General Computer Science Information

7 flashcards · Computer Science · by danielemiller

1. What is a data model?

   A data model is a conceptual representation of data and its relationships. It provides a framework for organizing and structuring data in a way that allows for efficient storage, retrieval, and manipulation.

2. What are the common types of data models?

   Relational models: which organize data into tables with columns and rows, and establish relationships between them using keys. Hierarchical models: which organize data into a tree-like structure with parent and child nodes. Network models: which organize data into a network of interconnected nodes. Object-oriented models: which represent data as a collection of objects with properties and methods.

3. What is data modeling?

   Data modeling is the process of identifying the entities, attributes, and relationships of the data being stored, and using this information to create a schema that outlines the structure of the database and how data is organized within it.

4. What is encapsulation in programming?

   Encapsulation is the concept of hiding the implementation details of an object or function from the outside world. In the context of file organization, encapsulation refers to the idea that the contents of a file are invisible to other files, except for what you choose to expose via module exports or other means. Encapsulation helps prevent naming conflicts and makes it easier to organize and manage code in a modular way. The specifics of how encapsulation is implemented can vary depending on t…

5. What is a Factory Reset Runtime?

   A Factory Reset Runtime is a process that deletes all files and packages on a Google Colab virtual machine, and restores it to its original state. This can be useful for resolving certain issues and starting fresh.

6. Why is "Restart runtime" the recommended option to resolve the "chdir(2) failed.: No such file or directory [disconnected]" error in Google Colab

   Restarting the runtime in Google Colab can help resolve various issues including the "chdir(2) failed.: No such file or directory [disconnected]" error. This is because restarting the runtime can help clear out any memory or system issues that might be causing the error, and provide a fresh start for your Colab notebook.

7. What is "clearing" a memory leak?

   Clearing a memory leak involves finding and fixing the cause of the leak in the code, rather than simply freeing up the memory that is being leaked. This involves identifying the root cause of the leak and making changes to the code to ensure that the leak does not occur in the first place. Once the root cause has been addressed, the memory that was being leaked can be reclaimed and the application can continue running without issue.