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Interview Questions and Answers for 'Fidelity national information services (fis)' - 4 question(s) found - Order By Newest

Frequently asked in Infosys India
  Q1. What is a String Pool ?Core Java
Ans. String pool (String intern pool) is a special storage area in Java heap. When a string is created and if the string already exists in the pool, the reference of the existing string will be returned, instead of creating a new object and returning its reference.

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   Like         Discuss         Correct / Improve     java   oops   string   string class   string pool   heap memory     Asked in 31 Companies      intermediate        frequent

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Very frequently asked in HCL Tech ( Based of 4 inputs )
  Q2. 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


 Q3. What is the difference between ServletConfig and ServletContext ?Java EE
Ans. http://www.java4s.com/java-servlet-tutorials/difference-between-servletconfig-and-servletcontext-in-java/

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   Like         Discuss         Correct / Improve     ServletConfig  ServletContext     Asked in 1 Companies


 Q4. Is there any relationship between Web.xml and Spring.xml ?Spring
Ans. No, there is no relationship between web.xml and spring.xml but you have to configure spring.xml in web.xml in order initialize beans when application starts up

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   Like         Discuss         Correct / Improve     spring  web.xml  spring.xml  deployment descriptor     Asked in 1 Companies



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