Control Structures in R Programming MCQ question and answer with solution

81

Point out the correct statement?

A) The only way to exit a repeat loop is to call break B) Infinite loops should generally be avoided C) Control structures like if, while, and for allow you to control the flow of an R program D) All of the mentioned

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Answer & Solution

Answer: Option D

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82

Which of the following statement can be used to explicitly control looping?

A) if B) while C) break D) for

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Answer & Solution

Answer: Option C

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83

. . . . . . . . prints out the function call stack after an error occurs.

A) trace() B) traceback() C) back() D) traback()

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Answer & Solution

Answer: Option B

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84

. . . . . . . . allows you to insert debugging code into a function a specific places

A) debug() B) trace() C) browser() D) traceback()

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Answer & Solution

Answer: Option B

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85

What will be the output of log (-5.8) when executed on R console?

A) NAN B) NA C) Error D) 0.213

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Answer & Solution

Answer: Option A

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86

Which of the following R syntax is correct for while loop?

A) while ( statement1 ) statement2 B) while ( statement1 ) else statement2 C) while ( statement1 ) do statement2 D) while ( statement2 ) doelse statement2

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Answer & Solution

Answer: Option A

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87

Point out the wrong statement?

A) Functions in R are "second class objects" B) The writing of a function allows a developer to create an interface to the code, that is explicitly specified with a set of parameters C) Functions provides an abstraction of the code to potential users D) Writing functions is a core activity of an R programmer

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Answer & Solution

Answer: Option A

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88

Which package can be integrated with dplyr for large fast tables?

A) Table B) Data, dplyr C) Data.table D) Dplyr.table

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Answer & Solution

Answer: Option C

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89

Which package in R supports the exploratory analysis of genomic data?

A) Adegenat B) Adegenet C) Adegnet D) Adezenet

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Answer & Solution

Answer: Option B

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90

Point out the correct statement?

A) POSIX represents a portable operating system interface, primarily for UNIX systems B) There are different levels of indication that can be used, ranging from mere notification to fatal error C) The default input format for POSIX dates consists of the month, followed by the year and day, separated by slashes or dashes D) R don't have any way to indicate to you that something's not right

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Answer & Solution

Answer: Option A

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Control Structures in R Programming MCQ question and answer with solution | R Programming MCQs