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Q51. - (Topic 2) 

You are asked to create a Dog class that exposes the Dog class String name and int breed to other code as read-only attributes, provides encapsulation, and adheres to the standard JavaBeans naming conventions. 

Which approach implements these requirements? 

A. Provide public name() and public breed() methods in the Dog class, and mark the name and breed instance variables private. 

B. Provide public getName()/setName() and public getBreed()/setBreed() methods in the Dog class, and mark the name and breed instance variables private. 

C. Provide private getName() and private getBreed() methods in the Dog class, and mark the name and breed instance variables private. 

D. Provide private name() and private breed() methods in the Dog class, and mark the name and breed instance variables public. 

E. Provide public getName() and public getBreed() methods in the Dog class, and mark the name and breed instance variables private. 

Answer:


Q52. - (Topic 1) 

Given: 

1.

 class Test { 

2.

 public static void main(String args[]) { 

3.

 int num1 = 10, num2 = 20, result; 

4.

 result = calc(num1, num2); 

5.

 System.out.println(result); 

6.

 } 

7. 

8.

 // insert code here 

9.

 } 

Which, inserted at line 8, produces the output 30? 

A. static int calc(int n1, int n2) { return n1 + n2; } 

B. static void calc(n1, n2) { return (n1 + n2); } 

C. public int calc(int n1, int n2) { return; } 

D. static int calc(int n1, int n2) { return; } 

E. public int calc(int n1, int n2) { return n1 + n2; } 

F. static int calc(int n1, n2) { return n1, n2; }; 

Answer:


Q53. - (Topic 2) 

Given: 

1.

 interface Flyer { 

2.

 void takeOff(); 

3.

 boolean land(); 

4.

 } 

5.

 class Airplane implements Flyer { 

6.

 public void takeOff() { /* some code */ } 

7.

 // insert code here 

8.

 return true; 

9.

 } 

10.

 } 

Which, inserted at line 8, correctly implements the interface? 

A. boolean land(int i) { 

B. public void land() { 

C. protected boolean land() { 

D. public boolean land() { 

E. boolean land() { 

Answer:


Q54. - (Topic 1) 

Given: 

Directory structure: projects |__src | |__foo | |__classes 

A file Clock.java in the /projects/src/foo directory The working directory /projects/src 

The class Clock in package foo 

Which command-line compiler invocation will create a foo directory within the classes directory, and then place the compiled Clock.class within that directory? 

A. javac -directory ../classes/foo foo/Clock.java 

B. javac -d ../classes/foo/Clock.java 

C. javac -d ../classes/foo foo.Clock.java 

D. javac -D foo/Clock.java 

E. javac -d ../classes foo/Clock.java 

Answer:


Q55. - (Topic 2) 

Click the Exhibit button. 

Which code correctly implements the association between A and B? 

A. class A { } 

class B { 

private A[] a; 

B. class A { } 

class B { 

private A a; 

C. class A { 

private B b; 

class B { 

private A[] a; 

D. class A { 

private B[] b; 

class B { 

private A a; 

E. class A { 

private B b; 

class B { } 

F. class A { 

private B[] b; 

class B { } 

Answer:


Q56. - (Topic 1) 

Click the Exhibit button. Which code correctly implements the association between A and B? 

A. class A { 

private B[] b; 

class B { 

private A a; 

B. class A { 

private B[] b; 

class B { } 

C. class A { } 

class B { 

private A[] a; 

D. class A { } 

class B { 

private A a; 

E. class A { 

private B b; 

class B { 

private A[] a; 

F. class A { 

private B b; 

class B { } 

Answer:


Q57. - (Topic 2) 

Click the Exhibit button. Which is true about the use of italics in this diagram? 

A. The use of italics indicates that Blipvert is an abstract class. 

B. The use of italics indicates that Blipvert is an enumeration. 

C. The use of italics indicates that Blipvert is an interface. 

D. The use of italics carries no standard UML meaning. 

E. The use of italics indicates that Blipvert is a final class. 

Answer:


Q58. - (Topic 2) 

Which two describe benefits of encapsulation? (Choose two.) 

A. Code is more flexible because the attributes can be modified directly from code in other packages. 

B. Code is more reusable because the attributes of the class are protected from direct modification by other code. 

C. Code is safer because attributes of the class CANNOT be directly modified by code outside the class. 

D. Code is more useful because attributes of the class can be accessed by other classes for both reading and writing. 

E. Code is more efficient because attributes of the class can be accessed directly by other classes, without the overhead of going through access methods. 

Answer: B,C 


Q59. - (Topic 2) 

Which is an advantage of RMI over sockets? 

A. Interactive communication is NOT possible using sockets. 

B. RMI transmission speed is faster than sockets. 

C. It is NOT necessary to implement an application-level communication protocol to use RMI. 

D. Sockets CANNOT transmit objects. 

Answer:


Q60. - (Topic 2) 

What is the correct name for J2EE? 

A. Java 2 Package, Enterprise Edition 

B. Java 2 Platform, Enterprise Environment 

C. Java 2 Package, Enterprise Environment 

D. Java 2 Platform, Enterprise Edition 

Answer: