSP action?

A. Servlet Request

B. Http Servlet Request

C. Servlet Response

D. Http Servlet Response

Correct : C. Servlet Response

4. Struts framework is based on

A. Servlet.JSP and Java

B. Servlet,.HTML and Java

C. Servlet JSP, XML and Java

D. Applet, XML and Java

Correct : A. Servlet.JSP and Java

5. Action Servlet, Request Processor and Action classes are the components of

A. View

B. Model

C. Deployment

D. Controller

Correct : B. Model

6. Which of the following delegates the request handling to the Request Processor instance?

A. Action Servlet

B. Action class

C. Deployment descriptor

D. None of the above

Correct : B. Action class

7. How many instances can be created per application module by the Request Processor class?

A. Four

B. Three

C. One

D. Uncountable instances

Correct : C. One

8. An instance of Action is invoked by

A. ActionServlet

B. ActionListener

C. RequestProcessor

D. All of above

Correct : A. ActionServlet

9. What declarations are required for every Java application?

A. A class and the main( ) method declarations.

B. A class with void method

C. A class with main method

D. A class with init method

Correct : A. A class and the main( ) method declarations.

10. What is a compilation unit?

A. Java Byte code

B. Java source code file

C. Source code

D. Java Exe

Correct : B. Java source code file

11. In order for a source code file, containing the public class Test, to successfully compile, which of the following must be true?

A. It must have a package statement

B. It must be named Test.java

C. It must import java.lang

D. It must declare a public class named Test

Correct : B. It must be named Test.java

12. What are identifiers and what is naming convention?

A. Identifiers are used for class names

B. Identifiers are used for class names, method names

C. Identifiers are used for class names, method names and variable names.

D. None of above

Correct : C. Identifiers are used for class names, method names and variable names.

13. What is the return type of program’s main( ) method?

A. Void main()

B. Init

C. Void

D. Run

Correct : C. Void

14. What is the value of a[3] as the result of the following array declaration?

A. 1

B. 2

C. 3

D. 4

Correct : D. 4

15. Which of the following are primitive types?

A. byte

B. String

C. integer

D. Float

Correct : A. byte

16. What is the range of the char type?

A. 0 to 216

B. 0 to 215

C. 0 to 216-1

D. 0 to 215-1

Correct : D. 0 to 215-1

17. What are primitive data types?

A. byte, short, int, long

B. float, double

C. boolean

D. char

Correct : A. byte, short, int, long

18. What are default values of different primitive types?

A. int - 0

B. short - 0

C. byte - 0

D. long - 0 l

Correct : A. int - 0

19. How do we change the values of the elements of the array?

A. The array expression

B. The array subscript expression can be used to change the values of the elements of the array.

C. The definition of element

D. The definition & declaration of element array

Correct : B. The array subscript expression can be used to change the values of the elements of the array.

20. Which of the following features are common to both Java & C++?

A. The class declaration

B. The access modifiers

C. The encapsulation of data & methods with in objects

D. All of above

Correct : D. All of above

21. Which of the following statements accurately describe the use of access modifiers within a class definition?

A. They can be applied to both data & methods

B. They must precede a class's data variables or methods

C. They can appear in any order

D. All of above

Correct : D. All of above

22. Which of the following statements can be used to describe a public method?

A. It is accessible to all other classes in the hierarchy

B. It represents the public interface of its class

C. All of above

D. None of these

Correct : C. All of above

23. Which of the following statements correctly describes the relation between an object and the instance variable it stores?

A. Each new object has its own distinctive set of instance variables

B. Each object has a copy of the instance variables of its class

C. The instance variable of each object are separate from the variables of other objects

D. All of above

Correct : D. All of above

24. What are the functions of the dot(.) operator?

A. It enables you to access instance variables of any objects within a class

B. It enables you to store values in instance variables of an object

C. It is used to call object methods

D. All of above

Correct : D. All of above

25. When may a constructor be called without specifying arguments?

A. When the default constructor is not called

B. When the name of the constructor differs from that of the class

C. When there are no constructors for the class

D. None of above

Correct : C. When there are no constructors for the class

26. When might your program wish to run the garbage collecter?

A. Before it enters a compute-intense section of code

B. Before it enters a memory-intense section of code

C. When it knows there will be some idle time

D. All of above

Correct : D. All of above

27. Which method is used to specify before any lines that uses the PrintWriter?

A. setPageType()

B. setContextType()

C. setContentType()

D. setResponseType()

Correct : C. setContentType()

