In June 2019, I passed the Oracle-certified Java Silver SE 8, so I summarized the study methods at that time.

What is Java Silver?

One of the qualifications of Java engineers certified by Oracle, which is called "qualification for development beginners" It is positioned.
Java Gold: Qualification for intermediate and advanced users
Java Silver: Qualification for beginners
Java Bronze: Introductory qualification for language inexperienced people
You must have passed Silver in advance to get the highest Gold.
[Relationship between ITSS Career Framework and Certification Examination / Qualification](http://www.ssug.jp/docs/isv/ITSS%E3%82%AD%E3%83%A3%E3%83%AA] % E3% 82% A2% E3% 83% 95% E3% 83% AC% E3% 83% BC% E3% 83% A0% E3% 83% AF% E3% 83% BC% E3% 82% AF% E3 % 81% A8% E8% AA% 8D% E5% AE% 9A% E8% A9% A6% E9% A8% 93% E3% 83% BB% E8% B3% 87% E6% A0% BC% E3% 81 Looking at% AE% E9% 96% A2% E4% BF% 82 (ISV% 20Map% 20Ver9r1) .pdf), Java Silver (OCJP Silver) is positioned at the same level 1 as the IT passport.
However, I think the actual exam level is more difficult than the IT passport.
The test fee may change depending on the exchange rate, but when I took the test, it was 26,600 yen (excluding tax).
I was a little hesitant to apply for the exam because it was the highest exam fee I have ever taken ...

Rough flow until the exam

What you did	Implementation date
When I thought about taking the exam	2018/Around 02
Start collecting information about the exam	2018/Around 02
Purchase of problem collection (white book)	2019/02/11
Purchase of problem collection (black book)	2019/Around the end of 05
Examination application date	2018/06/06
Start full-scale learning	2018/06/09
test day	2018/06/29

After I bought the workbook in February, I haven't studied for about 4 months as a result of a series of moving and misfortunes of my relatives.
Therefore, I thought that this was not good, so I used the rough work of "applying for the exam first and making it impossible to withdraw."
If you don't do that, you're a "skilled person" who can't get into studying ...
Since I had more than 5 years of experience in developing with Java, I bought only the problem book without buying the reference book.
At first, I bought a Kindle version of Shiramoto, but for a while it was "sometimes read on the train".
I bought a book version of the black book around the end of May, but I hardly saw anything other than the exercises at the end of the book.
My study style is Get Java Silver in commuting time! Like @ Keitaro-G-21, I mainly study on the commuter train, and on holidays I break down the exercises once. It was a simple feeling that it was over when I was there.
Even though I spend a lot of time studying on the commuter train, I just read the white books, so I don't think I had that much in mind.
However, I think I was fine with this because I had some experience with Java so far.
In the end, I only did two laps of the exercises for Kuromoto and Shiramoto, but I was able to pass the exam with a correct answer rate of 90%.
I think that the correct answer rate is low among those who have more than 5 years of Java experience ...

As mentioned in the following article, "[Kuromoto](https://www.amazon.co.jp/dp/4844339931] has received tremendous support from Java Silver test takers. /)"is.
Is Java SE8 Silver useful for Java development work? ??
Starting from 0, learning Java Silver
As you have pointed out, there were many questions that were the same as or almost the same as Kuromoto, so I think you should definitely read Kuromoto.
Almost the same questions as Shiramoto's question were given, but since the level of Shiramoto's question is lower overall, it is better to solve Kuromoto's question and develop confidence and ability. I think.
If you read Shiramoto, you will be able to deal with various problems, but it may be subtle in terms of cost effectiveness.

As mentioned in this article, applying for the exam was very troublesome.
The above article is very easy to understand, so please read it before you get lost in applying for the exam.
Not only is it difficult to understand the entrance to the exam application, but it is also very complicated to create a "Pearson VUE account" and an "Oracle account" separately.

About 30 minutes after taking the test, I received an email notifying me of the pass / fail, but I could not confirm the pass / fail immediately.
The reason is that I made a mistake in the password for my Pearson VUE account three times in a row, which caused my account to be locked (tears).
If your account is locked, tell the contact (email address) displayed on the error screen the following three points and you will be able to unlock it the next business day at the earliest.
name
Oracle Testing ID
Oracle.com account username (email address)