The different types<span> of </span>databases<span> include operational </span>databases<span>, end-user </span>databases<span>, distributed </span>databases<span>, analytical </span>databases<span>, relational </span>databases<span>, hierarchical </span>databases<span> and </span>database<span> models.
Source Bing</span>
Answer:
B-malware
Explanation:
I do tech and i help work on computars.
<h2>Upgrading and retraining are mandatory to move along with the world.</h2>
Explanation:
Let us understand the term deeply,
Upgrading - Updating yourself with the latest
Retraining - learning new skills
Let me give you a real-life example which is nothing but "mobiles". If you are not updated then:
- you will sit with mobile to make calls and
- do money transactions only by stepping into the bank,
- connect with people only through calls or directly visiting them,
- distance break up the relationship,
- booking tickets in classical way, etc.
These could be done in one touch if you have latest mobile with necessary applications.
In a similar way, we need to get retrained to get to learn new skills, technologies so that we can do our job the best, to be on track, be productive, convert your valuable knowledge in terms of money, to be peaceful in day today transactions, etc.
Answer: Null Object pattern be useful when the absence of an object can be encapsulated by other alternatives which does not have any have any effect.
Explanation:
public interface Rectangle {
double area();
double surfaceare();
boolean isNull();
}
In the code above we have a function for null object. So in the absence of an object we have encapsulated with a method of null which does not do anything. It simplifies the use of dependencies that can be undefined.
In case of collaborator the NULL object pattern makes use of the existing collaboration instead of defining a new one.
It also enable to abstract the handling of null objects from the client so that internal details of the program are not know to outsiders.
you would be shocked, it can even kill you
