EMC E20-065 Online Practice Questions and Exam Preparation

EMC E20-065 Online Questions & Answers

• Question 21:

  What is an intended application of the MapReduce framework?

  A. Processing can be broken into smaller pieces
  B. Processing a large number of small files
  C. Processing in real time is required
  D. Processing a small subset of data
  A. Processing can be broken into smaller pieces

• Question 22:

  In a social network, what does it mean for a node to have a high degree but low betweenness?

  A. The node is adjacent to a few nodes, each of each has high Page Ranks.
  B. The node has the only edge connecting its community to the rest of the graph.
  C. The node can be easily bypassed by communications taking other shorter paths.
  D. The node acts as the hub of the graph.
  D. The node acts as the hub of the graph.

• Question 23:

  What do first-order and second-order Markov processes have in common concerning next word prediction?

  A. Both use WordNet to model the probability of the next word
  B. Both are unsupervised methods
  C. Both provide the foundation to build a trigram language model
  D. Neither makes assumptions about the probability of the next word
  C. Both provide the foundation to build a trigram language model

• Question 24:

  Which metric would be most helpful in identifying a node that may cause network disruption if the node were removed?

  A. Degree
  B. Closeness
  C. Betweenness
  D. PageRank
  A. Degree

• Question 25:

  Which library is NOT part of the Apache Spark distribution?

  A. MLib
  B. NLTK
  C. GraphX
  D. Spark SQL
  B. NLTK

• Question 26:

  You conduct a TFIDF analysis on 3 documents containing raw text and derive TFIDF ("data", document y) = 1.908. You know that the term "data" only appears in document 2. What is the TF of "data" in document 2?

  A. 2 based on the following reasoning: TFIDF = TF1DF = 1 908 You then know that IDF will equal LOG (32)=0.954 Therefore, TFIDF=TF*0.954 = 1.908 TF will then round to 2
  B. 4 based on the following reasoning: TFIDF = TF1DF = 1.908 You then know that IDF will equal LOG (3/1 )=0.477 Therefore, TFIDF=TF'0 477 = 1.908 TF will then round to 4
  C. 6 based on the following reasoning: TFIDF = TF1DF = 1.908 You then know that IDF will equal 3/1=3 Therefore, TFIDF=TF/3 = 1.908 TF will then round to 6
  D. 11 based on the following reasoning: TFIDF = TF1DF = 1908 You then know that IDF will equal LOG(3/2)=0.176 Therefore, TFIDF=TF"0.176 = 1.908 TF will then round to 11
  B. 4 based on the following reasoning: TFIDF = TF1DF = 1.908 You then know that IDF will equal LOG (3/1 )=0.477 Therefore, TFIDF=TF'0 477 = 1.908 TF will then round to 4

• Question 27:

  What runs more efficiently because of Apache Tez?

  A. Pig and Hive
  B. Hive and HBase
  C. Yarn and Spark
  D. All MapReduce jobs
  D. All MapReduce jobs

• Question 28:

  You develop a Python script "logisticpy" to evaluate the logistic function denoted as f(y) for a given value y that includes the following Pig code:

  Register 'logistic.py' using jython as udf;

  z = FOREACH y GENERATE $0, udf.logistic ($0);

  DUMP z;

  What is the expected output when the Pig code is executed?

  B. Jython is not a supported language
  C. Value of f(y) for ally
  D. Tuples (y, f(y))
  D. Tuples (y, f(y))

• Question 29:

  What are the major components of the YARN architecture?

  A. ResourceManager and NodeManager
  B. Task Tracker and NameNode
  C. HDFS, Tez, and Spark
  D. Avro, ZooKeeper, and HDFS
  A. ResourceManager and NodeManager

• Question 30:

  What is an effective use of color in visualization?

  A. Use self-explanatory colors so a legend is unnecessary
  B. Maximize use of color to make a more lasting impression
  C. Use high contrast colors such as red and blue
  D. Minimize use of color except for emphasis
  C. Use high contrast colors such as red and blue