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Dell E20-007 Exam Practice Questions (P. 4)

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Question #16
Which type of numeric value does a logistic regression model estimate?
  1. A
    Probability
  2. B
    A p-value
  3. C
    Any integer
  4. D
    Any real number

Correct Answer:
A

Question #17
Your colleague, who is new to Hadoop, approaches you with a question. They want to know how best to access their data. This colleague has a strong background in data flow languages and programming.
Which query interface would you recommend?
  1. A
    Pig
  2. B
    Hive
  3. C
    Howl
  4. D
    HBase

Correct Answer:
A

Question #18
The web analytics team uses Hadoop to process access logs. They now want to correlate this data with structured user data residing in a production single- instance JDBC database. They collaborate with the production team to import the data into Hadoop. Which tool should they use?
  1. A
    Sqoop
  2. B
    Pig
  3. C
    Chukwa
  4. D
    Scribe

Correct Answer:
A

Question #19
What does the R code -
z <- f[1:10, ]
do?
  1. A
    Assigns the first 10 rows of f to the vector z
  2. B
    Assigns the 1st 10 columns of the 1st row of f to z
  3. C
    Assigns a sequence of values from 1 to 10 to z
  4. D
    Assigns the 1st 10 columns to z

Correct Answer:
A

Question #20
In R, functions like plot() and hist() are known as what?
  1. A
    generic functions
  2. B
    virtual methods
  3. C
    virtual functions
  4. D
    generic methods

Correct Answer:
B

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