Object-Oriented Programming Concepts

What represents an entity in the real world that can be distinctly identified?

What is a construct that defines objects of the same type?

An object is an instance of a __________.

The keyword __________ is required to declare a class.

What is invoked to create an object?

Which of the following statements are true? (Select all that apply)

Which of the following statements are true? (Select all that apply)

Analyze the following code and choose the correct statements:

public class Test {
 public static void main(String[] args) {
 A a = new A();
 a.print();
 }
}

class A {
 String s;

 A(String s) {
 this.s = s;}

 void print() {
 System.out.println(s);
 }
}

Analyze the following code and choose the correct statement:

class TempClass {
 int i;
 public void TempClass(int j) {
 int i = j;
 }
}

public class C {
 public static void main(String[] args) {
 TempClass temp = new TempClass(2);
 }
}

Given the declaration Circle x = new Circle(), which of the following statements is most accurate?

What happens when Test test = null; is executed followed by System.out.println(test.x);?

The default value for data field of a boolean type, numeric type, and object type is __________, respectively.

Which of the following statements are true? (Select all that apply)

Analyze the following code and find the reason for compile errors:

public class Test {
 public static void main(String[] args) {
 double radius;
 final double PI= 3.15169;
 double area = radius * radius * PI;
 System.out.println("Area is " + area);
 }
}

Analyze the following code and identify the issue:

public class Test {
 int x;

 public Test(String t) {
 System.out.println("Test");}

 public static void main(String[] args) {
 Test test = new Test();
 System.out.println(test.x);
 }
}

What is the outcome of compiling TestCircle.java and then Circle.java?

Which of the following statements are correct? (Select all that apply)

Which of the following code A or B, or both create an object of the Date class? (Select all that apply)

What can be placed in the blank line in the code?

public class Test {
 private int id;
 public void m1() {
 _____.id = 45;
 }
}```

Analyze the following code and outline its behavior:

class Test {
 private double i;
 public Test(double i) {
 this.t();
 this.i = i;
 }
 public Test() {
 System.out.println("Default constructor");
 this(1);
 }
 public void t() {
 System.out.println("Invoking t");
 }
}```

Analyze the following code and determine its behavior:

class Circle {
 private double radius;
 public Circle(double radius) {
 radius = radius;
 }
}```

You can declare two variables with the same name in __________.

What is the output for the third statement in the main method from the following Java code?

public class Foo {
 static int i = 0;
 static int j = 0;
 public static void main(String[] args) {
 int i = 2;
 int k = 3;
 {
 int j = 3;
 System.out.println("i + j is " + i + j);
 }
 k = i + j;
 System.out.println("k is " + k);
 System.out.println("j is " + j);
 }
}```

What is the output for the second statement in the main method from the following Java code?

public class Foo {
 static int i = 0;
 static int j = 0;
 public static void main(String[] args) {
 int i = 2;
 int k = 3;
 {
 int j = 3;
 System.out.println("i + j is " + i + j);
 }
 k = i + j;
 System.out.println("k is " + k);
 System.out.println("j is " + j);
 }
}```

What is the output for the first statement in the main method from the following Java code?

public class Foo {
 static int i = 0;
 static int j = 0;
 public static void main(String[] args) {
 int i = 2;
 int k = 3;
 {
 int j = 3;
 System.out.println("i + j is " + i + j);
 }
 k = i + j;
 System.out.println("k is " + k);
 System.out.println("j is " + j);
 }
}```

Which of the following statements are true about an immutable object? (Select all that apply)

Assume java.util.Date[] dates = new java.util.Date, which of the following statements are true? (Select all that apply)

Given the declaration Circle[] x = new Circle, which of the following statements is most accurate?

What is the output of the following program:

import java.util.Date;
public class Test {
 public static void main(String[] args) {
 Date date = new Date(1234567);
 m1(date);
 System.out.print(date.getTime() + " ");
 m2(date);
 System.out.println(date.getTime());
 }
 public static void m1(Date date) {
 date = new Date(7654321);
 }
 public static void m2(Date date) {
 date.setTime(7654321);
 }
}```

What is the value of times displayed?

public class Test {public static void main(String[] args) {
 Count myCount = new Count();
 int times = 0;
 for (int i=0; i