28. Servlet mapping defines

A. an association between a URL pattern and a servlet

B. an association between a URL pattern and a request page

C. an association between a URL pattern and a response page

D. All of the above

Correct : A. an association between a URL pattern and a servlet

29. The getSession() method with ‘true’ as its parameter [ getSession(true)] it will return the appropriate session object when

A. the session is completed

B. the session object is passed to another method

C. the session does not exists

D. the session is existing

Correct : D. the session is existing

30. Dynamic interception of requests and responses to transform the information is done by

A. servlet container

B. servlet config

C. servlet context

D. servlet filter

Correct : D. servlet filter

31. The method forward (request,response) will

A. return back to the same method from where the forward was invoked

B. not return back to the same method from where the forward was invoked and the web pages navigation continues

C. Both A and B are correct

D. None of the above

Correct : A. return back to the same method from where the forward was invoked

32. What's the difference between servlets and applets? 1. Servlets executes on Servers, where as Applets executes on Browser 2. Servlets have no GUI, where as an Applet has GUI 3. Servlets creates static web pages, where as Applets creates dynamic web pages 4. Servlets can handle only a single request, where as Applet can handle multiple requests

A. 1,2,3 are correct

B. 1,2 are correct

C. 1,3 are correct

D. 1,2,3,4 are correct

Correct : B. 1,2 are correct

33. Which of the following are the session tracking techniques?

A. URL rewriting, using session object, using response object, using hidden fields

B. URL rewriting, using session object, using cookies, using hidden fields

C. URL rewriting, using servlet object, using response object, using cookies

D. URL rewriting, using request object, using response object, using session object

Correct : B. URL rewriting, using session object, using cookies, using hidden fields

34. The getSession() method with ‘true’ as its parameter [ getSession(true) ] it will return the appropriate session object when

A. the session is completed

B. the session object is passed to another method

C. the session does not exists

D. the session is existing

Correct : D. the session is existing

35. RequestDispatcher object is used

A. to include other resources

B. to include an image

C. to include xml object

D. to include e-mailing response

Correct : A. to include other resources

36. The include() method of RequestDispatcher

A. sends a request to another resource like servlet, jsp or html

B. includes resource of file like servlet, jsp or html

C. appends the request and response objects to the current servlet

D. None of the above

Correct : B. includes resource of file like servlet, jsp or html

37. To get the servlet environment information

A. ServletConfig object is used

B. ServletException object is used

C. ServletContext object is used

D. ServletContainer object is used

Correct : C. ServletContext object is used

38. The values of <servlet-name> and <servlet-class> in web.xml file

A. must be same

B. must not be same

C. may be same

D. None of the above

Correct : C. may be same

39. What is the limit of data to be passed from HTML when doGet() method is used?

A. 4K

B. 8K

C. 2K

D. 1K

Correct : C. 2K

40. In which advantage of servlet, Servlets are managed by JVM so no need to worry about memory leak, garbage collection etc.?

