1. Which function is used to create a factor in R?

A . level()

B . factor()

C . makefactor()

D . levels()

Answer

2. Factors in R are used to handle _____ data.

A . numeric

B . logical

C . categorical

D . character only

Answer

3. Which function retrieves the levels of a factor?

A . levels()

B . factor()

C . categories()

D . classes()

Answer

4. What function is commonly used to tabulate the counts of factor levels?

A . count()

B . table()

C . freq()

D . tally()

Answer

5. How do you change the order of levels in a factor?

A . factor()

B . levels()

C . relevel()

D . order()

Answer

6. Which of the following is NOT a valid operation on factors?

A . Sorting

B . Summation

C . Tabulation

D . Level changing

Answer

7. In R, a table is mainly used to represent:

A . Logical operations

B . Frequency counts

C . String manipulations

D . Mathematical equations

Answer

8. Which function is used to create a contingency table?

A . ctable()

B . cross()

C . table()

D . xtabs()

Answer

9. How to extract a subtable from a table?

A . subset()

B . subtable()

C . extract()

D . slice()

Answer

10. To find the largest cell value in a table, we use:

A . max()

B . which.max()

C . largest()

D . findmax()

Answer

11. To get the total number of elements in a table, use:

A . sum()

B . total()

C . length()

D . count()

Answer

12. How do you find the cumulative sum of a numeric vector?

A . cumulate()

B . cumsum()

C . sum()

D . accsum()

Answer

13. Which function finds the cumulative product?

A . cumprod()

B . cummult()

C . prod()

D . accumulate()

Answer

14. What function in R finds the minimum value in a vector or table?

A . min()

B . minimum()

C . minval()

D . findmin()

Answer

15. What function finds the maximum value in a set of numbers?

A . max()

B . maximum()

C . maxval()

D . findmax()

Answer

16. Which function in R is used for integration (basic calculus)?

A . integrate()

B . calculus()

C . integral()

D . deriv()

Answer

17. Which function computes the derivative of a function?

A . deriv()

B . diff()

C . derive()

D . integrate()

Answer

18. To calculate probability density for a normal distribution, we use:

A . pnorm()

B . dnorm()

C . qnorm()

D . rnorm()

Answer

19. Which function generates random numbers from a normal distribution?

A . pnorm()

B . dnorm()

C . rnorm()

D . qnorm()

Answer

20. What does pnorm() compute?

A . Random value

B . Density

C . Cumulative probability

D . Quantile

Answer

21. Which function finds the quantile function of a normal distribution?

A . rnorm()

B . dnorm()

C . pnorm()

D . qnorm()

Answer

22. Which function would you use to find cumulative probabilities for binomial distribution?

A . pbinom()

B . dbinom()

C . rbinom()

D . qbinom()

Answer

23. What does dbinom() return?

A . Quantile

B . Cumulative probability

C . Probability mass

D . Random variate

Answer

24. To calculate probabilities for the Poisson distribution, we use:

A . ppois()

B . dpois()

C . rpois()

D . qpois()

Answer

25. rpois() function is used to:

A . Find cumulative probabilities

B . Find probability mass

C . Generate random numbers

D . Find quantiles

Answer

26. qpois() function in R is used for:

A . Probability density

B . Random generation

C . Quantile calculation

D . Summation

Answer

27. The function ppois() returns:

A . Probability density

B . Random number

C . Cumulative probability

D . Quantile

Answer

28. Which function would you use to calculate cumulative sum for a table column?

A . sum()

B . cumsum()

C . cumprod()

D . accumulate()

Answer

29. The function to compute the factorial of a number in R is:

A . factorial()

B . fact()

C . factorials()

D . factorialnum()

Answer

30. What function is used to find differences between successive elements?

A . diff()

B . deriv()

C . delta()

D . differences()

Answer

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Relevant Materials :

☞ R - Programming MCQs - Unit-1 - [ R-Programming ]

☞ R - Programming MCQs - Unit-2 - [ R-Programming ]

☞ R - Programming MCQs - Unit-3 - [ R-Programming ]

☞ R - Programming MCQs - Unit-4 - [ R-Programming ]

☞ R - Programming MCQs - Unit-5 - [ R-Programming ]

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