Core Java - Interview Questions and Answers for 'String manipulation' | Search Java Interview Question

Core Java - Interview Questions and Answers for 'String manipulation' - 3 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

Ans. Using String method -

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

Iterative -

Strategy - Loop through each character of a String from last to first and append the character to StringBuilder / StringBuffer

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 -

Strategy - Call the method with substring starting from 2nd character recursively till we have just 1 character.

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 string StringBuffer recursion for loop control statements loop statement stringbuffer.append java.lang.String java.lang.StringBuffer String Manipulation Asked in 8 Companies frequent}

Q2. Suppose we have a string "Java is object oriented language" and we have to reverse every alternate word in string. How would we do that using Java program.

Core Java

^{2017-09-06 20:29:59}

^{This question was recently asked at 'datalake solutions'.This question is still unanswered. Can you please provide an answer.}

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_{Like Discuss Correct / Improve string manipulation code coding Asked in 1 Companies}

Q3. Write a Program to right shift single character in a string

^{2017-08-24 20:12:56}

Ans. public class RightShiftCharacter {
   public static void main(String args[]) {
      String str = "Hello";

      char[] charArray = str.toCharArray();

      for(int count=charArray.length-1;count>0;count--){
         charArray[count] = charArray[count-1];
      }

      String newString = new StringBuilder().append(charArray).toString();

      System.out.println(newString);
   }
}

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_{Like Discuss Correct / Improve string manipulation.right shift character}

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