Dell-EMC e20-065 practice test
Data Scientist Advanced Analytics Specialist Exam
Question 1
What is the maximum degree of a node in an undirected graph with 50 nodes'?
- A. 49
- B. 50
- C. 1250
- D. 2500
Answer:
A
Question 2
What is NOT a category of a NoSQL data store?
- A. Columnar
- B. Document
- C. Key/Value
- D. Flat File
Answer:
D
Question 3
A hotel chain runs a simul-ation on room pricing. They want to estimate revenue, per hotel, within
+/- $10 with 95% confidence (Za/2=1.96). The estimated revenue standard deviation is $5000 based
on previous booking data.
What is the optimal number of simulation trials to run?
- A. A 32-bit operating system was used
- B. The same number of trials was used
- C. A linear congruential generator (LCG) was used (or pseudo-random number generation
- D. Different seeds tor the random number generator were used.
Answer:
C
Question 4
A simul-ation to compare two different sales models yields different results for the same set of input
variables in different runs.
What is the likely cause?
- A. bit operating system was used
- B. The same number of trials was used.
- C. A linear congruenlial generator (LCG) was used for pseudo-random number generation.
- D. Different seeds forthe random number generator were used
Answer:
C
Question 5
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.
Answer:
D
Question 6
What is a key beneficial characteristic of the Random Forest algorithm?
- A. Provides and explanatory model
- B. Distinguishes categorical from continuous variables
- C. Support for unstructured data
- D. Resiliency to complex, non-linear variable interactions
Answer:
D
Question 7
If two of the communities are re-designated to be one community, how does that change the
network characteristics?
Refer to the exhibit.
- A. Neighborhood overlap would increase
- B. Network diameter would decrease
- C. Modularity would increase
- D. Modularity would decrease
Answer:
B
Question 8
What is a characteristic of stemming?
- A. Reduces words of variant forms to their base forms based on a set of heuristics
- B. Can be performed by calling the stemming!) function on a lemma in NLTK
- C. Can be performed by calling the stemming() function on a synset in NLTK
- D. Reduces words of variant forms to their base forms based on a dictionary
Answer:
A
Question 9
What does YARN provide over and above MapReduce?
- A. Separate cluster and resource management
- B. Parallelized processing
- C. Serialized processing
- D. Access to HDFS data
Answer:
A
Question 10
Which Hadoop Files System shell command copies data from a local file system into HDFS?
- A. rm
- B. cp
- C. put
- D. get
Answer:
C