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NEW QUESTION: 1
CORRECT TEXT
Problem Scenario 70 : Write down a Spark Application using Python, In which it read a file "Content.txt" (On hdfs) with following content. Do the word count and save the results in a directory called "problem85" (On hdfs)
Content.txt
Hello this is ABCTECH.com
This is XYZTECH.com
Apache Spark Training
This is Spark Learning Session
Spark is faster than MapReduce
Answer:
Explanation:
See the explanation for Step by Step Solution and configuration.
Explanation:
Solution :
Step 1 : Create an application with following code and store it in problem84.py
# Import SparkContext and SparkConf
from pyspark import SparkContext, SparkConf
# Create configuration object and set App name
conf = SparkConf().setAppName("CCA 175 Problem 85") sc = sparkContext(conf=conf)
#load data from hdfs
contentRDD = sc.textFile(MContent.txt")
#filter out non-empty lines
nonemptyjines = contentRDD.filter(lambda x: len(x) > 0)
#Split line based on space
words = nonempty_lines.ffatMap(lambda x: x.split(''}}
#Do the word count
wordcounts = words.map(lambda x: (x, 1)) \
reduceByKey(lambda x, y: x+y) \
map(lambda x: (x[1], x[0]}}.sortByKey(False}
for word in wordcounts.collect(): print(word)
#Save final data " wordcounts.saveAsTextFile("problem85")
step 2 : Submit this application
spark-submit -master yarn problem85.py
NEW QUESTION: 2
A Linux administrator needs to prevent the Postfix mail transfer agent from starting on boot.
Which of the following commands will accomplish this task?
A. /etc/init.d/postfix stop
B. systemctl disable postfix.service
C. /etc/init.d/postfix disable
D. systemctl stop postfix.service
Answer: A
NEW QUESTION: 3
An administrator is testing the collision resistance of different hashing algorithms. Which of the following is the strongest collision resistance test?
A. Find two identical messages with different hashes
B. Find a common has between two specific messages
C. Find two identical messages with the same hash
D. Find a common hash between a specific message and a random message
Answer: A
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