Don't get confused with the word "Constraints" as in English the meaning is totally different than what we are going to discuss today. SQL Constraints in simple words are the set of rules imposed on the data in the columns of a table. How should be the data in particular column, how should the data be displayed, which another data it is referring to and so on like these rules. So here I am going to add Interview Questions which are commonly asked about SQL Constraints in SQL with explanation … [Read more...] about SQL Constraint Interview Questions in Sql – Explained with Examples.
Before hopping onto file handling and other important questions related to it let us first really get to know what actually all the fuss is about file systems, their handling, access, manipulation among many others. Okay, so I'll prefer coming straight on basic concepts. What is FileSystem ? You can relate it basically with a particular data structure used for storing records or data by the respective operating system. Different filesystems are used depending upon the operating … [Read more...] about What is File handling
Often while preparing for interviews students forget to brush up some basic facts and topics which results in under-cooked performance. Although having said that I would like to shed some light on the concept of linked list. Linked list Linked list basically is a type of data structure use to store elements of a particular type. It uses node system where every node has a link to the next node and stores data. Now you might be thinking that What the heck is node system ? Node is basically … [Read more...] about Concept of Linked List