Reverse a String in Java using Recursion
public class ReverseOfString { public static void main(String args[]) { String str = ...
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What is the difference between List and Set?
What is the difference between List and Set? List can contain duplicate elements whereas Set does not allow duplicate elements. List ma...
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Custom object as key in Collection
What do you need to do to use a custom object as key in Collection classes like Map or Set? Answer : If you are using any custom object ...
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ArrayList Vs Vector
ArrayList and Vector both implements List interface and maintains insertion order. 1) ArrayList is not synchronized whereas Vector is...
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Iterator Vs Enumeration VS ListIterator in Java Collection
Iterator , Enumeration and ListIterator are interface which are used to iterate over the collections in Java. Iterator provide iterato...
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SQL Interview Question Set 2
Write a SQL query to print the Name of the managers with id who are having more than 3 employee under him. employees(EMPLOYEE_ID,FIRST_N...
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Script to print the last modification time of file if exists
Write a script that accepts a file name as arguments and display the last modification time if the file exists and a suitable message if it...
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"grep" command interview Questions
We have three files in our current directory as below : Newfile.txt This is ishant gaurav I love to play cricket I am bit confused no...
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