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Levart [38]
3 years ago
12

Why backup system of data and software is necessary. ​

Computers and Technology
1 answer:
zavuch27 [327]3 years ago
7 0

Answer:

The purpose of the backup is to create a copy of data that can be recovered in the event of a primary data failure. Primary data failures can be the result of hardware or software failure, data corruption, or a human-caused event, such as a malicious attack (virus or malware), or accidental deletion of data.

You might be interested in
In the SDLC's third phase, the way in which a proposed information system will deliver the general abilities described in the pr
kifflom [539]

Answer: Detailed

Explanation:

SDLC consist of 7 phases. They are:

1. Planning.

2. System analysis and requirement

3. Design:

4. Coding:

5. Testing:

6. Installation

7. Maintenance

Here we are talking of the third phase. In this phase it is the design phase which consist of high and low level design. Here the preliminary design is included in high level design where it describes the required hardware, software, network capabilities and the modelling of the interface. However the detailed design in low level design will implement the coding and will finding of any errors in the implemented design as described by the preliminary design.

3 0
3 years ago
To print the last element in the array named ar, you can write :A. System.out.println(ar.length);
timofeeve [1]

Answer:

Option (d) is the correct answer.

Explanation:

An Array is used to store multiple variables in the memory in the continuous memory allocation on which starting index value is starting from 0 and the last index value location is size-1.

In java programming language the array.length is used to tells the size of the array so when the user wants to get the value of the last element, he needs to print the value of (array.length-1) location so the correct statement for the java programming language is to print the last element in the array named ar is--

System.out.println(ar[ar.length-1]);

No option provides the above statement, so option d (None of these) is correct while the reason behind the other option is not correct is as follows--

  • Option a will prints the size of the array.
  • Option b also gives the error because length is an undeclared variable.
  • Option c will give the error of array bound of an exception because it begs the value of the size+1 element of the array.
3 0
3 years ago
In what year was the earliest documented use of the word computer?.
topjm [15]

Answer:

1946

First, to deal with the more recent and most familiar meaning of the word ‘computer’: the word first came to mean an electronic device used to store and communicate information (and all of its subsequent functions) only in the 1940s: the earliest citation in the Oxford English Dictionary is from 1946. This is fitting.

Explanation:

7 0
2 years ago
If you want to copy data from one cel to another cell that is several rows down in a worksheet, which method should you use?
bogdanovich [222]

copy and paste

so you can keep the data in the current cell and add it to other cells that you want that data in as well

5 0
3 years ago
Mix ‘em Let s1 and s2 be 2 c-strings of the same length. Write a function char* mixem(char*s1, char* s2) which returns a c-strin
Shkiper50 [21]

Answer:

See Explaination

Explanation:

#include <iostream>

#include <string.h>

using namespace std;

char *mixem(char *s1, char *s2);

int main() {

cout << mixem("abc", "123") << endl;

cout << mixem("def", "456") << endl;

return 0;

}

char *mixem(char *s1, char *s2) {

char *result = new char[1 + strlen(s1) + strlen(s2)];

char *p1 = s1;

char *p2 = s2;

char *p = result;

while (*p1 || *p2) {

if (*p1) {

*p = *p1;

p1++;

p++;

}

if (*p2) {

*p = *p2;

p2++;

p++;

}

}

*p = '\0';

return result;

}

5 0
3 years ago
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