This post is the selection of short YouTube tech videos:

1. 8 Key Data Structures That Power Modern Databases

Data structures are an essential part of software engineering, providing a means of organizing and manipulating data in memory. They are used to store and manage data in an efficient and organized manner, enabling efficient access, insertion, deletion, and search operations. Choosing the appropriate data structure for a given task is an important decision for a software engineer, as it can have a significant impact on the performance and memory usage of the application. For example, a hash table may be a good choice for fast lookup operations, while a linked list may be more suitable for frequent insertions and deletions.
Understanding data structures and their properties is an important skill for software engineers, as it can help them design and implement efficient and scalable applications.

2. CAP Theorem Simplified

CAP theorem is a fundamental concept in distributed systems that states that it is impossible for a distributed system to simultaneously provide all three of the following guarantees: consistency, availability, and partition tolerance.
Consistency refers to the requirement that all nodes in a distributed system see the same data at the same time. Availability refers to the requirement that a request made to the system must receive a response, regardless of the state of the system. Partition tolerance refers to the ability of the system to continue operating in the presence of network failures or partitioning.
Understanding CAP theorem is important for software engineers designing and implementing distributed systems, as it can help them make informed trade-offs between consistency, availability, and partition tolerance based on the specific needs of their application.

3. What is OSI Model

The OSI (Open Systems Interconnection) model is a conceptual framework that describes how communication protocols interact in a networked system. It is divided into seven layers, each representing a different aspect of network communication.
The OSI model serves as a conceptual framework for understanding network communication, allowing engineers to design and implement communication protocols that are interoperable across different systems. It is a useful tool for troubleshooting network issues and understanding how different protocols work together to provide end-to-end communication.

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