Excel 2013 Error: There was a problem sending the command to the program

I installed excel 2013 and I think everything went well during the installation. But I find there is something wrong with excel when double click a spreadsheet file and it will pop up a strange error dialog:

To fix the problem, we should do like this, and this is for Excel 2013 and Excel 2010:

1. Click the File tab, and then click Options.
2. Click Advanced, and then click to clear the Ignore other applications that use Dynamic Data Exchange (DDE) check box in the General area. (You need to scroll down quite a lot to see the General area)
3. Click OK.

Feelings and Experiences of CCD-333 Exam - Cloudera Certified Developer for Apache Hadoop (CCDH)

In October this year, I took a Cloudera Certified Developer for Apache Hadoop exam, which number is CCD-333. I successfully passed the exam, and looking back upon, all the efforts paid had value. This is a new exam and there is few materials in the internet talking about it, now I want to write something to share my feelings and experiences, which may help people who are preparing for the exam.


Part 1: Exam Preparation - Learning
1. Hadoop The Definite Guide 3rd


This is the book you must read before the exam, which explain very well and in details of Hadoop. I took a three days training by Cloudera certified trainer, but that class is an overview level training and is not very detailed. After the exam, I found the many questions examed are in the Definite Guide book rather than the training.
And very important, it's better that you read very carefully of Chapter 2 to 8 of this book, and maybe add chapter 9 and 10. I read them twice. But for chapter 11 to 16 which talks about the ecosystem of Hadoop (HBase, Hive, Pig etc.) , you don't need to read them if only for preparing the exam.

Part 2: The Exam CCD-333
The CCD-333 exam is 90 minutes with 60 questions, and the requirement is to score 67% or above. The exam tests many areas, the section scores below listing them precisely:

I feel that it exams a lot in the Input and Outpout of MapReduce, you need to understand the flow and details of MapReduce, and in the exam itself, I feel that time is sufficient to finish the exam.

Part 3: The certification

I wish this article is helpful for those who are preparing for this exam. All the best!

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