EMC E20-065 Online Practice Questions and Exam Preparation

EMC E20-065 Online Questions & Answers

• Question 51:

  What is an important simu-lation design consideration?

  A. Ensure model Inputs align with reality
  B. Use different seed values to regenerate results
  C. For rare event models, minimize number of trials
  D. A complex model is better than a simple model
  A. Ensure model Inputs align with reality

• Question 52:

  What is the maximum number of edges in an undirected graph of 10 nodes?

  A. 45
  B. 90
  C. 100
  D. 9
  A. 45

• Question 53:

  A data engineer is asked to process several large datasets using MapReduce. Upon initial inspection the engineer realizes that there are complex interdependencies between the datasets. Why is this a problem?

  A. MapReduce works best on unstructured data
  B. There is no problem; MapReduce accommodates all the data
  C. MapReduce can only parse one file at a time.
  D. MapReduce is not ideal when the processing of one dataset depends on another.
  D. MapReduce is not ideal when the processing of one dataset depends on another.

• Question 54:

  In a connected, undirected graph of 5 nodes with 10 edges, how many more edges need to be added to make the clustering coefficient of every node equal 1 ?

  B. 5
  C. 10
  D. 15
  A

• Question 55:

  Which HDFS feature protects against user errors causing accidental loss of data?

  A. Encryption
  B. Replication
  C. Namenode federation
  D. Snapshots
  B. Replication

• Question 56:

  What is a random subspace of features, as used by Random Forests?

  A. A random subset of features that are chosen at each split in the decision tree
  B. Filtration of data that does not meet a pre-defined weighting thrsehold
  C. The creation of out-of-bag (OOB) data that is used to select features
  D. Removal of highly correlated variables to randomize the features
  A. A random subset of features that are chosen at each split in the decision tree

• Question 57:

  An edge has an embeddedness of 0. What is the edge most likely to be?

  A. Part of regular lattice
  B. Weak tie
  C. Part of a clique
  D. Strong tie
  C. Part of a clique

• Question 58:

  In the graph, which edge would be considered a weak lie? Refer to the exhibit.

  

  A. C-E
  B. E-F
  C. B-C
  D. G-l
  D. G-l

• Question 59:

  Why would a company decide to use HBase to replace an existing relational database?

  A. It is required for performing ad-hoc queries.
  B. Varying formats of input data requires columns to be added in real time.
  C. The company's employees are already fluent in SQL.
  D. Existing SQL code will run unchanged on HBase.
  A. It is required for performing ad-hoc queries.

• Question 60:

  In multinomial logistic regression, what is used to calculate the probability of outcome occurring?

  A. Logistic function applied to a linear combination of the input and outcome variables
  B. Linear regression applied to a combination of input variables
  C. Linear regression applied to a combination of input and outcome variables
  D. Logistic function applied to a linear combination of the input variables
  B. Linear regression applied to a combination of input variables