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Core Java - Interview Questions and Answers for 'Reverse' - 2 question(s) found - Order By Newest

Very frequently asked in HCL Tech ( Based of 4 inputs )
  Q1. Write a program to reverse a string iteratively and recursively ?Core Java
Ans. Using String method -

new StringBuffer(str).reverse().toString();

Iterative -

public static String getReverseString(String str){
StringBuffer strBuffer = new StringBuffer(str.length);
for(int counter=str.length -1 ; counter>=0;counter--){
strBuffer.append(str.charAt(counter));
}
return strBuffer;
}

Recursive -

public static String getReverseString(String str){
if(str.length <= 1){
return str;
}
return (getReverseString(str.subString(1)) + str.charAt(0);
}

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   Like         Discuss         Correct / Improve     java   string   reverse   stringbuffer   string class   code     Asked in 6 Companies        frequent


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or

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 Q2. Do we have a method to reverse a string in String class ?Core Java
Ans. No but we have it in StringBuilder.

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

   Like         Discuss         Correct / Improve     String  StringBuilder  Reverse a string


Related Questions

  Difference between == and .equals() ?
  Why is String immutable in Java ?
  Explain the scenerios to choose between String , StringBuilder and StringBuffer ?

or

What is the difference between String , StringBuilder and StringBuffer ?
  Why Char array is preferred over String for storing password?
  What are different ways to create String Object? Explain.
  What is a String Pool ?
 How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?
 How is string object immutable if we can concat a string to it ?
  What is StringJoiner ?
  Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object?



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