Vikrama Sanjeeva

Hi Pete,

Thank you for your detailed response. It's really helpful.

1) Could you please provide the Amazon link for the 2nd edition of the book?

2) My plan is to write first OCA, then OCP and finally Spring certification. What do you reckon for this path? Which spring certification is popular and accepted in the industry? I might be asking too much here, but I want to ensure that I know where I'm going, and it is the right direction.

Thanks.
Viki

Thanks Pete for your responses.

I contacted OCP Support with my SCJP 1.2 transcript and they've given below response:

-------------------
Dear Viki

Thank you for writing back to us.

We see that you have earned the credential Sun Certified Programmer for the Java 2 Platform on 5-JAN-2002 under testing id SP9865371.

Kindly note as you have already passed the exam Sun Certified Programmer for the Java 2 Platform hence you need to pass only one upgrade exam 1Z0- 813 to earn the credential Oracle Certified Professional, Java SE 8 Programmer

Kindly visit for more details at : https://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=654&get_params=p_id:357&p_org_id=1001&lang=US#tabs-2-1

We appreciate your understanding in this

Sincerely,

OCP Team
----------------------

From their response, it's clear I can go directly to exam 1Z0- 813. However, after discussing with you (as my gap is much) I'm planning to for OCA 808 and then OCP 809 exams. This might be the long route and expensive as well (as I've to pay two separate exams) but I think it will help me to slowly digest the new concepts in Java and also will help me to regain my confidence.

Having said that, I think (after my research here on forums), I need below two resources to start preparing for OCA 808:

a) OCA: Oracle Certified Associate Java SE 8 Programmer I Study Guide: Exam 1Z0-808 1st Edition
b) Ethuware tests

I just need your review on above to ensure I'm on the right path. This will help me to start my preparation.

Thanks,
Viki

Hi Pete,

Thanks for your response.

So you mean I've two options?

1) Either to go for OCA 808 and then OCP 809 or
2) Go for the upgrade exam 813

Both of the above paths will lend me to OCP for Java 8 Programmer?

Pete Letkeman wrote:For this path I suggest that you try directly for the Java OCA 808 exam and then the Java OCP 809 exam.
I suggest that you take a few moments and read some of the stories found here https://coderanch.com/wiki/659980/Ocajp-Wall-Fame.
By over over these stories you can see how others prepared and what material they used.
This could save you time, money and frustration.

Hi Pete,

Thanks for your response.

Could you please share the rationale behind taking Java OCA 808 exam first and then the Java OCP 809 exam? Is it mandatory? And does my SCJP 2 certification is not acceptable to take OCP 809 exam?

Thanks,
Viki.

Hi,

I'm out of programming from last 6+ years and during all this time I was working as a Business / System Analyst, focusing more on business requirements and related documentation.

However, I'm now planning to move back to back-end programming.

The last version I used was JDK 4 with Struts 2.

I notice nowadays Java 8 with Springs are heavily used in the software development industry.

Therefore, I'm planning to upgrade my knowledge of Java 8 and Springs modules.

I've done some tutorials on Springs framework but I feel more confident on the subject by writing exams. Programming small code snippets and learning new concepts for the exam is what works well in my case.


Having said that, what is the recommended path if I want to go for Java 8 and Springs certification? I mean the books, mock exams, and the time required to prepare.

Any help would be highly appreciated.

Thanks.
Viki.

I understand that GA performs analytics and stores analytics data in google analytics storage. I'm not sure of it's length, but as I remember, it can store for longer time may be 2+ years. I've integrated GA with one corporate portal back in 2010. It worked wonders, without a doubt.

What I'm worried is user data and app data. Which I will store in MongoDB. So if some analytics has to perform on this data, then I don't think GA will come in handy here. After your advise (of not using Hadoop unnecessarily until required), I think I've to use R Studio to write our own custom data analysis algorithms. I'm not familiar with R, but it's is one of the language in my research road-map to master upon. Please suggest, how you see things in this case? That is, performing analytics on user data and app data to make value out of the collected data which in turn will help business to make future decisions. I'm not experienced with R, but of you can suggest something simple here using R then it would be great for me and my app.

Many thanks.

Viki

Wonderful !!

I completely agree with the rational behind your advise.

Just few things:

You said, GA provides end to end pipeline for free. I tried to look into free storage but only free storage I found in 15GB google drive. May be I'm missing something here? Could you please provide some starting links to this end to end service for free which includes all 5 services you mentioned (data collection storage, transfer, processing, visualization) ??

Secondly, just for info, we do have Hadoop cluster setup as part of uni project, which the management encouraged me to use instead of going for paid online services (actually initially I proposed Firebase, but they (the management) is not willing to pay continuously for Firebase service in future, that's why asked me to the already made Hadoop cluster).

Rest, I really appreciate yours ideas of learning the echo-system side by side on non-critical prototype, gathering data with GA and setting up a business culture for taking necessary decisions based on the collected information. This is indeed very piratical advise, as well as using Hadoop when really required.

