Answer:
Explanation:
1. The answer is No, interface cannot have constructors. ... In order to call any method we need an object since there is no need to have object of interface, there is no need of having constructor in interface (Constructor is being called during creation of object).
2.A final class is considered complete and can not be subclassed (It's methods can not be overridden ). In case of abstract class, we have to proved implementation to abstract methods in subclasses. A final class can not have abstract methods and an abstract class can not be declared final.
3.private constructors are acceptable, however the class should be marked final instead, as doing so means the class is to be extended.
4.Yes! Abstract classes can have constructors! Yes, when we define a class to be an Abstract Class it cannot be instantiated(i.e an object cannot be created) but that does not mean an Abstract class cannot have a constructor. Each abstract class must have a concrete subclass which will implement the abstract methods of that abstract class.
<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:
highly venerable to external attacks
Explanation:
Embedded systems are the type of computer systems that are specially designed having hardware and software components plus programmable capabilities embedded into the hardware itself.
These computer systems are motorized by dedicated computer hardware chips made by companies such as Broadcom, Qualcomm, and Marvell. These chips are cheap which also means that they’re highly vulnerable, and the profit margins slim. They normally put a version of the Linux operating system onto the chips, lumping it up with some other bunch of open-source and proprietary components and drivers. With little or no technical engineering work before shipping, and there's little enticement to update their "board support package" until there’s probably a very good reason for it.
It promotes problem solving approaches and thinking skills
