[AWS] How to tackle with the AWS Certified Developer Associate Level?

I attended the AWS Certified Developer – Associate exam on 4th March 2016, and eventually got this certification. I would like to tell you what the AWS Certified Developer – Associate is, and how I prepared for the examination.

What is AWS Certified Developer – Associate?

AWS Certified Developer – Associate is one of the AWS Certifications. AWS offers three categories of certification: Solutions Architect, SysOps Administrator and Developer. Each of these is currently available on an Associate or Professional level. Right now, there are five exams in total, since one exam covers both the Developer and SysOps Administrator on the Professional Level.

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Ride to Mayhoman & Rae era 花園 & 天湖部落約騎

日本車友Kato san來新竹”包餃子”,在地的我們自然要約騎一下,順便把沉睡中的”老大們”叫出來騎一下。Kato san滿想去騎宇老,但體念到老大幫殘腿居多元旦才騎過 (我們爬不起來改騎大山背 XD),馬幫主只好開出花園-天湖部落一圈的輕鬆行程 (不到80 km)。。。

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Make Bicycle More Stable 讓自行車更穩的挑戰

最近NHK的電視節目”超絶凄ワザ! “播出跟自行車有關的節目,探討製作出更加安全的自行車。這裡提到的安全性,就看空手騎車滑行時,如何可以讓自行車更穩 (不倒)。找來了鼎鼎大名日本手工車架的職人 Cherubim 今野真一,對上東大電機的岩瀨将美教授。

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How to find the longest possible quasi-constant subsequence of array?

This is my task2 challenge. I’ve tried to solve this question, but my result wasn’t good. Although there was no error after testing, I only got 33% score.?

The summary of question shows as below:

I was given a non-empty unsorted array such as: A = [6, 10, 6, 9, 7, 8]. The amplitude of a subsequence of array A is the difference between the largest and the smallest element in this subsequence. The amplitude of the empty subsequence is assumed to be 0.

These are some of the subsequences of array A and their amplitudes:
[6, 6, 7] has amplitude 1;
[6, 10, 6, 9, 7, 8] has amplitude 4;
[6, 6, 7, 8] has amplitude 2.

If this subsequence of array is called quasi-constant, it means its amplitude does not exceed 1. In the example above, subsequence [6, 6, 7] is the longest possible quasi-constant subsequence of array A.

Now, you are expected to provide a method that takes in an array and returns the maximum number of quasi-constant subsequence of array. In above example, the function should return 3.

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How many countries are there in this rectangular map?

This is my task3 assessment. You need to count how many countries there are in this rectangular map.

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My first Codility test experience

Last week, I received an email from a recruiter who asked me to do Codility assessment. I had to answer three questions within 245 minutes. Although I’ve heard about Codility, this was my first Codility test experience. To be honest, it was really difficult to me.

These questions were not easy to understand, so it took me some time to understand each question. Then I tried to answer the questions by Java or Python programming language. Even though I eventually found the solutions and summited the answers, my average score was not good enough. When I finished this assessment, I was very disappointed with myself. I even thought whether I should keep a programmer job.???

It seems that more and more companies like to use Codility assessments to evaluate developers, but I don’t think it is the best way to test a programmer’s coding/programmer abilities.

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Bellman CX-25P 義式濃縮咖啡及奶泡機

在FB看到小狼狗 (有興趣可以去”滴咖“喝一杯)示範打奶泡的影片,這才知道這款咖啡機Bellman CX-25。這是款義式摩卡壺加打奶泡的機子,可以在瓦斯爐或電磁爐上使用。

平常就在用摩卡壺的我們,自然對這還可以打奶泡的摩卡壺感興趣。我在網上查了關於這機子的資料 (國內外還不少),越發覺得這很適合不想要太”高岡” (麻煩) & 太高貴的義式濃縮咖啡機的我們。

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Home-returning Rides 單車返鄉

這個農曆春節難得出太陽的”好”天氣,雖然除夕會是只有10度出頭的低溫,我還是打算騎單車返鄉。騎T3來做”重”訓。

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[Java] How to use SSL and Google Protobuf on Netty?

Recently, I tried to use Netty framework dealing with message transferring between different virtual machines which are including one server and some clients. Meanwhile, I need to use SSL mutual authentication and Google protobuf when these VMs do communication cross the internet. Although I had already encountered the term “SSL” a lot of times, I soon realised that I had never fully understood how it really works and how it could be implemented in Java.

I would like to share my experience about implementing SSL plus Google Protobuf on Netty. But I wouldn’t exactly tell you what Netty, SSL and Google protobuf are.

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Chiang Mai Trip 01 清邁之行-準備篇

出國這麼多次,都沒有去過東南亞 (忘了,有去過吳哥窟)。早期的心態對炎熱的地區沒有興趣,最近想法轉變。那裏還是有些自然美景及歷史古蹟值得欣賞。廉航廉價機票實在是”æ³°”便宜,那就去泰國看看吧。

[以下是為2015/11月初的行程記錄]

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