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polet [3.4K]
3 years ago
7

Explain the security mechanisms available for a database and how the data will be protected.

Computers and Technology
1 answer:
Stolb23 [73]3 years ago
8 0

Answer: Views, unauthorized access, encryption are some of the security mechanisms.

Explanation:

The database of any application or software contains all the important data, therefore it is utmost necessary to protect the data from falling into dangerous hands. Most databases use authentication measures in form of passwords or bio metrics to avail access. Besides these users can use views to see the data but cannot change anything into the database. Some databases also use encryption systems to encrypt the passwords for better safety. There are some databases which grants user with two types of privileges such as system and  object privileges, whereby with system privileges one can change the system environment variables.

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In a relational database, the three basic operations used to develop useful sets of data are:_________.
olga_2 [115]

In a relational database, the three basic operations used to develop useful sets of data are:

\sf\purple{a.\: Select, \:project,\: and\: join. }

\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}

6 0
3 years ago
Write a program named ArrayDemo that stores an array of 10 integers. (Note that the array is created for you and does not need t
romanna [79]

Answer:

Hi Zoom! Good question. This is particularly useful for learning sorting functions in arrays and user input handling as well. Please find the implementation below.

Explanation:

I have implemented the code in Python 2+. You can save the below code into a file called ArrayDemo.py and then run it from the command line with the command "python ArrayDemo.py". I have declared the demo_array in the code to an array of 10 unsorted integer values to test this. You can change the code if needed to have this array input by user as well and it should work fine.

Note: if you're using Python 3+ then you'll need to change the "raw_input" in the code to just "input" to make it work.

ArrayDemo.py

demo_array = [2,1,3,4,5,7,6,8,10,9]

option = 0

while (option != 4):

 option = raw_input("Enter 1 to view list in ascending order, 2 to view list in descending order, 3 to choose specific poisition to view, 4 to quit the application: ")

 try:

   option = int(option)

   if option == 1:

     sort_by = 'asc'

     print(sorted(demo_array, reverse=False))

   elif option == 2:

     sort_by = 'desc'

     print(sorted(demo_array, reverse=True))

   elif option == 3:

     position = raw_input("Enter specific position to view (0-9): ")

     try:

       position = int(position)

       if position < 0 or position > 9:

         print("Position does not exist")

       else:

         print(demo_array[position])

     except ValueError:

       print("Position does not exist!")

   elif option == 4:

     break

   else:

     break

 except ValueError:

   print("Invalid input!")

5 0
3 years ago
Help! Computer Science Discoveries. Hurry its timed
VLD [36.1K]

Answer:

1. categories

2. character

3. code

4. portrait

5. conversation

6. stage

7. Landscape

8. backdrop

Explanation:

I'm not sure what "a visual programming language for children" would be, sorry about that, and sorry if these are wrong .-

7 0
3 years ago
What are the differences between tkinter toolkit and PyQt?
lesantik [10]

Answer:

See the explanation  

Explanation:

tkinter toolkit                                            

  • Easy to use
  • Easy to learn
  • Easy to debug
  • Good for simple tasks
  • TkInter applications are simpler as compared to PyQt because it is included in standard Python distribution.
  • Faster than PyQt.
  • Does not have advanced widgets.
  • No interface builder available.
  • Free for commercial utilization.

PyQt

  • More flexible in terms of coding.
  • Harder to debug as compared to tkinter
  • GUI is clearer in display than tkinter
  • Widgets are more interactive than that of tkinter
  • size of a PyQt program is larger than that of tkinter
  • uses a variety of paltform APIs and gives primary access to these APIs through a unique API.
  • Has an interface builder that allows to design interfaces without writing any code.
  • Has modern widgets.
  • Due to its vast interface and several UI components it is a bit confusing to learn as compared to tkinter.
  • Commercial license is required to release the code.
  • Cross-platform and native GUI.

Widgets are GUI components such as buttons, labels, menus.

a) Label

This is a tkinter widget to show the text or image on the screen. It looks like a display box. The user can easily edit or update label.

For example to display a label with text "Hello World" the following chunk of code is used:

import tkinter

widget = tkinter.Tk()

label =tkinter.Label(widget, text="Hello World")

label.pack()

tkinter.mainloop()

b) Entry

This is a tkinter widget to accept the text input from user. For example if you want to get a single line text from user then you can use Entry widget. The code below displays an entry widget with the message: Enter input text: Here the user can input the text.

import tkinter

widget = tkinter.Tk()

entry = tkinter.Entry(widget)

entry.insert(0, "Enter input text:")

entry.pack()

tkinter.mainloop()

c) Button

This is a tkinter widget to add a button in an application. You can enter some text or an image in this button convey its purpose. When you click on the button a function is called or an event is emitted.

The following chunk of code displays a button with the text "Click Me" on the button.

import tkinter

widget = tkinter.Tk()

button = tkinter.Button(widget, text="Click Me")

button.pack()

tkinter.mainloop()

d) Frame

This is a tkinter widget to group together and organize other widgets and arranges their position.

The following chunk of code displays an outer frame with a label with text "parent label" and an inner frame with a label of text "child frame".

import tkinter

widget = tkinter.Tk()

frame = tkinter.LabelFrame(widget,text="parent frame")  

label= tkinter.Label(frame,text="child frame")

frame.pack(padx=10, pady=10)

label.pack()

tkinter.mainloop()

5 0
4 years ago
Use the nutrition label to determine how many calories would be consumed by drinking 1 liter of Mountain Dew.
Rus_ich [418]
1 liter of mountain dew is 170 calories
4 0
3 years ago
Read 2 more answers
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