Page 304 - Data Science class 11
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Q. 4. Answer any 5 out of the given 6 questions (1 × 5 = 5 marks)
i. Which one of these is not an insider threat?
a. Negligent or inadvertent user
b. Criminal or malicious insider
c. User credential theft
d. Hackers at competitions trying to expose vulnerabilities for a prize or reward.
ii. Which one of the below mentioned scenarios appears most likely to be from causation?
a. Reading one hour per day increases vocabulary
b. People who are homeless are more likely to have mental health issues.
c. The weight of a person has nothing to do with the risk of heart disease.
d. In India, as car sales increase, the birth rate also increases.
iii. Observer’s reliability is improved by:
a. Training observers
b. Using operational definitions
c. Restricting observations to specific time points
d. All of the above
iv. Sampling error is reduced by:
a. Correcting a faulty sample frame b. Increasing response rates
c. Increasing the sample size d. Reducing incomplete surveys
v. In vector, where all arguments are forced to a common type, please tick the correct order.
a. Expression < logical < double b. Double < logical < NULL
c. Integer < character < expression d. Character < logical < raw
vi. The geom function used to plot a scatter plot while using ggplot2 package is:
a. geom_point() b. geom_boxplot()
c. geom_line() d. geom_scatterplot()
Q. 5. Answer any 5 out of the given 6 questions (1 × 5 = 5 marks)
i. Which function is used to create a data frame in R?
a. data.frame() b. data.sets()
c. function() d. c()
ii. Undesired dissemination of previously collected data violates privacy. T/F
iii. In the evolution of data ecosystems, the stage in which data was large, unstructured and in motion, which one these
methods are not relevant to that stage?
a. Support Vector Machines b. Machine learning
c. Sensor based/ IOT d. Descriptive statistics
302 Touchpad Data Science-XI