A. Better performance

B. Portability

C. Robust

D. Secure

Correct : C. Robust

41. In the following statements identify the disadvantages of CGI?

A. If number of clients increases, it takes more time for sending response

B. For each request, it starts a process and Web server is limited to start processes

C. It uses platform dependent language e.g. C, C++, perl

D. All mentioned above

Correct : D. All mentioned above

42. Servlet technology is used to create web application?

A. True

B. False

C. all

D. none

Correct : A. True

43. In HTTP Request Which Asks for the loopback of the request message, for testing or troubleshooting?

A. PUT

B. OPTIONS

C. DELETE

D. TRACE

Correct : D. TRACE

44. In HTTP Request method Get request is secured because data is exposed in URL bar?

A. True

B. False

C. all

D. none

Correct : B. False

45. In the HTTP Request method which is non-idempotent?

A. GET

B. POST

C. BOTH A & B

D. None of the above

Correct : B. POST

46. Give the examples of Application Server from the following?

A. Apache

B. JBoss

C. Weblogic

D. Both B & C

Correct : D. Both B & C

47. Abbreviate the term MIME?

A. Multilevel internet Mail Extension

B. Multipurpose internet Mail Extension

C. Multiuse information Mail Extension

D. None of the above

Correct : B. Multipurpose internet Mail Extension

48. Which packages represent interfaces and classes for servlet API?

A. javax.servlet

B. javax.servlet.http

C. Both A & B

D. None of the above

Correct : C. Both A & B

49. The web container maintains the life cycle of a servlet instance,give the lifecycle of a servlet?

A. Servlet class is loaded

B. Servlet instance is created

C. init,Service,destroy method is invoked

D. All mentioned above

Correct : D. All mentioned above

50. What are the contents of web module?

A. JSP files

B. Java classes

C. Gif and Html files and

D. Web component deployment descriptors

Correct : A. JSP files

51. Which of the following are examples of JSP directive? Select the two correct answers.

A. include

B. exclude

C. import

D. taglibrary

Correct : A. include

52. A JSP page uses the java.util.ArrayList class many times. Instead of referring the class by its complete package name each time, we want to just use ArrayList. Which attribute of page directive must be specified to achieve this? Select the one correct answer.

A. extends

B. import

C. include

D. package

Correct : B. import

53. A JSP page needs to generate an XML file. Which attribute of page directive may be used to specify that the JSP page is generating an XML file?

A. contentType

B. generateXML

C. type

D. outputXML

Correct : A. contentType

54. JSP pages have access to implicit objects that are exposed automatically. Name the implicit object that is of type HttpSession.

A. session

B. application

C. httpSession

D. httpsession

Correct : A. session

55. JSP pages have access to implicit objects that are exposed automatically. One such object that is available is request. The request object is an instance of which class?

A. HttpRequest

B. ServletRequest

C. Request

D. HttpServletRequest

Correct : D. HttpServletRequest

56. What is the limitation of creating ActionServlet instances per web application?

A. Two

B. Three

C. Unlimited

D. One

Correct : A. Two

57. ActionServlet, RequestProcessor and Action classes are the components of

A. View

B. Model

C. Deployment

D. Controller

Correct : D. Controller

58. Which of the java bean tags is used to show the bean value on the web page?

A. < bean:define>

B. < bean:message>

C. < bean:show>

D. < bean:write>

Correct : D. < bean:write>

59. Which of the following are server side programming languages? 1.HTML 2.JavaScript 3.JSP 4.Sevlets

A. 1,2,3,4

B. 1,2

C. 3,4

D. None

Correct : C. 3,4

60. What JSP is basically used today?

A. To make controller

B. To make GUI

C. In writing business logic

D. Deprecated

Correct : B. To make GUI

61. What is the purpose of <noscript> tag in Java Script?

A. Prevents scripts on the page from executing.

B. Enclose text to be displayed by non –JavaScript browsers.

C. Suppresses the result to be displayed on the web page.

D. None of the above.

Correct : B. Enclose text to be displayed by non –JavaScript browsers.

62. Java Script entities start with _and end with ___

A. Semicolon, colon

B. Semicolon, Ampersand

C. Ampersand, colon

D. Ampersand, semicolon.

Correct : D. Ampersand, semicolon.

63. Which of the following is a server-side Java Script object?

A. Function

B. File

C. FileUpload

D. Date

Correct : B. File

64. Which of the following is a client-side Java Script object?

A. Function

B. File

C. FileUpload

D. Date

Correct : C. FileUpload

65. Which of the following is the correct way for writing Java Script array?

A. var salaries = new Array(1:39438, 2:39839 3:83729)

B. var salaries = new (Array1=39438, Array 2=39839 Array 3=83729)

C. var salaries = new Array(39438, 39839,83729)

D. var salaries = new Array() values = 39438, 39839 83729

Correct : C. var salaries = new Array(39438, 39839,83729)

