Sun 310-025 Study Guide

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310-025 Sun Sun Java Certified Programmer

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Exam Name: Exam Type: Exam Code:

Sun Certified Java Programmer Sun 310-025

Total Questions:

Question 1. Given: 1. public class Test { 2. public static void main (String [] args) { 3. string foo = “blue”; 4. string bar = foo; 5. foo = “green”; 6. System.out.printIn(bar); 7. } 8. } What is the result? A. An exception is thrown. B. The code will not compile. C. The program prints “null ” D. The program prints “blue ” E. The program prints “green ” Ans: D Question 2. Which code determines the int value foo closest to a double value bar? A. Int foo =(int)Math.max(bar); B. Int foo =(int)Math.min(bar); C. Int foo =(int)Math.abs(bar); D. Int foo =(int)Math.ceil(bar); E. Int foo =(int)Math.floor(bar); F. Int foo =(int)Math.round(bar); Ans: F Question 3. Which two demonstrate encapsulation of data?(Choose Two) A. Member data have no access modifiers. B. Member data can be modified directly. C. The access modifier for methods is protected. D. The access modifier to member data is private. E. Methods provide for access and modification of data. Ans: D & E

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Exam Name: Exam Type: Exam Code:

Sun Certified Java Programmer Sun 310-025

Total Questions:

160

Question 4. Exhibit: 1. class A { 2. public String toString () { 3. return “4”; 4. } 5. } 6. class B extends A { 7. 8. public String toString () { 8. return super.toString() + “3”; 9. } 10. } 11. public class Test { 12. public static void main(String[]args) { 13. System.out.printIn(new B()); 14. } 15.} What is the result? A. Compilation succeeds and 4 is printed. B. Compilation succeeds and 43 is printed. C. An error on line 9 causes compilation to fail. D. An error on line 14 causes compilation to fail. E. Compilation succeeds but an exception is thrown at line 9. Ans: B Question 5. Which two statements are true?(Choose Two) A. An anonymous inner class can be declared inside of a method B. An anonymous inner class constructor can take arguments in some situation. C. An anonymous inner class that is a direct subclass that is a direct subclass of Object can implement multiple interfaces. D. Even if a class Super does not implement any interfaces,it is still possible to define an anonymous inner class that is an immediate subclass of Super that implements a single interface. E. Event if a class Super does not implement any interfaces,it is still possible to define an anonymous inner class that is an immediate subclass of Super that implements multiple interfaces. Ans: A & B

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Exam Name: Exam Type: Exam Code:

Sun Certified Java Programmer Sun 310-025

Total Questions:

160

Question 6. Given: 1. public class MethodOver { 2. private int x, y; 3. private float z; 4. public void setVar(int a, int b, float c){ 5. x = a; 6. y = b; 7. z = c; 8. } 9. } Which two overload the setVar method? (Choose Two) A. void x y z } B. public setVar(a,b,c); } C. public this(a,b,c); } D. public x z } E. public x y z }

setVar

(int

void

setVar(int

a,float

c,int

b){

void

setVar(int

a,float

c,int

b){

void

void

a,int

setVar(int

setVar(int

b,float

a,float

ax,int

by,float

c){ =a; =b; =c;

b){ =a; =b; cz){ =ax; =by; =cz;

Ans: B & D Question 7. Which statements about static inner classes are true?(Choose Two) A. B. C. D. E.

A static inner class requires a static initializer. A static inner class requires an instance of the enclosing class. A static inner class has no reference to an instance of the enclosing class. A static inner class has access to the non-static members of the outer class. Static members of a static inner class can be referenced using the class name of the static inner class.

Ans: C & E

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