Essential Computer Terms: Hardware and Software Basics
Computer
An electronic machine built to process information and data with programs designed for it. It is a device capable of receiving data, processing it, and delivering results in a desired way. It consists of two inseparable elements: the electromechanical equipment (hardware) and the instructions in the form of programs (software) to perform different tasks using algorithms.
Bit (Binary Digit)
The minimum unit of digital information that can be treated by a computer. It is a 1 or a 0.
Byte
A unit
Understanding Computers: Types, Components, and Peripherals
A computer is an electronic device that manipulates information or data. It can store, retrieve, and process data. You can also type documents, send emails, play games, browse the web, and edit or create spreadsheets, presentations, and videos.
Hardware and Software
Hardware is any part of your computer that has a physical structure, such as the keyboard, mouse, or internal parts. Software is any set of instructions that tells the hardware what to do and how to do it, such as web browsers, games,
Read MoreComputer Beep Codes: Troubleshooting Hardware Issues
When your computer encounters a hardware problem during startup, it often communicates the issue through a series of beeps. Here’s a breakdown of common beep codes and their potential causes:
-
No tone. No turn on.
Error Message: None.
Description: Possible power supply failure. Check the power supply unit.
-
Continuous tone.
Error Message: None.
Description: Power supply failure.
-
Constant beeps.
Error Message: None.
Description: Defective motherboard.
-
Rapid constant beeps.
Error Message: May not see any message
Key Concepts in Operating Systems: Memory, Processes, and Programs
Dynamic Partitioning: An Example
A hole of 64K is left after loading 3 processes: not enough room for another process.
Eventually, each process is blocked. The OS swaps out process 2 to bring in process 4.
Another hole of 96K is created.
Eventually, each process is blocked. The OS swaps out process 1 to bring in process 2 again, and another hole of 96K is created…
Compaction would produce a single hole of 256K.
Difference Between Fixed and Dynamic Partitioning
Fixed Partitioning
- Partitions main memory
Database Objectives and Architecture: A Comprehensive Look
Objectives of a Database
- Data Independence: Ensuring independence between data and the applications that use them. This includes:
- Physical Independence: The ability to modify the physical schema without affecting the higher levels.
- Logical Independence: Changes to the conceptual schema do not necessitate modifications to application programs.
- Minimal Data Redundancy: Minimizing unnecessarily repeated data to avoid inconsistencies. Providing mechanisms to monitor operations on the database.
- Versatility
Understanding Access Control in C++ Inheritance
Protected Members
A protected member is inaccessible to all clients at all levels. If a protected data member is inherited, it is not accessible to the clients of this derived class, no matter what the access control is.
Protected items are things you need to write your functions, but you do not want any client to know about. For example, ListError.
Example
class base
- private a // base’s client cannot use; cannot be passed down either
- protected b // base’s client cannot use; can be passed down
- public c