1) What will be the output of the following code? interface Test { void print(); } public class MyClass implements Test { void print() { System.out.println("Hello"); } public static void main(String[] args) { MyClass m = new MyClass(); m.print(); } } a. Hello b. Compilation error c. Runtime error d. None of the above 2) Predict the output of the following code: class Solution { static int x = 3; void increment() { x++; } void show() { System.out.println("x = " + x); } } public class Test_Questions { public static void main(String[] args) { Solution a = new Solution(); Solution b = new Solution(); a.increment(); b.increment(); a.show(); b.show(); } } a. x = 4 x = 4 b. x = 3 x = 3 c. x = 5 x = 5 d. Compilation error 3) What will be the output of the following program? class Base { public Base() { System.out.print("8"); } } class Sub extends Base { public Sub() { System.out.print("5"); super(); } public static void main(String[] args) { Base b = new Sub(); } } a. 85 b. 58 c. Compilation error d. Runtime error 4) Predict the output of the following code: abstract class Top { private String name; Top(String name){ this.name = name; } public String getName() { return name; } } public class Test extends Top{ Test() { super("Amit"); } public static void main(String[] args) { Top t = new Test(); System.out.println(t.getName()); } a. Compilation error will occur because abstract class cannot have constructor b. Compilation error will occur because abstract class must have an abstract method c. Compilation error will occur while invoking super class constructor d. Code will compile successfully and will print Amit 5). Predict the output of the following code: class Two extends One { final public int getOutput(int x, int y) { return x + y; } } class One extends Test_Questions { public int getOutput(int x, int y) { return x * y; } } public class Test_Questions { public static void main(String[] args) { One o = new Two(); System.out.println("x = " + o.getOutput(0, 1)); } } a. x = 1 b. x = 0 c. Compilation error d. Runtime error

1) What will be the output of the following code? interface Test { void print(); } public class MyClass implements Test { void print() { System.out.println("Hello"); } public static void main(String[] args) { MyClass m = new MyClass(); m.print(); } } a. Hello b. Compilation error c. Runtime error d. None of the above 2) Predict the output of the following code: class Solution { static int x = 3; void increment() { x++; } void show() { System.out.println("x = " + x); } } public class Test_Questions { public static void main(String[] args) { Solution a = new Solution(); Solution b = new Solution(); a.increment(); b.increment(); a.show(); b.show(); } } a. x = 4 x = 4 b. x = 3 x = 3 c. x = 5 x = 5 d. Compilation error 3) What will be the output of the following program? class Base { public Base() { System.out.print("8"); } } class Sub extends Base { public Sub() { System.out.print("5"); super(); } public static void main(String[] args) { Base b = new Sub(); } } a. 85 b. 58 c. Compilation error d. Runtime error 4) Predict the output of the following code: abstract class Top { private String name; Top(String name){ this.name = name; } public String getName() { return name; } } public class Test extends Top{ Test() { super("Amit"); } public static void main(String[] args) { Top t = new Test(); System.out.println(t.getName()); } a. Compilation error will occur because abstract class cannot have constructor b. Compilation error will occur because abstract class must have an abstract method c. Compilation error will occur while invoking super class constructor d. Code will compile successfully and will print Amit 5). Predict the output of the following code: class Two extends One { final public int getOutput(int x, int y) { return x + y; } } class One extends Test_Questions { public int getOutput(int x, int y) { return x * y; } } public class Test_Questions { public static void main(String[] args) { One o = new Two(); System.out.println("x = " + o.getOutput(0, 1)); } } a. x = 1 b. x = 0 c. Compilation error d. Runtime error

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

See similar textbooks

Related questions

Question

1) What will be the output of the following code?
interface Test {
void print();
}
public class MyClass implements Test {
void print() {
System.out.println("Hello");
}
public static void main(String[] args) {
MyClass m = new MyClass();
m.print();
}
}
a. Hello
b. Compilation error
c. Runtime error
d. None of the above
2) Predict the output of the following code:
class Solution {
static int x = 3;
void increment() {
x++;
}
void show() {
System.out.println("x = " + x);
}
}

public class Test_Questions {
public static void main(String[] args) {

Solution a = new Solution();
Solution b = new Solution();
a.increment();
b.increment();
a.show();
b.show();
}
}
a. x = 4
x = 4
b. x = 3
x = 3
c. x = 5
x = 5
d. Compilation error
3) What will be the output of the following program?
class Base {
public Base() {
System.out.print("8");
}
}
class Sub extends Base {
public Sub() {
System.out.print("5");
super();
}
public static void main(String[] args) {
Base b = new Sub();
}
}
a. 85
b. 58
c. Compilation error
d. Runtime error
4) Predict the output of the following code:
abstract class Top {
private String name;
Top(String name){
this.name = name;
}
public String getName() {
return name;
}
}

public class Test extends Top{
Test() {
super("Amit");
}
public static void main(String[] args) {
Top t = new Test();
System.out.println(t.getName());
}

a. Compilation error will occur because abstract class cannot have constructor
b. Compilation error will occur because abstract class must have an abstract method
c. Compilation error will occur while invoking super class constructor
d. Code will compile successfully and will print Amit
5). Predict the output of the following code:
class Two extends One {
final public int getOutput(int x, int y) { return x + y; }
}
class One extends Test_Questions {
public int getOutput(int x, int y) { return x * y; }
}

public class Test_Questions {
public static void main(String[] args) {

One o = new Two();
System.out.println("x = " + o.getOutput(0, 1));
}
}
a. x = 1
b. x = 0
c. Compilation error
d. Runtime error
Short answer type question 10 marks
• Explain the different access modifiers in detail with examples.
• Explain the difference between abstract class and interface with example.
Long answer Type question 10 marks
A) Write a program to print the sum of two complex numbers by creating a class named as
‘ComplexNumbers’ containing two data members, real and imaginary and two functions. First
function named as ‘plus’ adds the given two complex numbers and updates the first complex
number with the result and the second function named as 'print' prints the given sum in the format
‘a + ib’ where a is the real part and b is the imaginary part. Take the real and imaginary parts of
both the complex numbers as input from scanner and consider them to be positive integers.
Input Format :
Line 1 : Two integers- real and imaginary part of 1st complex number
Line 2 : Two integers- real and imaginary part of 2
nd complex number
Sample Input :
4 5
6 7
Sample Output :
10 + i12
B) Create an interface named ‘Figure’ with an abstract void method ‘shape()’. Now create two classes
‘Rectangle’ and ‘Triangle’ implementing the ‘Figure’ interface and having the method ‘shape()’
which will print “This is rectangular shape” and “This is triangular shape” respectively. Also create a
subclass ‘Square’ of ‘Rectangle’ having the method ‘shape()’ to print “Square is a rectangle with
equal sides”. Now call the method of ‘Rectangle’ and ‘Square’ class by the object of ‘Square’ class.
Expected Output:
This is rectangular shape
Square is a rectangle with equal sides