If we want to use array then we must use import NUMPY as NP it true or false??

There is no compulsory that we have to import NUMPY as NP in order to use arrays in Python. You can use any name to import the NUMPY package in Python. Below I attached the example that I have done on My computer. Here, I have imported NUMPY as NUM. You can use any name that you like to import NUMPY library. But that name you have to continue for further operations.

NumPy Example

Numpy, Scipy, and matplotlib installation through command

NumPy, SciPy and matplotlib, these three are the packages of the python. Each package has its own benefits to deal with certain data and to do different operations. Follow the instructions below to install these packages 👇👇.

-- First, we have to find the path of the installed directory of the Python tool. The path will be like C:\Users\Accountname\AppData\Local\Programs\Python\Python38-32\Scripts.  
-- After finding the path create notepad in Scripts folder with name local and write cmd in that notepad and change the extension of the file from .txt to .bat. Now, the file name is like "local.bat". 
-- Now, Open this local.bat file. You can see the command window. 
-- To install NumPy, type pip install numpy in command window and press enter button. NumPy package will download and install automatically. 
-- To install SciPy, type pip install scipy in command window and press enter button. SciPy package will download and install automatically.
-- To install matplotlib, type pip install matplotlib in command window and press enter button. NumPy package will download and install automatically.

After the installation of these packages, we can check using the following commands in IDLE(Python).
--- import numpy as np
--- import scipy as sp
--- import matplotlib.pyplot as plt

The installation procedure is successful only when you are not getting any error while running these.

And all the best...👍

no module named 'sklearn' problem while running python code.

This error occurs when there is no 'sklearn' installed package in your system. This problem can be solved by installing this package through the windows command tool. Follow the below instructions to install this package 👇👇--

-- First, we have to find the path of the installed directory of the Python tool. The path will be like C:\Users\Accountname\AppData\Local\Programs\Python\Python38-32\Scripts.  
-- After finding the path create notepad in Scripts folder with name local and write cmd in that notepad and change the extension of the file from .txt to .bat. Now, the file name is like "local.bat". 
-- Now, Open this local.bat file. You can see the command window. 
-- Type pip install sklearn. sklearn package will download and install automatically. 

Now, you can check in IDLE (Python) to confirm this package installed in your system using the following command.

-- from sklearn import datasets.

 This installation is successful only when there is no error while running this command.


 All the best... 👍

Vivo z1pro auto disconnect charging after 100%or not

There is no option like an automatic disconnection after a full charge. But the system will send one popup window that charge is 100% means it is not ready to take any more charge.

My vivo z1pro unfortunately dropped water any problem occur in phone

Officially, for Vivo Z1 pro there is Ingress Protection (IP 67 or 68) rating. IP rating is there for any mobile means it is water-resistant and dust resistant. So, If your mobile (Vivo Z1 Pro) fell in water means there is no guarantee that it will work again properly. It may work if you are lucky enough. 

Experiment frequency response curve of single degree freedom system of vibration....

Single Degree of Freedom System:

               If we are able to determine the system orientation (any position) by a single coordinate then we call it a single degree of freedom system.

Importance of Frequency Response function:
              Frequency Response function (FRF) means how any particular system behaves in terms of magnitude and frequency with respect to any given exciting signal (Excitation signal may be sine, random, chirp, triangle, etc.., ).

             The frequency response function plot gives the modal parameters. For any system, it is necessary to determine the modal parameters. Modal parameters are Natural frequency, Damping ratio, and mode Shape.

For a single degree of freedom system, there will be a single Natural frequency that we can see in the FRF plot. It can be identified by the peak response in the plot. From the FRF, we have to determine the damping ratio using a 3 dB method or half-power bandwidth method.

not getting calls while playing games in vivo z1pro Mobile

Go to systems settings  --->  then, Open Ultra game Mode ---->   Click on Reject button...

there we can see.... toggle button (Switch on/off button)...

If you switch on it... It will reject all the calls while playing games... If you switch it off, You can get calls while playing games also...