66. Which of the following syntax is correct to refer an external script called “formValidation.js”?

A. <script href = “formValidation.js”>

B. <script source = “formValidation.js”>

C. <script name = “formValidation.js”>

D. <script src = “formValidation.js”>

Correct : D. <script src = “formValidation.js”>

67. What is the alternate name for Java script?

A. LimeScript

B. Both a and d

C. ECMScript

D. ECMAScript

Correct : D. ECMAScript

68. What type of image map could be used with Java Script?

A. Client-side image maps

B. Server-side image maps.

C. Both A and B

D. Localhost image maps

Correct : A. Client-side image maps

69. Which of the following are capable of Java Script functions?

A. Returning multiple values

B. Accepting parameters and returning values

C. Accepting parameters

D. All choices are correct

Correct : C. Accepting parameters

70. Which of the following is not a valid JavaScript variable name?

A. 2java

B. _java_and_java_names

C. Javaandjava

D. None of the above

Correct : A. 2java

71. What java wrapper type is created when a JavaScript object is sent to Java?

A. ScriptObject

B. JavaObject

C. Jobject

D. JSObject

Correct : D. JSObject

72. Which of the following is correct to write “Hello World ” on the web page?

A. System.out.println(“Hello World”)

B. print(“Hello World”)

C. document.write(“Hello World”)

D. response.write(“Hello World”)

Correct : C. document.write(“Hello World”)

73. How does Java Script store dates in objects of Date type?

A. The number of days since 1st, 1900

B. The number of seconds since January 1st, 1970

C. The number of milliseconds since January 1st, 1970

D. The number of picoseconds since January 1st, 1970

Correct : C. The number of milliseconds since January 1st, 1970

74. Which attribute needs to be changed to make elements invisible?

A. Visibility

B. Visible

C. Invisibility

D. Invisible

Correct : A. Visibility

75. Which machine actually executed the Java Script?

A. The web server

B. The machine which is running a web server.

C. Java Script engine

D. Both A and C

Correct : B. The machine which is running a web server.

76. Which attribute is used to hold the Java Script Version?

A. SCRIPT

B. VERSION

C. LANGUAGE

D. VER

Correct : C. LANGUAGE

77. JavaScript RegExp Object has modifier 'i' to __________

A. Perform case-sensitive matching

B. Perform case-insensitive matching

C. Perform both case-sensitive&case-insensitive matching

D. None of above

Correct : B. Perform case-insensitive matching

78. How many ServletContext objects are available for an entire web application?

A. One each per servlet

B. One each per request

C. One each per response

D. Only one

Correct : D. Only one

79. Which of the following delegates the request handling to the RequestProcessor instance?

A. ActionServlet

B. Action class

C. Deployment descriptor

D. None of the above

Correct : A. ActionServlet

80. How many instances can be created per application module by the RequestProcessor class?

A. Four

B. Three

C. One

D. Uncountable instances

Correct : C. One

81. An instance of Action is invoked by

A. ActionServlet

B. ActionListener

C. RequestProcessor

D. All of the above

Correct : C. RequestProcessor

82. Application module selection is done by

A. Action class

B. ActionServlet

C. RequestProcessor

D. All of the above

Correct : B. ActionServlet

83. Which of the following methods is overridden by Action class?

A. execute()

B. service()

C. run()

D. destroy()

Correct : A. execute()

84. Which of the following should always forwards or redirect to a resource (view) after completed?

A. HttpResponse object

B. ActionServlet

C. Action class

D. Request Processor

Correct : D. Request Processor

85. Which of the following acts as a bridge between user-invoked URI and a business method?

A. HttpRequest

B. Action class

C. ActionServlet

D. RequestProcessor

Correct : B. Action class

86. Struts framework

A. should always decouple the application from a specific model implementation

B. provides model components

C. does not support JavaBeans and EJB

D. has built-in support for the model

Correct : A. should always decouple the application from a specific model implementation

87. Which of the following tags in struts-config.xml file defines the availability of necessary Struts JSP custom tag libraries?

