What is Singleton? Restricts a class to instantiate its multiple objects and allows only one instance that has a control throughout the execution ...
Posts tagged Self Study
Change file system format: Fat32 -> NTFS
Follow the below steps to change file system format of SD card from Fat32 to NTFS on Linux. 1. Check SD card from file system: $ fdisk -l ...
Interrupt Handling in OP-TEE
World switches through Secure Monitor Call (SMC). A secure interrupt is signaled by the ARM GIC (Generic Interrupt Controller). There are two ...
Sorting Algorithms
Time complexity of sorting algorithms Selection Sort – Youtube Link From the beginning of an array, it finds minimum element in ...
P vs. NP
NP – Complete A problem p in NP is NP-complete if every other problem in NP can be transformed (or reduced) into p in polynomial time. It ...
Types of apps and frameworks
Native Apps are built with native APIs from specific platform such as IOS, Android, and BlackBerry. Pros High performance. Supports push ...
Shells
Shell is a program taking commands from a keyboard and giving them to operating system. Below are three popular shells on Linux. bash Bourne ...
Virtual Consoles
Virtual Consoles enable multi-user logins on a single machine. For example, you can login with your account and also as a root. By ...
Methodology: Qualitative vs. Quantitative
These two terms can be used as research methods. Qualitative used to gain an understanding of underlying reasons, opinions, and motivations ...
Down Call vs. Up Call
Down Call User code(unprivileged) enters to kernel with trap(interrupt). Up Call Kernel(privileged) enters to user code with IPC(Interprocess ...