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Cloudera, BigData, Semantic IoT, Hadoop, NoSQL

Cloudera CDH/CDP 및 Hadoop EcoSystem, Semantic IoT등의 개발/운영 기술을 정리합니다. gooper@gooper.com로 문의 주세요.


*출처1 : https://www.cloudera.com/more/training/certification/cca-spark.html




*출처2 : http://www.hadoopexam.com/Cloudera_Certification/CCA175/CCA175_Cloudera_Hadoop_and_Spark_Developer_Tips_and_Tricks.pdf

1. Preparation: I have gone through all the CCA175 Questions and practice the code provided by
http://www.HadoopExam.com Thanks for your questions and code content. The content was
excellent and it helped me a lot. (Especially I have gone through all the Spark Professional
training module as well)
2. No. Of Questions: Generally you will get 10 questions in real exam: Topic will be coverings are
Sqoop, Hive, Pyspark and Scala and avro-tools to extract schema (All questions are covered in
CCA175 Certification Simulator).
3. Code Snippets: will be provided for Pyspark and Scala. You have to edit the snippets accordingly
as per the problem statement.
4. Real Exam Environment: Gateway node will be accessible for execution of the problems during
the exam. Keep in mind there will not be any on-screen timer available during the exam. You
have to keep asking for the time left. There are three sections for each problem i.e.
· Instructions
· Data Set
· Output Requirements.
Please go through all the three sections carefully before start developing the code.
Note: If you started developing code right after looking at the Instruction part of the question,
then later you will realized the exact details of the table like name of the table and HDFS
directory are also mentioned. This can waste your time if have to redo the code or might as well
cost you a question.
5. Editor: nano, gedit are not available. So if you have to edit any code snippets, you have to use vi
alone. Please make yourself familiar with vi editor if you are not.
6. Fill in blanks: You dont have to write entire code for Python and Scala for Apache Spark,
generally they will ask you to do fill in the blanks.
7. Flume: Very few questions on flume.
8. Difficulty Level: If you have enough knowledge, you will feel exam is quite easy. The questions
were logically easy and can be answered in the first attempt if you read the question carefully
(all three sections).
9. Common mistake in Sqoop: People use connector as localhost which is wrong, you have to use
full name instead of localhost (Avoid wasting your time). Use given hostname
10. Hive: Have initial knowledge of hive as well.
11. Spark: Using basic transform functions to get desired output. For instance filter according
particular scenario, sorting and ranking etc.
12. Avro-tool : avro-tool to get schema of avro file. (Very  nicely covered in CCA175
HadoopExam.com Simulator)
13. Big Mistake: Avoid accidently deleting your data: good practice is necessary to avoid such
mistakes. (Once you delete or drop hive table, you have to create it entirely once again.) Same is
instructed by www.HadoopExam.com during their videos  session provided at
http://cca175cloudera.training4exam.com/ (Please go through sample sessions)
14. Spark-sql: They will not ask questions based on Spark Sql learn importantly aggregate, reduce,
sort.
15. Time management: It is very important, (That’s the reason you need too much practice, use
CCA175 simulator to practice all the questions at least a week or two before your real exam).
16. Data sets in real exam is quite larger, hence it will take 2 to 5 mins for execution.

17. Attempts: try to attempt all questions at least 9/10, hence you must be able to score 70%.
18. File format: In most of questions there was tab delimited file to process.
19. Python or Scala: You will get a preloaded python or scala file to work with, so you don't have a
choice whether you want to attempt a question via scala or pyspark. (I have gone through all the
Video sessions provided by www.HadoopExam.com here
20. Connection Issue: If you got disconnected during exam, you may need to contact the proctor
immediately. If he/she is not available log back into examslocal.com and use their online help.
21. Shell scripts: Have good experience to use shell scripts.
22. Question types as mentioned in syllabus : Questions were from Sqoop(import and export),
Hive(table creation and dynamic partitioning), Pyspark and Scala(Joining, sorting and filtering
data), avro-tools. Snippets of code will be provided for Pyspark and Scala. You have to edit the
snippets accordingly as per the problem statement and can the script file(which is another file
apart from snippet) to get the results.
23. Overall exam is easy, but require lot of practice to complete on time and for accurate
solutions of the problem. Hence go through the all below material for CCA175 (It will not take
more than a month, if you are new and already know the Spark and Hadoop then 2-3 weeks
are good enough.
· CCA175 : Hadoop and Spark Developer Certification practice questions
· Hadoop professional training
· Spark professional training.

Wish you all the best

번호 제목 날짜 조회 수
670 Cloudera의 API를 이용하여 impala의 실행되었던 쿼리 확인하는 예시 2018.05.03 5049
669 python test.py실행시 "ImportError: No module named pyspark" 혹은 "ImportError: No module named py4j.protocol"등의 오류 발생시 조치사항 2017.07.04 5029
668 build.gradle을 pom.xml로 변환하는 방법 2016.08.18 5012
667 [oozie]Oozie WF수행시 단계별 ID넘버링 비교/설명 2022.03.23 4998
666 kafka-manager 1.3.3.4 설정및 실행하기 2017.03.20 4977
665 scan의 startrow, stoprow지정하는 방법 2015.04.08 4972
664 oozie의 meta정보를 mysql에서 관리하기 2014.05.26 4967
663 hadoop설치시 오류 2013.12.18 4965
662 hbase shell에서 컬럼값 검색하기(SingleColumnValueFilter이용) 2014.04.25 4963
661 W/F수행후 Logs not available for 1. Aggregation may not to complete. 표시되며 로그내용이 보이지 않은 경우 2020.05.08 4961
660 Spark 2.1.1 clustering(5대) 설치(YARN기반) 2016.04.22 4960
659 db를 통째로 새로운 이름의 db로 복사하는 방법/절차 2017.11.14 4943
658 메이븐 (maven) 설치 및 이클립스 연동하기 file 2013.03.06 4942
657 [CDP7.1.7]BDR작업후 오류로 Diagnostic Data를 수집하는 동안 "No content to map due to end-of-input at [Source: (String)""; line: 1, column: 0]" 오류 발생시 조치 2024.02.20 4933
656 Hue impala에서 query결과를 HDFS 파일로 export시 AuthorizationException: User 'gooper1234' does not have privileges to access: db명.query_impala_123456 2022.03.17 4912
655 Mysql DB 생성 및 권한. 특정아이피, 대역에 대한 접근 허용 2017.05.04 4908
654 갑자기 DataNode가 java.io.IOException: Premature EOF from inputStream를 반복적으로 발생시키다가 java.lang.OutOfMemoryError: Java heap space를 내면서 죽는 경우 조치방법 2017.07.19 4905
653 VisualVM 1.3.9을 이용한 spark-submit JVM 모니터링을 위한 설정및 spark-submit실행 옵션 2016.10.28 4904
652 [보안/인증]javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target발생 원인/조치내용 2023.10.24 4903
651 [HA구성 이슈]oozie 2대를 L4로 HA구성했을때 발생하는 이슈 2023.01.17 4903
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