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Core java - Interview Questions and Answers for 'Minted llc' - 2 question(s) found - Order By Newest

  Q1. Write a method to check if input String is Palindrome?Core Java
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Ans. private static boolean isPalindrome(String str) {

if (str == null)
return false;

StringBuilder strBuilder = new StringBuilder(str);

strBuilder.reverse();

return strBuilder.toString().equals(str);

}

 Help us improve. Please let us know the company, where you were asked this question :   

   Like      Discuss      Correct / Improve     java   string   stringbuilder   stringbuilder   string class   code   palindrome     HCL Technologies  Hootsuite  ebay  Mobile Apps Company  TripAdvisor  Wallet Hub  Groupon  OpenText  Airbnb  Vantiv  Minted LLC  Boston Analytics  mint.com  Arista Networks  Dealer.com  the Zappos Family  Sony PlayStation  Taser  Wolters Kluwer  Wize Commerce  Hitachi Consulting  Quickr  SmartBrief  Liaison International  Monitise  Exilant Technologies  Enova  Wayfair  Amadeus  MakeMyTrip  Naggaro  Vudu  OnDeck Capital  HighRadius   thePlatform  Trimax IT Infrastructure & Services      Basic        frequent


Related Questions

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a. Transient
b. Final
c. Explicit
d. Synchronized
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1. new OuterClass().new InnerClass();

2. new OuterClass.InnerClass();
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 What is the difference between these two approaches of creating singleton Class ?

//Double Checked Locking Code
public static Singleton createInstance() {
   if(singleton == null){
      synchronized(Singleton.class) {
         if(singleton == null) {
            singleton = new Singleton();
         }
      }
   }
   return singleton;
}

//Single checked locking code
public static Singleton createInstance() {
   synchronized(Singleton.class) {
      if(singleton == null) {
         singleton = new Singleton();
      }
   }
   return singleton;
}
 What is the difference between following two segments of code

Code 1

int x = 4 * 3;
int y = x * 5;

Code 2

int y = 4 * 3 * 5;

 What is the following code doing ?

private static final String[] COLORS = new String[] { "Red", "Green", "Blue" };


Usually asked to entry level software developers.
  Q2. Write a program to swap two variables without using thirdCore Java2017-01-19 15:38:34

Ans. public static void main(String[] args) {
   int num1 = 1;   
   int num2 = 2;
   num1 = num1^num2;
   num2 = num1^num2;
   num1 = num1^num2;
   System.out.print("num1 = " + num1 +", num2 = "+num2);
}

 Help us improve. Please let us know the company, where you were asked this question :   

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