Exam 17: Big Data: Hadoop, Spark, Nosql and Iot  

PubNub provides the ________ Python module for conveniently performing pub/sub operations.

Which of the following statements a), b) or c) is false?

Which of the following statements a), b) or c) is false?

Which of the following statements is false?

Every RDD has access to the current SparkContext via the attribute ________.

The following dashboard visualizes simulated sensors from the PubNub simulated IoT sensors stream: For each sensor, the visualization shows a Gauge (the semicircular visualizations) and a ________ (the jagged lines) to visualize the data.

Which of the following statements a), b) or c) is false?

Which of the following statements reflect security, privacy and ethical concerns associated with IoT?

Which of the following statements about text searching in MongoDB is false?

The PubNub client uses a ________ key in combination with a channel name to subscribe to a channel.

Which of the following statements a), b) or c) is false?

xe "underscore:_ SQL wildcard character"________ in a pattern string indicates a single wildcard character at that position.

In the SQL query: SELECT * FROM authors The xe "* SQL wildcard character"asterisk (*) is a ________ indicating that the query should get all the columns from the authors table.

Which of the following statements is false?

Consider the following reducer code: 1 #!/usr/bin/env python3 2 # length_reducer.py 3 """Counts the number of words with each length.""" 4 import sys 5 from itertools import groupby 6 from operator import itemgetter 7 8 def tokenize_input(): 9 """Split each line of standard input into a key and a value.""" 10 for line in sys.stdin: 11 yield line.strip().split('\t') 12 13 # produce key-value pairs of word lengths and counts separated by tabs 14 for word_length, group in groupby(tokenize_input(), itemgetter(0)): 15 try: 16 total = sum(int(count) for word_length, count in group) 17 print(word_length + '\t' + str(total)) 18 except ValueError: 19 pass # ignore word if its count was not an integer Which of the following statements a), b) or c) is false?

Which of the following statements a), b) or c) is false?

Which of the following statements a), b) or c) is false?

Which of the following statements a), b) or c) is false?

Which of the following statements a), b) or c) is false?

Which of the following statements a), b) or c) is false?