Raymond Wouapi

Hi,

Please I wanted to know whether there is any different between the cracker and the hacker.


Thanks,
Raymond.

Hi,

In the domain of cybersecurity, I always hear about this concept of white and red hat. Please I wanted to know the differences betwwen these two individuals.

Thanks,
Raymond.

This actually sounds interesting. Here we go let get our brains out of the boxes.

Erlang, a functional language
A cat programming though
Oh! what a cat

Programming cat watching
While, I program in Erlang
Oh! Erlang what a language

Oh! functional cat programming
cause me program in Erlang though
Dublin is my destination

Hi,

I will like to know what is the mechanism of OAuth 2.0 as applied to software security.

Thanks.

Hey Sam,

Please I wanted to know what is the main advantage or reason of going in for microservices in the development process?

Thanks in advance.

Hi Sam,

Excuse me but I'm a little confuse about the subject of microservice. I wanted to know if a microservice is a design pattern or an architectural pattern?

Thanks for your comprehension.

Hello Java Guru,

Just to let you know that I just cleared the OCP stuff with 86%. This is a result of a long preparation of One and a half month. Basically I used the ebook of Bert and Kathy. Indeed from my experience this is the best book to use so as to clear this exam with flying grades. So for that, I want to take this time out to sincerely thank them for the tremendous work that they did in this book. As per my experience, every questions that I had came from this ebook and besides, some of them were even the exact copy of what is in the book in the section self test. In addition to that, the simulator of this book that comes along as part of the free downloadable content is one of the best that I used. I also use Whizlabs and enthuware but I have a better experience with the simulator of the ebook of Bert and Kathy.

So my advice for those who are going in for this exam is that, you should used all these 3 simulators but the best of all is the one offered by Bert and Kathy.

So good luck for your exam and still then, happy coding.

Hi Shantanu,

Thanks very much. I appreciate the concerned.

Here is the entire question with all its propositions:
Given:
public class F {
private static final F f = new F();
public static F c() {
return f;
}
public void update(F a) { }
public void delete(F a) { }
}

Which design pattern or principle is implemented?
A. Coupling
B. DAO
C. Factory
D. IS-A
E. Object composition
F. Singleton

Here is the answer that was given with its explanations.

☑ F is correct. The singleton pattern is identifiable by the static variable for the single
instance and the accessor returning it.
☐✗ B is incorrect because there is no interface. The class just happens to have methods
update() and delete() , which are similar to those found in a DAO. A, C, D, and E are
incorrect because of the above. (OCP Objective 3.5)

Hi Anayonkar,

Oh thanks for the clarification, I appreciate so much but nevertheless does that means that the answer given for this question in the ebook is a mistake?

Hello Java Guru,

After reading the topic Advanced OO and Design Patterns of the ebook oca-ocp-se-7-programmer 1 and 2. I went in for self questions but I had a problem with question 3 in page 567. Basically the question goes thus:
Given:
public class F {
private static final F f = new F();
public static F c() {
return f;
}
public void update(F a) { }
public void delete(F a) { }
}

Which design pattern or principle is implemented?

And the answer that was given as feedback is that this question implements the singleton design pattern.

As per my understanding for a class to implement a Singleton, 3 conditions are mandatory. Which are:

■ A private static variable to store the single instance called the singleton. This
variable is usually final to keep developers from accidentally changing it.
■ A public static method for callers to get a reference to the instance.
■ A private constructor so no callers can instantiate the object directly

I noticed that the class respect the first 2 conditions but not the last condition.

Why is the answer given as Singleton design pattern?

Besides, I also wanted to know if a Singleton design pattern implements the Object composition principles? Because in class we still have a field member as instance of the class.

Thanks for your response!

Hi Shivalkar,

Thanks for the clarification. I appreciate the promptnees of the response. Thanks so much.

Hello Java guru,

I'm actaully preparing myself for the OCPJP 7 and I have come across two tools for evalauting my level which are whizlabs and enthuware. Besides, I noticed that the way these tools evalaute their tests is not the same. That is whizlab give you the benefits of doubts (if a question has 2 correct answers and you choice one correct answer and one wrong, whizlabs is going to give you half mark for that question) but enthuware is mostly concerned with precision that is for a question that requires 2 answers failing one choice will be consider as a failing the whole question. So my questions go thus:

First thing first which is best tool amongst these tools to be able to clear this exam with flying grades?

Secondly, how does the actaul exam evalautes, is it with the enthuware standard or the whizlab standard? Or does it has another way of evalauting?

Thanks for your responce.