All CS101 Articles

Encryption algorithms protect data by turning readable information into unreadable code. They help secure messages, online purchases, accounts, and stored files from unauthorized access. In this article, I explain how encryption algorithms work, why they matter for cybersecurity, and how keys and methods help modern systems keep data safe.

What are interrupts? They are signals that tell a processor to pause normal execution and respond to an urgent event. Interrupts support multitasking, user input, timers, and hardware communication. In this article, I explain what are interrupts, how they work, and why they keep modern computer systems fast, responsive, and reliable.

What is a parity bit in computer science? It is an extra bit added to binary data to help detect simple transmission or storage errors. A parity bit checks whether the number of 1s is even or odd. In this article, I explain how parity works, where it is used, and why it supports reliable digital communication.

Direct memory access helps devices transfer data directly to and from memory with less CPU involvement. This improves speed, reduces processor workload, and supports smoother multitasking. In this article, I explain direct memory access, how it works, and why it improves performance in modern computer systems.

What is a Flipflop? It is a small digital circuit that stores one bit of data. Flipflops help computers remember binary states and build memory, registers, and control systems. In this article, I explain how flipflops work and how billions of them support the computing power we use every day.

Subroutines across languages help me see how functions, methods, and procedures solve repeated tasks in different ways. They make code clearer, reusable, and easier to maintain. In this article, I explain how data moves into and out of subroutines across languages, with practical examples that show how popular programming languages handle them.

What are subroutines? They are reusable blocks of code that help programs handle repeated tasks with less duplication. Subroutines make software clearer, more organized, and easier to maintain. In this article, I explain what are subroutines, how they work, and why they matter in computer science.

Stack pointers may seem complex at first, but they are vital for low-level computing. They help manage subroutines, memory, return addresses, and interrupts with precision. In this article, I explain what stack pointers are, how they work, and why they support efficient program execution inside modern computer architecture.

When I first studied computer architecture, the term processor register stood out. A processor register stores small pieces of data directly inside the CPU. This allows fast access during calculations and instruction processing. In this article, I’ll explain how processor registers work, which types exist, and why they are essential to processor performance.

What is a bus in computing? It is a system of lines that transfers data, addresses, and control signals between computer components. Like a transport route, it helps the CPU communicate with memory and hardware devices. In this article, I explain what is a bus in computing, how it works, and why it keeps the whole system connected.

What is an offset? It is a value that helps a CPU find data, jump to code, or calculate memory positions. Offsets support memory access, branching, and smooth program execution. In this article, I explain what is an offset, how it fits into the instruction cycle, and why it matters for fetching, decoding, and executing instructions.

The In-/Output Interface connects a computer with its environment. It lets keyboards, screens, storage devices, and other hardware exchange data quickly and reliably. In this article, I explain how the In-/Output Interface works, why it matters, and how it helps devices communicate smoothly with the computer system.

Computer memory is essential because it stores and manages the data every device needs to work. It helps computers access instructions, run programs, and process information efficiently. In this article, I explain what computer memory is, how it works, and why it plays such an important role in system performance and modern computing.

Mnemonics Coding helps programmers write low-level instructions in a more readable way. It connects human logic with machine instructions and assembly language. In this article, I explain what Mnemonics Coding is, how it works, and why it matters for understanding how computers process and execute commands at their core.

RISC vs. CISC explains two different ways processors handle instructions. RISC uses simpler instructions for speed and efficiency. CISC uses more complex instructions to perform more work per command. In this article, I explain RISC vs. CISC in simple terms and show how both designs affect processor performance, complexity, and modern computing.

The Von Neumann architecture changed computing by storing data and instructions in one memory system. This design helps computers fetch, decode, and execute instructions in a clear sequence. In this article, I explain how the Von Neumann architecture works, why it shaped modern computers, and why it still matters for digital technology today.

What is a problem counter? In computer architecture, this phrase points to the program counter, the CPU register that tracks the next instruction to execute. It keeps program flow in order, updates after each step, and helps the processor run instructions smoothly. In this article, I’ll explain what is a problem counter and why it matters for reliable computer operation.

When I first studied computer science, I asked myself: what is a control unit? The control unit manages how a computer processes instructions. It guides data between hardware parts, tells components what to do, and keeps the CPU working in the right order. In this article, I’ll explain what is a control unit, how it works, and why it matters in every computing system.