Control Structures in R Programming MCQ question and answer with solution

1

Which control structure in R is used to execute a block of code repeatedly until a condition is met?

A) if-else loop B) for loop C) while loop D) do-while loop

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Answer & Solution

Answer: Option C

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2

In R, what is the purpose of the if-else statement?

A) To execute a block of code if a condition is true, otherwise execute another block of code B) To create a loop that iterates a specified number of times C) To check multiple conditions sequentially D) To execute a block of code repeatedly until a condition is met

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Answer & Solution

Answer: Option A

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3

How is the switch() function used in R?

A) To toggle between TRUE and FALSE values B) To switch the positions of two elements C) To select one of several alternatives D) To change the direction of a loop

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Answer & Solution

Answer: Option C

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4

In R, what is the syntax for the for loop?

A) for (i in 1:10) { code_block } B) for (i = 1 to 10) { code_block } C) for (i = 1; i <= 10; i++) { code_block } D) for (i from 1 to 10) { code_block }

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Answer: Option A

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5

What is the purpose of the break statement in a loop in R?

A) To exit the loop immediately B) To skip the current iteration of the loop C) To restart the loop from the beginning D) To increment the loop variable

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Answer & Solution

Answer: Option A

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6

How is a while loop different from a for loop in R?

A) while loop is used for fixed iterations, for loop for variable iterations B) for loop is used for fixed iterations, while loop for variable iterations C) Both while and for loops are used for fixed iterations D) Both while and for loops are used for variable iterations

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Answer & Solution

Answer: Option B

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7

What does the next statement do in R?

A) Jumps to the next iteration of the loop B) Ends the loop immediately C) Skips the next condition in an if-else statement D) Moves to the next element in a vector

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Answer & Solution

Answer: Option A

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8

In R, what is the purpose of the repeat loop?

A) To repeat a block of code until a certain condition is met B) To repeat a block of code a specified number of times C) To repeat a block of code indefinitely D) To repeat a block of code based on a specific condition

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Answer & Solution

Answer: Option C

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9

What is the result of the expression 5 %% 2 in R?

A) 1 B) 2 C) 2.5 D) 0.5

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Answer: Option A

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10

In R, what is the role of the ifelse() function?

A) To check a single condition and execute different code based on the result B) To iterate over elements of a vector and apply a condition C) To generate random numbers based on a condition D) To switch between different conditions and values

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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