A. < jsp-lib>

B. < struts-taglib>

C. < taglib>

D. < jsp-taglib>

Correct : C. < taglib>

88. Which can generate HTML dynamically on the client but can hardly interact with the web server to perform complex tasks like database access and image processing etc. in JSP?

A. vs.Static HTML

B. vs.Server-Side Includes

C. vs.Pure Servlets

D. Vs.JavaScript

Correct : D. Vs.JavaScript

89. Which attribute specifies a JSP page that should process any exceptions thrown but not caught in the current page?

A. The ErrorPage Attribute

B. The IsErrorPage Attribute

C. Both A & B

D. None of the above

Correct : B. The IsErrorPage Attribute

90. What technique is used for the authentication mechanism in the servlet specification?

A. Role Based Authentication

B. Form Based Authentication

C. Both A & B

D. None of the above

Correct : A. Role Based Authentication

91. In JSP Action tags which tags are used for bean development?

A. jsp:useBean

B. jsp:setPoperty

C. jsp:getProperty

D. All mentioned above

Correct : D. All mentioned above

92. Which two interfaces does the javax.servlet.jsp package have?

A. JspPage

B. HttpJspPage

C. PageContext

D. Both A & B

Correct : D. Both A & B

93. Which of the following is an advantage of the statement – Separation of business logic from JSP?

A. Custom Tags in JSP

B. JSP Standard Tag Library

C. All the above

D. None of the above

Correct : A. Custom Tags in JSP

94. JSPs eventually are compiled into Java servlets, you can do as much with JSPs as you can do with Java servlets.

A. True

B. False

C. none

D. all

Correct : A. True

95. How many jsp implicit objects are there and these objects are created by the web container that are available to all the jsp pages?

A. 8

B. 9

C. 10

D. 7

Correct : B. 9

96. JavaServer Pages often serve the same purpose as programs implemented using the Common Gateway Interface (CGI)

A. True

B. False

C. none

D. all

Correct : A. True

97. Which action tags are used in JSP for developing web application with Java Bean?

A. jsp:useBean

B. jsp:setProperty

C. jsp:getProperty

D. Both B & C

Correct : D. Both B & C

98. Which statement correctly identifies the goals of the designers of the EJB architecture?

A. The EJB architecture requires that users be aware of the low-level transaction details of the Java EE platform.

B. The EJB architecture is the standard component architecture for building distributed business applications in the Java programming language. (*)

C. Although the EJB architecture defines the contracts that enable tools to develop and deploy components, each application server vendor must produce its own set of additional tooling.

D. The EJB architecture provides a standard way of persisting state data using the Java Persistence API, Java Data Objects, and JDBC.

Correct : B. The EJB architecture is the standard component architecture for building distributed business applications in the Java programming language. (*)

99. Which statement about life-cycle callback methods is correct?

A. Life-cycle callback methods must be implemented in the bean class.

B. Life-cycle callback methods can have public, private, protected, or packagelevel access. (*)

C. A life-cycle callback method can only have a single callback annotation. In other words, you cannot define a single method and give it two different callback annotations.

D. Life-cycle callback methods can be declared as static.

Correct : B. Life-cycle callback methods can have public, private, protected, or packagelevel access. (*)

100. Which of the following types of Enterprise Java Bean will be most likely to be difficult to port from one App Server to another?

A. Stateful Session Beans

B. Stateless Session Bean

C. BMP (Bean Managed Persistence) Entity Bean

D. CMP (Container Managed Persistence) Entity Bean

Correct : D. CMP (Container Managed Persistence) Entity Bean

Quiznetik

Enterprise Computing With JAVA | Set 1

1. The __________tier processes HTTP protocol, scripting tasks, performs calculations, and provides access to data.

2. _________ are used to identify a user who returns to a Website.

3. Which one of the following objects is passed to a Java Bean when one of its properties is set via a JSP action?

4. Struts framework is based on

5. Action Servlet, Request Processor and Action classes are the components of

6. Which of the following delegates the request handling to the Request Processor instance?

7. How many instances can be created per application module by the Request Processor class?

8. An instance of Action is invoked by

9. What declarations are required for every Java application?

10. What is a compilation unit?

11. In order for a source code file, containing the public class Test, to successfully compile, which of the following must be true?

