Infosys Certified Data Science Professional Using R
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Join Premium10 Infosys Certified Data Science Professional Using R practice questions with answers
Real Lex exam-pattern multiple-choice questions for the Infosys Certified Data Science Professional Using R certification. Each question includes the correct answer. The full question bank is available to Premium members.
- Question 1
Assume a dataset containing transactions of several customers in a clothing retail store. There are two items purchased: x and y. Now, for an association rule x → y, if the Confidence is 0.6, what does it imply?
- ✓
60% of customers bought both items x and y
Correct - B
60% of all customers who purchased x also purchased y
- C
40% of customers bought both items x and y
- D
40% of all customers who purchased x also purchased y
- ✓
- Question 2
A fair six-sided die is rolled twice. What is the probability of getting a 2 and a 3 (irrespective of order)?
- ✓
1/18
Correct - B
1/36
- C
1/6
- D
1/12
- ✓
- Question 3
State True or False: Box plot can be used to detect outliers from the timeseries data
- ✓
true
Correct - B
false
- ✓
- Question 4
Which are the valid options for the MARGIN argument in apply(X, MARGIN, FUN)?
- ✓
1.0
Correct - B
2.0
- C
1 or 2
- D
All the options
- ✓
- Question 5
The vector indexing in R starts from:
- ✓
0.0
Correct - B
1.0
- ✓
- Question 6
Refer to the following data and then answer the questions asked x: 4 6 9 10 11 y: 2 4 4 7 8 What is the value of the correlation coefficient?
- ✓
0.91
Correct - B
0.76
- C
-0.91
- D
0.83
- ✓
- Question 7
According to the properties of determinant, if multiple of one row is added to another row, then the determinant
- ✓
Multiplied
Correct - B
Added and then multiplied
- C
unchanged
- D
None of options
- ✓
- Question 8
Which of the following is not a measure of central tendency
- ✓
3rd quartile
Correct - B
2nd quartile
- C
Mean
- D
None of the options
- ✓
- Question 9
In statistics, the 3 Ms, Mean, Median and Mode are:
- ✓
Measures of dispersion
Correct - B
central tendency
- C
frequency distribution
- D
All the options
- ✓
- Question 10
A six-month moving average forecast is better than a three-month moving average forecast if demand: a. is rather stable b. has been changing due to recent promotional efforts c. follows a downward trend d. follows a seasonal pattern that repeats itself twice a year
- ✓
Only a
Correct - B
Only b
- C
b and d
- D
none
- ✓
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