Q 1: Access class members from the same package Note: Classa and ClassB in this question are in the same package. public class ClassB { public int x = 1; int y = 2; private int z =3; } الملف عرف كل كلاس في ملف لانه لا يجوز أن يكون کلاسين public في نقس public class ClassA { public static void main(String[] args) { ClassB cb = new ClassB(); I/ System.out.-print(cb.x); /* 1 */ // System.out.print(cb.y); /* 2 */ !! System.out.print(cb.z); /* 3 */ } } 1.1- Which statement(s) are true? Choose all that apply. a. If statement 1 is uncommented, the code prints "1" to the output b. If statement 2 is uncommented, the code prints "2" to the output. c. If statement 3 is uncommented, the code prints "3" to the output. d. This code does not compile.

C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter11: Inheritance And Composition
Section: Chapter Questions
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Q 1: Access class members from the same package
Note: Classa and ClassB in this question are in the same package.
public class ClassB {
public int x = 1;
int y = 2;
private int z =3;
}
ملاحظة: عرف كل كلاس في ملف لانه لا يجوز أن يكون كاسين public في نقس الملف۔
public class ClassA {
public static void main(String[] args) {
ClassB cb = new ClassB();
// System.out.print(cb.x); /* 1 */
// System.out. print(cb.y); /* 2 */
// System.out. print(cb.z); /* 3 */
}
}
1.1- Which statement(s) are true? Choose all that apply.
a. If statement 1 is uncommented, the code prints "1" to the output.
b. If statement 2 is uncommented, the code prints "2" to the output.
c. If statement 3 is uncommented, the code prints "3" to the output.
d. This code does not compile.
1.2- Try to do the following:
• Declare a character type variable myChar in the class ClassB, the variable
myChar shouldn't be accessible through the object cb.
• Add a statement to the classA to test whether myChar is accessible.
Transcribed Image Text:Q 1: Access class members from the same package Note: Classa and ClassB in this question are in the same package. public class ClassB { public int x = 1; int y = 2; private int z =3; } ملاحظة: عرف كل كلاس في ملف لانه لا يجوز أن يكون كاسين public في نقس الملف۔ public class ClassA { public static void main(String[] args) { ClassB cb = new ClassB(); // System.out.print(cb.x); /* 1 */ // System.out. print(cb.y); /* 2 */ // System.out. print(cb.z); /* 3 */ } } 1.1- Which statement(s) are true? Choose all that apply. a. If statement 1 is uncommented, the code prints "1" to the output. b. If statement 2 is uncommented, the code prints "2" to the output. c. If statement 3 is uncommented, the code prints "3" to the output. d. This code does not compile. 1.2- Try to do the following: • Declare a character type variable myChar in the class ClassB, the variable myChar shouldn't be accessible through the object cb. • Add a statement to the classA to test whether myChar is accessible.
Q2: Different packages and access modifiers
Note: Classa and ClassB in this question are in two different
packages, while in the previous question, they were in the same
package.
package package_02;
public class classB {
public int x = 1;
int y = 2;
private int z =3;
}
package package_01;
import package_02.classB;
public class ClassA {
public static void main(String[] args) {
ClassB cb = new ClassB();
// System.out.print(cb.x); /* 1 */
// System.out.print(cb.y); /* 2 */
// System.out.print(cb.z); /* 3 */
}
}
2.1- Which statement(s) are true? Choose all that apply.
a. If statement 1 is uncommented, the code prints "1" to the output.
b. If statement 2 is uncommented, the code prints "2" to the output.
c. If statement 3 is uncommented, the code prints "3" to the output.
d. This code does not compile.
2.2- Try to do the following:
• Declare an integer variable called myInt in the ClassB; the variable myInt
should be accessible through the object cb.
• Write a statement in ClassA to check out the accessibility of your variable.
Transcribed Image Text:Q2: Different packages and access modifiers Note: Classa and ClassB in this question are in two different packages, while in the previous question, they were in the same package. package package_02; public class classB { public int x = 1; int y = 2; private int z =3; } package package_01; import package_02.classB; public class ClassA { public static void main(String[] args) { ClassB cb = new ClassB(); // System.out.print(cb.x); /* 1 */ // System.out.print(cb.y); /* 2 */ // System.out.print(cb.z); /* 3 */ } } 2.1- Which statement(s) are true? Choose all that apply. a. If statement 1 is uncommented, the code prints "1" to the output. b. If statement 2 is uncommented, the code prints "2" to the output. c. If statement 3 is uncommented, the code prints "3" to the output. d. This code does not compile. 2.2- Try to do the following: • Declare an integer variable called myInt in the ClassB; the variable myInt should be accessible through the object cb. • Write a statement in ClassA to check out the accessibility of your variable.
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