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Ans. OOPs or Object Oriented Programming is a Programming model which is organized around Objects instead of processes. Instead of a process calling series of processes, this model stresses on communication between objects. Objects that all self sustained, provide security by encapsulating it's members and providing abstracted interfaces over the functions it performs. OOP's facilitate the following features 1. Inheritance for Code Reuse 2. Abstraction for modularity, maintenance and agility 3. Encapsulation for security and protection 4. Polymorphism for flexibility and interfacing | ||||
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This question was recently asked at 'Ola Cabs'.This question is still unanswered. Can you please provide an answer. | ||||
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Ans. int compare(int a, int b) { a>b? return a: return b; } | ||||
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This question was recently asked at 'Amazon'.This question is still unanswered. Can you please provide an answer. | ||||
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Ans. It means that Java is compiled to byte code that is platform independent and hence can be run anywhere or any machine. | ||||
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Ans. int convert(int binaryInt) { int sumValue=0; int multiple = 1; while(binaryInt > 0) { binaryDigit = binaryInt; binaryInt = binaryInt /10; sumValue = sumValue (binaryDigit * multiple); multiple = multiple * 2; } return sumValue; } | ||||
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This question was recently asked at 'Horizon Solutions'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Bind Software Innovations'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Compro Technologies'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Amazon'.This question is still unanswered. Can you please provide an answer. | ||||
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This question was recently asked at 'Amazon'.This question is still unanswered. Can you please provide an answer. | ||||
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Ans. https://www.geeksforgeeks.org/check-for-balanced-parentheses-in-an-expression/ | ||||
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This question was recently asked at 'karya technology'.This question is still unanswered. Can you please provide an answer. | ||||
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Ans. public class Class{ public static void main(String[] args){ String str = "xyz123.co@m"; if(str.indexOf('.') < str.indexOf('@')){ System.out.println("Not a Valid Email Address"); } } } | ||||
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Ans. public class Class{ public static void main(String[] args){ String str = "xyz@123.com"; if(!str.contains("@") && !str.contains(".") && (str.indexOf('.') < str.indexOf('@'))){ System.out.println("Not a Valid Email Address"); } } } | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { for(int x=1;x<=10;x++){ for(int y=1;y<=x;y++){ System.out.print("*"); } System.out.println(""); } } } | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { displayNumbersBetween(5,7); } private static void displayNumbersBetween(int start,int end){ if(start > end){ return ; } else { for(int x=1;x<=start;x++){ System.out.print("*"); } System.out.println(""); displayNumbersBetween(start+1,end); } } } | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { displayNumbersBetween(2,10); } private static void displayNumbersBetween(int start,int end){ if(start > end){ return ; } else { System.out.println(start); displayNumbersBetween(start+1,end); } } } | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { String str = "we are what we repeatedly do excellence then is not an act but a haBit"; Set<String> wordSet = new TreeSet(); // Using Linked Hash Set as we would like to retrieve words in the insertion order for(String word: str.split(" ")){ wordSet.add(word); } for(String word: wordSet){ System.out.print(word); System.out.print(" "); } } } | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { String str = "we are what we repeatedly Do excellence, then, is not an act but a haBit"; Set<String> wordSet = new LinkedHashSet(); // Using Linked Hash Set as we would like to retrieve words in the insertion order for(String word: str.split(" ")){ wordSet.add(word); } for(String word: wordSet){ System.out.print(word); System.out.print(" "); } } } | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { String str1 = "we are what we repeatedly Do excellence, then, is not an act but a haBit"; String str2 = "we are what we repeatedly Do is"; String[] str1Words = str1.split(" "); String[] str2Words = str2.split(" "); Set str1WordsSet = new HashSet(); for(String word:str1Words){ str1WordsSet.add(word); } int commonWordsCount = 0; for(String word:str2Words){ if(str1WordsSet.contains(word)){ commonWordsCount++; } } System.out.println(commonWordsCount); } } | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { String str1 = "we are what we repeatedly Do excellence, then, is not an act but a haBit"; String str2 = "we are what we repeatedly Do is"; String[] str1Words = str1.split(" "); String[] str2Words = str2.split(" "); Set str1WordsSet = new HashSet(); for(String word:str1Words){ str1WordsSet.add(word); } for(String word:str2Words){ if(str1WordsSet.contains(word)){ System.out.println(word); } } } } | ||||
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Ans. 1. Object Level Reuse - private methods 2. Class Level Reuse - static methods 3. package level Reuse - default methods 4. Application Level Reuse - Classes 5. Multiple Applications Level Reuse - Libraries , Frameworks | ||||
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Ans. import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.io.*; public class Common { public static void main(String ar[])throws Exception { File f=new File("a.txt"); File f1=new File("x.java"); System.out.println(f.exists()); FileInputStream fin = new FileInputStream(f); FileInputStream fin1 = new FileInputStream(f1); byte b[]=new byte[10000]; byte b1[]=new byte[10000]; fin.read(b); fin1.read(b1); String s1 = new String(b); String s2 =new String(b1); String words1[] = s1.trim().split(" "); String words2[] = s2.trim().split(" "); Listlist1 = new ArrayList<>(Arrays.asList(words1)); Listlist2 = new ArrayList<>(Arrays.asList(words2)); list1.retainAll(list2); System.out.println(list1); } } | ||||
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Ans. public class BuggyBread{ public static void main (String args[]) { Set<Character> set = new HashSet(); Set<Character> setWithDuplicateChar = new HashSet(); String str = "hello world"; for(char character: str.toCharArray()){ if(set.contains(character)){ setWithDuplicateChar.add(character); } else { set.add(character); } } System.out.println(setWithDuplicateChar); } } | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { Map<Character, Integer> countMap = new HashMap(); String str = "hello world"; for (char character : str.toCharArray()) { if (countMap.containsKey(character)) { countMap.put(character, countMap.get(character) + 1); } else { countMap.put(character, 1); } } System.out.println(countMap); } } | ||||
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Ans. public class BuggyBread1{ public static void main (String args[]) { String str = "hheello world"; char[] charArray = str.toCharArray(); char selectedChar = 'a'; for(char char1: charArray){ if(!str.contains(Character.toString(char1).concat(Character.toString(char1)))){ selectedChar = char1; break; } } System.out.println(str.indexOf(Character.toString(selectedChar))); } } | ||||
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Ans. Yes , It can be done using single for loop public class BuggyBread{ public static void main (String args[]) { int x = 50; for(int i=1;i <= 100;i++){ if(i<=50){ System.out.println(i*2); } else { System.out.println(i-x); x = x - 1; } } } } | ||||
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Ans. public class Class{ public static void main(String[] args){ for(int i=1;i<= 100;i++){ if(i%3 == 0){ if(i%5 == 0){ System.out.println("FizzBuzz"); } System.out.println("Fizz"); } else if(i%5 == 0){ System.out.println("Buzz"); } else { System.out.println(i); } } } } | ||||
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Ans. public class Class { public static void main(String[] args) { String str = "mallam"; String firstHalf = str.substring(0, str.length() / 2); String secondHalf = str.substring(str.length() / 2); if (firstHalf.equals(new StringBuilder(secondHalf).reverse().toString())) { System.out.println("It's a Colidrome"); } else { System.out.println("It's not a Colidrome"); } } } | ||||
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