add new questions to hadoop

AkshayAjaykumar · May 12, 2021 · 7d5ab5f · 7d5ab5f
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diff --git a/README.md b/README.md
@@ -36,7 +36,7 @@ if you want to meet each other or discuss quiz related problems join the `Discor
 | [Git](git/git-quiz.md) :star:                                                |                                                                                                                                                                                      | => 92 questions | => 92 answers |                                                                                                             |
 | [Google Analytics](google-analytics/google-analytics-quiz.md)                |                                                                                                                                                                                      | => 65 questions | => 45 answers |                                                                                                             |
 | [Google Cloud Platform (GCP)](google-cloud-platform/gcp-quiz.md)             |                                                                                                                                                                                      | => 27 questions | => 27 answers |                                                                                                             |
-| [Hadoop](hadoop/hadoop-quiz.md)                                              |                                                                                                                                                                                      | => 18 questions | => 18 answers |                                                                                                             |
+| [Hadoop](hadoop/hadoop-quiz.md)                                              |                                                                                                                                                                                      | => 31 questions | => 18 answers |                                                                                                             |
 | [HTML](html/html-quiz.md)                                                    |                                                                                                                                                                                      | => 62 questions | => 62 answers | [@harman052](https://github.com/harman052)                                                                  |
 | [Java](java/java-quiz.md)                                                    |                                                                                                                                                                                      | => 65 questions | => 65 answers |                                                                                                             |
 | [Javascript](javascript/javascript-quiz.md)                                  |                                                                                                                                                                                      | => 70 questions | => 70 answers | [@harman052](https://github.com/harman052), [@taletski](https://github.com/taletski)                        |

diff --git a/hadoop/hadoop-quiz.md b/hadoop/hadoop-quiz.md
@@ -148,4 +148,40 @@
 - [x] S3A
 - [ ] S3N
 - [ ] S3
-- [ ] the EMR S3
+- [ ] the EMR S3
+
+#### Q26. HBase works with which type of schema enforcement?
+- [ ] schema on write
+- [ ] no schema
+- [ ] external schema
+- [ ] schema on read
+
+#### Q27. HDFS file are of what type?
+- [ ] read-write
+- [ ] read-only
+- [ ] write-only
+- [ ] append-only
+
+#### Q28. A distributed cache file path can originate from what location?
+- [ ] hdfs or top
+- [ ] http
+- [ ] hdfs or http
+- [ ] hdfs
+
+#### Q29. Which library should you use to perform ETL-type MapReduce jobs?
+- [ ] Hive 
+- [ ] Pig
+- [ ] Impala
+- [ ] Mahout
+
+#### Q30. What is the output of the Reducer?
+- [ ] a relational table
+- [ ] an update to the input file
+- [ ] a single, combined list
+- [ ] a set of <key, value> pairs
+
+#### Q31. To optimize a Mapper, what should you perform first?
+- [ ] Override the default Partitioner.
+- [ ] Skip bad records.
+- [ ] Break up Mappers that do more than one task into multiple Mappers.
+- [ ] Combine Mappers that do one task into large Mappers.