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The following method will return true if the int parameter is even and non-negative (meaning positive or 0), and false otherwise. For example, invoking with 0, 2, 4, 6, or 8 will return true. Invoking with -4, -3, -2, -1, 1, 3, 5, or 7 will return false. Which set of code should be added so that the method works appropriately? public boolean evenPosZero(int x) { if(x<0) { return false; } } // ??? what goes here there is more than one answer that will work correctly else { } return(x==0); else if (x== 0) { return true; } else { } return evenPosZero (x - 2); else if (x==0) { return true; } else { } return evenPosZero(x - 1); none of these is correct else if (x==0) { return false; } else { } return evenPosZero(x - 1);

The following method will return true if the int parameter is even and non-negative (meaning positive or 0), and false otherwise. For example, invoking with 0, 2, 4, 6, or 8 will return true. Invoking with -4, -3, -2, -1, 1, 3, 5, or 7 will return false. Which set of code should be added so that the method works appropriately? public boolean evenPosZero(int x) { if(x<0) { return false; } } // ??? what goes here there is more than one answer that will work correctly else { } return(x==0); else if (x== 0) { return true; } else { } return evenPosZero (x - 2); else if (x==0) { return true; } else { } return evenPosZero(x - 1); none of these is correct else if (x==0) { return false; } else { } return evenPosZero(x - 1);

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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The following method will return true if the int parameter is even and non-negative (meaning positive or 0), and false otherwise. For example, invoking with 0, 2, 4, 6, or 8 will return true. Invoking with -4, -3, -2, -1, 1, 3, 5, or 7 will return false. Which set of code should be added so that the method works appropriately? ```java public boolean evenPosZero(int x) { if(x<0) { return false; } // ??? what goes here } ``` Options: 1. Option A: - there is more than one answer that will work correctly 2. Option B: ```java else { return(x==0); } ``` 3. Option C: ```java else if (x==0) { return true; } else { return evenPosZero(x - 2); } ``` 4. Option D: ```java else if (x==0) { return true; } else { return evenPosZero(x - 1); } ``` 5. Option E: - none of these is correct 6. Option F: ```java else if (x==0) { return false; } else { return evenPosZero(x - 1); } ```
Transcribed Image Text:The following method will return true if the int parameter is even and non-negative (meaning positive or 0), and false otherwise. For example, invoking with 0, 2, 4, 6, or 8 will return true. Invoking with -4, -3, -2, -1, 1, 3, 5, or 7 will return false. Which set of code should be added so that the method works appropriately? ```java public boolean evenPosZero(int x) { if(x<0) { return false; } // ??? what goes here } ``` Options: 1. Option A: - there is more than one answer that will work correctly 2. Option B: ```java else { return(x==0); } ``` 3. Option C: ```java else if (x==0) { return true; } else { return evenPosZero(x - 2); } ``` 4. Option D: ```java else if (x==0) { return true; } else { return evenPosZero(x - 1); } ``` 5. Option E: - none of these is correct 6. Option F: ```java else if (x==0) { return false; } else { return evenPosZero(x - 1); } ```
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