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

The following code loads senators.csv into a ________. import pandas as pd Senators_df = pd.read_csv('senators.csv')

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

Relational databases typically use ACID (Atomicity, xe "consistency"Consistency, Isolation, Durability) transactions. Which of the following ACID attributes is described by: "ensures that the database is modified only if all of a transaction's steps are successful?"

To query a Spark DataFrame, you must first create a xe "Spark (Apache):table view of a DataFrame"xe "table view of a Spark DataFrame"table view, which enables Spark SQL to query the DataFrame like a table in a ________ database.

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

Which of the following Hadoop ecosystem technologies is described by "real-time messaging, stream processing and storage, typically to transform and process high-volume streaming data, such as website activity and streaming IoT data."

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

Which of the following statements about MapReduce is false

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

Which of the following statements 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 is false?

A JSON dialect called ________ describes the boundaries of shapes such as countries, states, etc. for use in maps.

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

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

StreamingContext's ________ method begins the streaming process.

Which of the following statements a), b) or c) about Google's initial search implementation is false?