Mock paper & answers Added

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Designpattern3/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+<classpathentry kind="src" path="src"/>
+<classpathentry kind="output" path="bin"/>
+</classpath>

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Designpattern3/.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+<name>Designpattern3</name>
+<comment></comment>
+<projects>
+</projects>
+<buildSpec>
+<buildCommand>
+<name>org.eclipse.jdt.core.javabuilder</name>
+<arguments>
+</arguments>
+</buildCommand>
+</buildSpec>
+<natures>
+<nature>org.eclipse.jdt.core.javanature</nature>
+</natures>
+</projectDescription>

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Designpattern3/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Designpattern3/src/Action.java

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+
+public interface Action {
+public void Do();
+}

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Designpattern3/src/Developer.java

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+
+public class Developer {
+public static void main(String args[]) {
+IDE ide=new IDE();
+Receiver intendedreceiver = new Receiver();
+System.out.println("Pressed save button!");
+SaveAction saveaction = new SaveAction(intendedreceiver);
+ide.SetAction(saveaction);
+ide.ExecuteAction();
+
+System.out.println("Pressed saveAll button!");
+SaveAllAction saveallaction = new SaveAllAction(intendedreceiver);
+ide.SetAction(saveallaction);
+ide.ExecuteAction();
+}
+
+}

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Designpattern3/src/IDE.java

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+
+public class IDE {
+Action action;
+public void SetAction(Action action) {
+this.action = action;
+}
+public void ExecuteAction() {
+action.Do();
+}
+}
+

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Designpattern3/src/Receiver.java

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+
+public class Receiver {
+public void PerformSave() {
+System.out.println("Saving file...");
+}
+public void PerformSaveAll() {
+System.out.println("Saving all the files...");
+}
+}

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Designpattern3/src/SaveAction.java

@@ -0,0 +1,11 @@
+
+public class SaveAction implements Action{
+Receiver receiver;
+public SaveAction(Receiver receiver) {
+this.receiver = receiver;
+}
+public void Do() {
+receiver.PerformSave();
+}
+
+}

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Designpattern3/src/SaveAllAction.java

@@ -0,0 +1,10 @@
+
+public class SaveAllAction implements Action{
+Receiver receiver;
+public SaveAllAction(Receiver receiver) {
+this.receiver = receiver;
+}
+public void Do() {
+receiver.PerformSaveAll();
+}
+}

Past Papers/Mock paper Answers-20211018/Mock Esay Answers/Threads/WrappingPaperArt.java

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+import java.util.Scanner;
+
+public class WrappingPaperArt {
+
+public static void main(String[] args) {
+Object lock = new Object();
+Scanner sc = new Scanner(System.in);
+System.out.print("Enter Pattern 1 = ");
+String pattern1 = sc.next();
+System.out.print("Enter Pattern 2 = ");
+String pattern2 = sc.next();
+System.out.print("Enter count = ");
+int count = sc.nextInt();
+
+System.out.println("========Threads start printing patterns.=======");
+
+Thread patternThread1 = new Thread(new Pattern01(lock, pattern1, count));
+Thread patternThread2 = new Thread(new Pattern02(lock, pattern2, count));
+
+patternThread1.setName("Pattern 01 Thread");
+patternThread2.setName("Pattern 02 Thread");
+patternThread1.start();
+patternThread2.start();
+}
+}
+
+class Pattern01 implements Runnable{
+
+Object lock;
+String pattern;
+int count;
+
+public Pattern01(Object lock, String pattern, int count) {
+this.lock = lock;
+this.pattern = pattern;
+this.count = count;
+}
+
+@Override
+public void run() {
+synchronized (lock) {
+for (int x = 0; x < count; x++){
+try {
+lock.wait();
+for (int y = count; y >= x; y--) {
+System.out.print(" ");
+}
+for (int y = 0; y <= x; y++) {
+System.out.print("+ ");
+}
+System.out.println();
+Thread.sleep(1000);
+lock.notify();
+} catch (InterruptedException e) {
+e.printStackTrace();
+}
+}
+}
+}
+}
+
+class Pattern02 implements Runnable{
+
+Object lock;
+String pattern;
+int count;
+
+public Pattern02(Object lock, String pattern, int count) {
+this.lock = lock;
+this.pattern = pattern;
+this.count = count;
+}
+
+@Override
+public void run() {
+synchronized (lock) {
+for (int x = 0; x < count; x++){
+try {
+lock.notify();
+
+for (int y = count; y >= x; y--) {
+System.out.print(" ");
+}
+for (int y = 0; y <= x; y++) {
+System.out.print("- ");
+}
+System.out.println();
+Thread.sleep(1000);
+lock.wait();
+} catch (InterruptedException e) {
+e.printStackTrace();
+}
+}
+}
+}
+}
+

Past Papers/Mock paper Answers-20211018/mock MCQ - answers.txt

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+1->E
+2->C
+3->A,C
+4->B,C,D,E
+5->C
+6->E
+7->C
+8->C
+9->B
+10->A,B,C,D