Data & Algorithms (Data Storage & Important of Data & its applications)

 Data Storage :

1. Data storage means that files and documents are recorder digitally and saved in a stored system for future use.
  
2. Storage systems may rely on electromagnetic, optical or other media preserve and restore the data if needed.

3. Data storage makes it easy to back up files for safekeeping and quick recovery in the event of an unexpected computing crash or cyber attack. 

4. Data storage can occur on physical hard drives, disk drives, USB drives or virtually in the cloud.

Types of Data Storage :

1. Direct Attached Storage (DAS):

i. Direct attached storage (DAS) includes types of data storage that

are physically connected to the computer. 

ii. This storage is generally accessible to only a single machine. Some common devices in this category include:
1. Hard Drives
2. CD/DVD Drives
3. Flash Drives

iii. DAS solutions are great for creating local backups and can be
more affordable than NAS solutions, but sharing data between
machines can be cumbersome.

2. Network Attached Storage (NAS):

i. Network attached storage (NAS) allows for multiple machines to
share storage over a network. This is accomplished with multiple hard drives or other storage devices in a RAID configuration.

ii. The key benefits of NAS is the ability to centralize data and improve collaboration. 

iii. Data can be easily shared among connected machines, and
permission levels can be set to control access. 

iv. While NAS solutions tend to be more costly than DAS solutions, they are still very affordable as storage technology has advanced
significantly.

Q. Why is Data Important ?

1. Data provides a deeper understanding of  your market.

2. Data collection improves your consumer database.
3. Consumer data improves your marketing strategies.
4. It allows for greater personalization.

Ans. Importance of data :-

1. Data provides a deeper understanding of your market.

Data Acquisition :

1. Data acquisition is the process of measuring physical world conditions and phenomena such as electricity, sound, temperature and pressure. 

2.  This is done through the use of various sensors which sample the environment's analog signals and transform them to digital signals using an analog-to-digital converter.

3. The resulting digital numeric values can then be directly manipulated by a computer, allowing for the analysis, storage and presentation of these data.

Types of Data Acquisition Systems:

1. Analog Data Acquisition Systems:  

The data acquisition systems, which can be operated with analog signals, are known as analog data acquisition systems. Following are the blocks of analog data acquisition systems.

i. Transducer :  It converts physical quantities into electrical signals.

ii. Signal conditioner :  It performs the functions like amplification and selection of desired portion of the signal. 

iii. Display device :  It displays the input signals for monitoring purpose.

 iv. Graphic recording instruments :  These can be used to make the record of input data permanently.

 v. Magnetic tape instrumentation : It is used for acquiring, storing and reproducing input data.

2. Digital Data Acquisition Systems: 

a. The data acquisition systems, which can be operated with digital signals, are known as digital data acquisition systems. They use a digital components for storing or displaying the information.

b. The following operations take place in digital data acquisition:

i.  Acquisition of analog signals

ii. Conversion of analog signals into digital signals or digital data

iii. Processing of digital signals  or digital data.

C. Following are the block of digital data acquisition systems :-

i. Transducer : It converts physical quantities into electrical signals.

ii. Signal Conditioner : It performs the functions like amplification and selection of desired portion of the signal.

iii. Multiplexer : Connects one of the multiple inputs to output. So, it acts as parallel to series converters.

iv. Analog to Digital Converters :  It converts the analog input into its equivalent digital output.

v. Display Recorder : It is used to record the data in digital format.

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