This is a commonly asked question that sadly confuses many computer science students. Confusion comes from the fact that the literal meaning of the two terms is very close. Also, the historical context of the two terms does not help much as different people use the terms differently. In this post I am going to
Introduction Before we start, I recommend that you read this post first. It talks about concurrency in operating systems and clarifies the main difference between multitasking, multithreading, multiprogramming and multiprocessing. If you are done, let us proceed and define some relevant terms so that things are put into perspective. In this article, I am targeting
System Call In order to better understand the difference between different call types, let us set some context for discussion. We are referring here to modern operating system (OS) design concepts. So, what are the main goals of having an OS in the first place ? Well, the OS achieves two primary goals for users.
Introduction Computer operating systems have been around for more than half a century so there is not much to add to the definition. Whether you are in the software industry or the academia, I assume you know what an operating system means but in few words an OS is the piece of software that sits
If it happens that you are confused by comparisons like the ones listed below then you came to the right place so please proceed and read the entire article for a better overview: Multiprogramming vs multiprocessing Multitasking vs multiprocessing Multitasking vs multithreading Introduction In the context of computing and operating systems, one might encounter many
Question In C++ what is the difference between copy constructor and assignment operator. If they are created for you by default then why do we need to create them in the first place. Assignment operator vs copy constructor Copy constructors and assignment operators are created by default even if you do not implement your own.
Question What is the difference between delete table and truncate table operation Answer Delete table operation deletes all rows in the table. The deletion of rows is logged in the transaction log. On the other hand truncate table operation similarly deletes all rows in the table but it does not log the deletion of rows
Question What is the difference between clustered and non clustered database index Answer A database index is a special data structure (tree, hash, etc) that improves the performance of data retrieval. There is nothing free so the performance gain comes with slower writes and increased storage space. Database index architecture can be classified into clustered
Question What is the difference between WHERE and HAVING clauses. Answer The WHERE clause restricts which rows are returned while the HAVING clause operates on groups of rows. HAVING is always used with GROUP BY and must have a function it restricts. The rule says if a condition refers to an aggregate function put that
