Ensurepass  QUESTION 51 What is the difference between a failed task attempt and a killed task attempt?   A. A failed task attempt is a task attempt that threw an unhandled exception. A killed task attempt is one that was terminated by the JobTracker. B. A failed task attempt is a task attempt that did not generate any key value pairs. A killed         task attempt is a task attempt that threw an exception, and thus killed by the execution framework. C. A Read more [...]
Ensurepass    QUESTION 31 Which process describes the lifecycle of a Mapper?   A. The JobTracker calls the TaskTracker's configure () method, then its map () method and finally its close () method. B. The TaskTracker spawns a new Mapper to process all records in a single input split. C. The TaskTracker spawns a new Mapper to process each key-value pair. D. The JobTracker spawns a new Mapper to process all records in a single file.   Answer: C Explanation: For each Read more [...]
Ensurepass    QUESTION 41 Which project gives you a distributed, Scalable, data store that allows you random, realtime read/write access to hundreds of terabytes of data?   A. HBase B. Hue C. Pig D. Hive E. Oozie F. Flume G. Sqoop   Answer: A Explanation: Use Apache HBase when you need random, realtime read/write access to your Big Data. Note: This project's goal is the hosting of very large tables -- billions of rows X millions of columns -- atop clusters Read more [...]
Ensurepass  QUESTION 11 You want to perform analysis on a large collection of images. You want to store this data in HDFS and process it with MapReduce but you also want to give your data analysts and data scientists the ability to process the data directly from HDFS with an interpreted high- level programming language like Python. Which format should you use to store this data in HDFS?           A. SequenceFiles B. Avro C. JSON D. HTML E. XML F. Read more [...]
Ensurepass  QUESTION 21 You need to move a file titled "weblogs" into HDFS. When you try to copy the file, you can't. You know you have ample space on your DataNodes. Which action should you take to relieve this situation and store more files in HDFS?   A. Increase the block size on all current files in HDFS.         B. Increase the block size on your remaining files. C. Decrease the block size on your remaining files. D. Increase the amount of memory for Read more [...]
Ensurepass Exam A   QUESTION 1 Table metadata in Hive is:   A. Stored as metadata on the NameNode. B. Stored along with the data in HDFS. C. Stored in the Metastore. D. Stored in ZooKeeper.   Answer: C Explanation: By default, hive use an embedded Derby database to store metadata information. The metastore is the "glue" between Hive and HDFS. It t ells Hive where your data files live in HDFS, what type of data they contain, what tables they belong to, etc.   The Read more [...]