Author: Anonymous

The highness or lowness of a sound is perceived as:

The horizontal and vertical components of the initial velocity of a football are 15 m/s and 20 m/s, respectively. What is the initial speed of the football?

The highness or lowness of a sound is perceived as:

The ……………………………………. is a dedicated HDFS implementation used in HDFS HA to provide a highly available shared edit log. It is the recommended choice for most HDFS installations.

The mappers and reducers write their output to HDFS.

Consider the sample CapacityScheduler configuration file given below, which creates and configures two queues, namely: XYZ and ABC. yarn.scheduler.capacity.root.queues XYZ, ABC yarn.scheduler.capacity.root.XYZ.capacity 60 yarn.scheduler.capacity.root.ABC.capacity 40 yarn.scheduler.capacity.root.XYZ.maximum-capacity 80 1. How much of the cluster resources will be used by a job running in queue ABC, assuming that it is the only job in the cluster? Answer in percentage: _______ %  2. How much of the cluster resources will be used by a job running in queue XYZ, assuming that it is the only job in the cluster? Answer in percentage: _______ % 3. How much of the cluster resources will be used by jobs in queue ABC, assuming that there are many jobs running in ABC and queue XYZ is idle? Answer in percentage: _______ %  4. How much of the cluster resources will be used by jobs in queue XYZ, assuming that there are many jobs running in XYZ and queue ABC is idle? Answer in percentage: _______ %

Setting the Mapper and Reducer classes for MapReduce applications in the Driver code is optional.

Fill in blanks: One of the common Hadoop processing workloads is ETL. ETL stands for _______ , _______ , and _______ respectively.

  Consider the figure above that shows 3 case scenarios, namely a, b and c, for running a map task with respect to the location of its data block. 1. The best case scenario for running the map task is case _______ (Type: a, b, or c) 2. The worst case scenario for running the map task is case _______ (Type: a, b, or c) 3. With respect to the network topology, the distance between the map task and its block in case a is _______ 4. With respect to the network topology, the distance between the map task and its block in case b is _______ 5. With respect to the network topology, the distance between the map task and its block in case c is _______  

Consider the verbose output below from submitting a wordcount mapreduce job in the terminal.   For the “How many” questions please type a number only. 1. How many mappers were used by the application? Answer: _______ 2. How many reducers were used by the application? Answer: _______ 3. How many unique words were found by the application? Answer: _______   4. How many data blocks were processed by the application? Answer: _______ 5. How many lines were processed by the application? Answer: _______ 6. How many output files were created by the application? Answer: _______ 7. Did the application use any combiners? Answer yes/no: _______