Also thank you very much for raising the JDBC compliance issue of MongoDB !!

Many thanks.

Viki.

chris webster wrote:Hadoop is all about distributing your data and your processing across multiple cheap machines. The data is replicated so there are e.g. 3 copies of each block of data, with diifferent copies on different machines. If you have more nodes than replicas, e.g. 3 replicas across 6 nodes, then on average each node only contains half the total original data volume. Hadoop knows where your data is replicated, so it can decide to process different subsets of your data on different nodes at the same time. This is how Hadoop allows you to exploit the power of distributed processing.

If you only have two nodes, and your replication factor is 2 or more, then each node contains all your data anyway, so Hadoop cannot decide how to break up the processing in this way. And if you only have one node, then nothing is distributed at all.

The first case you mentioned i.e of 3 replicas across 6 nodes, you mentioned Hadoop can decide what to process where.

Whereas, in your last example, i.e two nodes with replication factor is 2 or more, in this case you said, Hadoop cannot decide how to breakup processing.

My question, why in 2nd case, Hadoop cannot decide ? If both nodes are deployed on two separate machines, and one machine is loaded and not have good resources as compare to the other, then don't you think YARN will select the second machine to process the task ?

Thanks.

Viki.

Hi,

I'm here to take a expert advise on using Hadoop or not for my situation/case.

Brief intro: I'm a masters by research student doing research in BigData area which I wish to explore more by continuing into PhD.

We've a side project in its inception phase (not related to my research) for developing mobile app using Ionic framework. One of the non-functional requirement of the project is to collect various analytics, for example, how many times apps downloaded, visited, which feature is used more, which user uses what etc etc. As a part of proposed solution, we've proposed to use Google Analytics to capture the required analytics and MangoDB for storing user's data.

I believe these statistics can be easily captured by GA. However, recently, I was thinking to use Hadoop and its related technologies (Hive, Impala, Sqoop etc) for doing analytics work. Why ? Because this way, I will get a chance to work on Hadoop echo-system which will be a good compliment with my Master's research which is in BigData.

What I know that Hadoop is mainly used where we have really BigData (in TBs or more) in a variety of format (unstructured, semi-structured) and where value out of data is needed by performing analytics.

My question is, we will not have much data in mobile app, but we do have data analytics work in app. So does it make sense (reasonable?) to export data from MangoDB into HDFS and use Hive or Impala for doing analytics ?

Please give feedback. Your expert advise is highly appreciated.

Many thanks.

Viki.

Hi,

In my case; System B is completely a separate System. Actually, we own System A which provides payment services by publishing required Web Services. Whereas other systems (B1,B2,Bn) integrates with System A in order to make payments.

After above replies, I am concluding that System B can be shown as (Primary) Actor as it will be the one who will be initiating interaction (s) with System A.

Bye
Viki

Somebody can help here ?

Hi,

In my case; my system (A) is publishing a web service which another system (B) invokes to make payment. There is a series of interactions between A and B where A fullfill demands/needs of B by providing required services.

My question here: Whether system B can be shown as ACTOR in Use Case ?

Bye
Viki

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Bye
Viki

Hi all,

There is an app A, providing an interface for payment processing to all those apps (B1, B2, ...) connecting to it. Means app A takes payment details as an input from B1, B2 etc and passes this input to a payment processor.

App A will publish its services via various modes (WS, JMS, Sockets etc) so that B1,B2 has multiple ways to connect app A.

I want to assure:

2-Way communication between A and B1,B2 etc is secure and confidential

Both A and B1,B2 has assurity that they are communicating to the right partner. Means, in case, if someone forge the IP of B1,B2 then A must know that its not communicating with the right person.

Both A and B1,B2 etc belongs to same intranet but different network segments. Probably, A will be on separate box and behind firewall.

Kindly advise what are the methods available to assure above two points


Bye,
Viki

Dear karas,

Not 100%, but I can understand the pain you are going through as it happened to me as well. But may be not to the same extent as you are having. I tried myself to cope up with the problem and for this I tried to ignore the "bads" which were causing disorder AND to focus (concentrate) on my job/task. This really worked because I was having a big and urgent responsibility in executing project. At that time I thought either I keep reminding myself with the "BADs" and "DO BADS" in my job OR forget/ignore the "PREVIOUS BADS" and "FOCUS/CONCENTRATE" on job/task. I selected 2nd option i.e. to ignore as much as possible. Of course its not a one-day job, but one has to keep practicing it until he really achieve his job/responsibility/company targets.

You should be thankful to God that you have job in hands and that you were having hand-on skills with the responsibilities you are assigned. Take this benefit as a +ve side of your situation and try to utilize it in order to get back to life and to cope with memory loss problem. You can try ball games like table-tennis in which your whole concentration is on-the-ball for some good time. You can try to play checkers to get the feeling of "focus/concentration". In my opinion the better you have focus/concentration the more you can cope with memory loss issue.

take care and Good Luck

Bye,
Viki.