What is the error in the following code?

int val1 = -14,val2 = 4;

final int val3 = 9;

double val4 = 4.1;

double val5 = 3.1;

val1 = val2 * val3;

val3 = val1 * 12;

val5 = val1 - val3;

val4 = val2 + val5;

Consider the following code:

public static class Rectangle {

private double width, height;

public Rectangle(double w,double h) {

width = w;

height = h;

}

``

public double getArea() {

return width * height;

}

``

public double getPerimeter() {

return 2 * width + 2 * height;

}

}

``

public static class Square extends Rectangle {

public Square(double s) {

super(s,s);

}

}

public static void main(String[] args) {

Rectangle[] rects = new Rectangle[6];

for(int i = 0; i < 6; i++) {

if(i % 2 == 0) {

rects[i] = new Rectangle(i+10,i + 20);

} else {

rects[i] = new Square(i+20);

}

}

Square s = rects[1];

}

What is the error in the code above?

public interface ServerInstance {

byte[] readBytes();

boolean writeBytes(byte[]b);

boolean wake();

boolean status();

void sleep();

}

``

public class MyHost implements ServerInstance {

boolean running = false;

public boolean wake() {

// Other logic code here...

return running;

}

public boolean status() {

// Other logic code here...

return running;

}

public byte[] readBytes() {

byte[] buffer = null;

// Other logic code here...

return buffer;

}

public void sleep() {

// Other logic code here...

running = false;

}

public byte[] writeBytes(byte[] b) {

// Other logic code here...

return b;

}

// Other methods...

}

What is the error in the code above?

Given:

const int x = 10;

Which of the following will compile?

public static void main(String[] args) {

int[] x = {3,4,4,5,17,4,3,1};

int[] y = remove(x,4);

for(int i = 0; i < y.length; i++) {

System.out.print(y[i] + " ");

}

}

``

public static boolean remove(int[] arr, int val) {

boolean found = false;

int i;

for(i = 0; i < arr.length && !found; i++) {

if(arr[i] == val) {

found = true;

}

}

if(found) {

for(int j = i; j < arr.length;j++) {

arr[j - 1] = arr[j];

}

arr[arr.length - 1] = 0;

}

return found;

}

What is the error in the code above?

public static void foo() {

int x = 10; y = 21, z = 30;

int[] arr = null;

for(int i = 0; i < y; i+= 4) {

arr = new int[i / 5];

}

for(int i = 0; i < x; i++) {

arr[i] = z / i;

}

for(int i = 0; i < z; i++) {

arr[i] = z * i;

}

}

Which of the following lines of code will cause a compile-time error?

class Base{

protected:

void method();

};

class Derived : public Base{

};

int main(){

Base b;

b.method(); //Line A

Derived d;

d.method(); //Line B

}

Which of the following is true?

class Base{};

class Derived : public Base{

public:

void method(){ cout<< "method1
"; }

};

class Derived2 : public Base{

public:

void method() { cout<< "method2
"; }

};

int main(){

Base* bp = new Derived();

Derived2* d2p = bp;

d2p -> method();

}

What is the result of compiling and running the program in C++?