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olya-2409 [2.1K]
3 years ago
14

What is the database and presentation for files​

Computers and Technology
2 answers:
Nutka1998 [239]3 years ago
6 0

Answer:

Database Management System ppt DBMS

I don't know if that is right. Sorry if it's not.

Talja [164]3 years ago
6 0

what is the database and presentation for files

File - a group of related records. ... A database consolidates records previously stored in separate files into a common pool of data records that provides data for many applications. The data is managed by systems software called database management systems (DBMS).

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Write any four common hardware devices​
marishachu [46]

Answer:

Input devices: For raw data input.

Processing devices: To process raw data instructions into information.

Output devices: To disseminate data and information.

Storage devices: For data and information retention.

8 0
3 years ago
16 POINTS
Nostrana [21]
It think it's a Nested List.
Im so sorry if this is wrong
6 0
3 years ago
Write a program that asks the user to enter a series of numbers separated by commas. Here is an example of valid input: 7,9,10,2
alex41 [277]

Answer:

Here is the JAVA program. Let me know if you need the program in some other programming language.

import java.util.Scanner; // used for taking input from user

public class Main{ //Main class

public static void main(String[] args) {//start of main() function body

  Scanner scan = new Scanner(System.in); // creates a Scanner type object

   String input; // stores input series

    int sum = 0; //stores the sum of the series

    System.out.println("Enter a series of numbers separated by commas: "); //prompts user to enter a series of numbers separated by comma

     input = scan.nextLine(); //reads entire input series

     String[] numbers = input.split("[, ]"); //breaks the input series based on delimiter i.e. comma and stores the split sub strings (numbers) into the numbers array

   for (int i = 0; i < numbers.length; i++) { //loops through each element of numbers array until the length of the numbers reaches

          sum += Integer.parseInt(numbers[i]); } // parses the each String element of numbers array as a signed decimal integer object and takes the sum of all the integer objects

     System.out.println("Sum of all the numbers: " + sum);  } } //displays the sum of all the numbers

Explanation:

The program prompts the user to enter a series separated by commas.

Then split() method is used to split or break the series of numbers which are in String form, into sub strings based on comma (,) . This means the series is split into separate numbers. These are stored in numbers[] array.

Next the for loop iterate through each sub string i.e. each number of the series, converts each String type decimal number to integer using Integer.parseInt and computes the sum of all these integers. The last print statement displays the sum of all numbers in series.  

If the input is 7,9,10,2,18,6

Then the output is: 7+9+10+2+18+6

sum = 52

The program and its output is attached.

8 0
3 years ago
You decide to store data in the user's browser in order to reduce the amount of data that must be downloaded. What is this proce
Lemur [1.5K]

Answer:

client-side storage

Explanation:

The process of doing this is known as client-side storage. Like the name suggests this saves data that is sent to the user's computer on that computer either as cookies or cached data. This data is then used every time that the user decides to enter the same website or access the same program from the browser. Doing this allows these websites and programs to load much faster the more times that the user decides to enter them.

5 0
3 years ago
The relational algebra expressions can be rearranged and achieve the same result but with a better processing time. A selection
BigorU [14]

Answer:

c. This would reduce the number of tuples to involve in the join resulting in a more efficient query.

Explanation:

SQL or structured query language is a database querying language used to communicate or interact with databases. A database query could be as simple as returning all the columns from a database table to complex like joining several query results which in turn forms an algebra expression.

Every query statement or expression is executed with time, execution time needs to be minimized for efficiency, so, a well-arranged and reduced joining in the query improves the efficiency of the query.

8 0
3 years ago
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