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Core Java - Interview Questions and Answers for 'Index' - 5 question(s) found - Order By Newest

 Q1. What is ArrayIndexOutOfBoundException ?Core Java
Ans. Exception thrown by the application is we try to access an element using an index which is not within the range of array i.e lower than 0 or greater than the size of the array.

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   Like         Discuss         Correct / Improve     java   exceptions   arrayindexoutofboundexception     Asked in 1 Companies


 Q2. What is meant by size and index of a collection ?Core Java
Ans. As the name suggest size is the size of collection / data structure i.e number of elements or memory utilized by the collection.

Index is the position of an element in a collection or data structure.

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   Like         Discuss         Correct / Improve     collection  index of collection  size of collection      Basic


 Q3. Write a Program to validate if a particular character occurs after another in a stringCore Java
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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   Like         Discuss         Correct / Improve     string  string.indexOf  coding  code


 Q4. What is difference between clustered and non clustered index?Database
Ans. The clustered index determines how the data is stored in the rows of a table.The non-clustered index stores the data at a single place and the indexes are stored at another place.

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   Like         Discuss         Correct / Improve     clustered vs non clustered index  index  database index     Asked in 1 Companies


 Q5. Difference between indexing and partioningDatabase
Ans. Creating an index creates a separate table. ... Indexes are used to speed the search of data within tables. Partitions provide segregation of the data at the hdfs level, creating sub-directories for each partition. Partitioning allows the number of files read and amount of data searched in a query to be limited

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   Like         Discuss         Correct / Improve     indexing  partitioning     Asked in 3 Companies



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