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Ans. int[] arr = {1,-1,2,-3,3,-4,4,5,6,-5,-6,-7,-8,8,9,-9}; List positiveNumbers = new ArrayList<>(); List negativeNumbers = new ArrayList<>(); for(int i = 0; i < arr.length(); i ){ if(I < 0){ negativeNumbers.add(i); } else { positiveNumbers.add(i); } } System.out.println("Positive Numbers:" + positiveNumbers); System.out.println("Negative Numbers:" + negativeNumbers); | ||||
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Ans. int findMax(int[] items){ int maxNumber = 0; for(int x:items){ if(x > maxNumber){ maxNumber = x; } } return maxNumber; } | ||||
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Ans. public class TotalUsingThreads extends Thread{ private static List<TotalUsingThreads> collector = new ArrayList<TotalUsingThreads>(); private int startFrom = 0; private Integer threadTotal = null; Test(int startFrom){ this.startFrom = startFrom; } public static void main(String[] args) throws InterruptedException{ int totalSum = 0; // Create all the threads and set the count starting point for all of them for(int count=0;count<10;count++){ TotalUsingThreads newThread = new TotalUsingThreads(count*100); newThread.start(); collector.add(newThread); } boolean allCollected = false; // Make sure that all thread totals are collected and all threads have completed their tasks while(!allCollected){ for(int count=0;count<10;count++){ if(collector.get(count).threadTotal == null){ Thread.sleep(100); break; } } allCollected = true; } // sum totals of all threads for(int count=0;count<10;count++){ totalSum += collector.get(count).threadTotal; } System.out.println(totalSum); } public void run(){ threadTotal = 0; for(int count=startFrom;count<startFrom+100;count++){ threadTotal += count; } } } | ||||
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Ans. package com.string; import java.util.Scanner; public class String13 { public static void main(String[] args) { System.out.println("Enter Sentence"); Scanner sc=new Scanner(System.in); String sentence=sc.nextLine(); String[] words=sentence.split(" "); int count=0; for (String string : words) { string.trim(); if(!string.equals("")){ count++; System.out.println(string " " count); } } } } | ||||
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Ans. http://www.programmingsimplified.com/java/source-code/java-program-armstrong-number | ||||
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Ans. There are many problems with the code 1. The method returns void and hence we cannot return any integer value. 2. We cannot return more than one value from a method. 3. The code after 1st Return statement is unreachable. | ||||
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Ans. FALSE. == operator compares object references, a and b are references to two different objects, hence the FALSE. .equals method is used to compare string object content. | ||||
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Ans. Unicode requires 16 bits and ASCII require 7 bits. Although the ASCII character set uses only 7 bits, it is usually represented as 8 bits. UTF-8 represents characters using 8, 16, and 18 bit patterns. UTF-16 uses 16-bit and larger bit patterns. | ||||
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Ans. A way of encoding characters as binary numbers. The Unicode character set includes characters used in many languages, not just English. Unicode is the character set that is used internally by Java. | ||||
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Ans. convert(int binaryInt) { int sumValue=0; int multiple = 1; while(binaryInt > 0){ binaryDigit = binaryInt%10; binaryInt = binaryInt /10; sumValue = sumValue + (binaryDigit * multiple); multiple = multiple * 2; } return sumValue; } | ||||
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Ans. equal 1 | ||||
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Ans. public static void main(String ar[]) { int n=5; if((n/2)*2==n) { System.out.println("Even Number "); } else { System.out.println("Odd Number "); } } | ||||
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Ans. true, due to String Pool, both will point to a same String object. | ||||
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Ans. Compile time error as it won't find the constructor matching BuggyBread2(). Compiler won't provide default no argument constructor as programmer has already defined one constructor. Compiler will treat user defined BuggyBread2() as a method, as return type ( void ) has been specified for that. | ||||
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Ans. BuggyBread | ||||
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Ans. Buggy | ||||
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Ans. Buggy | ||||
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Ans. Compile Time Error: Unhandled exception type Exception | ||||
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Ans. file.txtC:file.txtC:file.txt | ||||
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Ans. NullPointerException at line: "File file = new File("/folder", name);" | ||||
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Ans. It will create the file myfile.txt in the current directory. | ||||
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Ans. NullPointerException at line:File file = new File("/folder", child); | ||||
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Ans. ..file.txt C:WorkspaceProject..file.txt C:Workspacefile.txt | ||||
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Ans. c. File file = new File("../file.txt"); FileWriter fileWriter = new FileWriter(file); BufferedWriter bufferedOutputWriter = new BufferedWriter(fileWriter); | ||||
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Ans. IOException | ||||
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Ans. FileNotFoundException | ||||
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Ans. Yes. | ||||
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Ans. Though we are trying to serialize BuggyBread1 object but we haven't declared the class to implement Serializable. This will throw java.io.NotSerializableException upon execution. | ||||
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Ans. No, It will throw java.io.NotSerializableException. | ||||
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Ans. Yes. | ||||
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