12. What are identifiers and what is naming convention?

13. What is the return type of program’s main( ) method?

14. What is the value of a[3] as the result of the following array declaration?

15. Which of the following are primitive types?

16. What is the range of the char type?

17. What are primitive data types?

18. What are default values of different primitive types?

19. How do we change the values of the elements of the array?

20. Which of the following features are common to both Java & C++?

21. Which of the following statements accurately describe the use of access modifiers within a class definition?

22. Which of the following statements can be used to describe a public method?

23. Which of the following statements correctly describes the relation between an object and the instance variable it stores?

24. What are the functions of the dot(.) operator?

25. When may a constructor be called without specifying arguments?

26. When might your program wish to run the garbage collecter?

27. Which method is used to specify before any lines that uses the PrintWriter?

28. Servlet mapping defines

29. The getSession() method with ‘true’ as its parameter [ getSession(true)] it will return the appropriate session object when

30. Dynamic interception of requests and responses to transform the information is done by

31. The method forward (request,response) will

33. Which of the following are the session tracking techniques?

34. The getSession() method with ‘true’ as its parameter [ getSession(true) ] it will return the appropriate session object when

35. RequestDispatcher object is used

36. The include() method of RequestDispatcher

37. To get the servlet environment information

38. The values of <servlet-name> and <servlet-class> in web.xml file

39. What is the limit of data to be passed from HTML when doGet() method is used?

40. In which advantage of servlet, Servlets are managed by JVM so no need to worry about memory leak, garbage collection etc.?

41. In the following statements identify the disadvantages of CGI?

42. Servlet technology is used to create web application?

43. In HTTP Request Which Asks for the loopback of the request message, for testing or troubleshooting?

44. In HTTP Request method Get request is secured because data is exposed in URL bar?

45. In the HTTP Request method which is non-idempotent?

46. Give the examples of Application Server from the following?

47. Abbreviate the term MIME?

48. Which packages represent interfaces and classes for servlet API?

49. The web container maintains the life cycle of a servlet instance,give the lifecycle of a servlet?

50. What are the contents of web module?

51. Which of the following are examples of JSP directive? Select the two correct answers.

52. A JSP page uses the java.util.ArrayList class many times. Instead of referring the class by its complete package name each time, we want to just use ArrayList. Which attribute of page directive must be specified to achieve this? Select the one correct answer.

53. A JSP page needs to generate an XML file. Which attribute of page directive may be used to specify that the JSP page is generating an XML file?

54. JSP pages have access to implicit objects that are exposed automatically. Name the implicit object that is of type HttpSession.

55. JSP pages have access to implicit objects that are exposed automatically. One such object that is available is request. The request object is an instance of which class?

56. What is the limitation of creating ActionServlet instances per web application?

57. ActionServlet, RequestProcessor and Action classes are the components of

58. Which of the java bean tags is used to show the bean value on the web page?

59. Which of the following are server side programming languages? 1.HTML 2.JavaScript 3.JSP 4.Sevlets

60. What JSP is basically used today?

61. What is the purpose of <noscript> tag in Java Script?

62. Java Script entities start with ___________and end with _____________

63. Which of the following is a server-side Java Script object?

64. Which of the following is a client-side Java Script object?

65. Which of the following is the correct way for writing Java Script array?

66. Which of the following syntax is correct to refer an external script called “formValidation.js”?

67. What is the alternate name for Java script?

68. What type of image map could be used with Java Script?

69. Which of the following are capable of Java Script functions?

70. Which of the following is not a valid JavaScript variable name?

71. What java wrapper type is created when a JavaScript object is sent to Java?

72. Which of the following is correct to write “Hello World ” on the web page?

73. How does Java Script store dates in objects of Date type?

74. Which attribute needs to be changed to make elements invisible?

75. Which machine actually executed the Java Script?

76. Which attribute is used to hold the Java Script Version?

77. JavaScript RegExp Object has modifier 'i' to __________

78. How many ServletContext objects are available for an entire web application?

79. Which of the following delegates the request handling to the RequestProcessor instance?

62. Java Script entities start with _and end with ___