Useful tips for everyday
How do I remove duplicate values from multiple columns in SQL? The best way to delete duplicate rows by multiple columns is the simplest one:…
What does it mean when a number is square free? In mathematics, a square-free integer (or squarefree integer) is an integer which is divisible by…
What is the subnet mask for 32? 255.255.255.255 Understanding CIDR Subnet Mask Notation Subnet Mask CIDR Prefix Total IP Addresses 255.255.255.255 /32 1 255.255.255.254 /31…
How does an electronic relay work? Relays control one electrical circuit by opening and closing contacts in another circuit. As relay diagrams show, when a…
How do you secure a symmetric key? There are two types of symmetric encryption algorithms: Block algorithms. Set lengths of bits are encrypted in blocks…
Can optional value be null? Optional is primarily intended for use as a method return type where there is a clear need to represent “no…
How a triangular wave generated from square wave generator? A triangular wave is generated by alternatively charging and discharging a capacitor with a constant current.…
How to enable SSH on Windows Subsystem for Linux? Run the command: ssh username@machinename (if you dont have a netbios enabled router, you should use…
How do I get rid of the iOS update message? To remove the update is very easy; you just have to follow the steps below…
How do I recover a blank SD card? Part 2. How to Recover Data Files from Blank SD Card Select your Blank SD Card. Make…