MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your R Programming knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following opens connection to gz-compressed text file? |
| A. | con <- gzfiles(“words.gz”) |
| B. | con <- gzfile(“words.gz”) |
| C. | con <- gzfile2(“words.gz”) |
| D. | con <- gzfiles2(“words.gz”) |
| Answer» C. con <- gzfile2(“words.gz”) | |
| 2. |
Which of the following code opens a connection to the file foo.txt, reads from it, and closes the connection when its done? |
| A. | data <- read.csv(“foo.txt”) |
| B. | data <- read.csvo(“foo.txt”) |
| C. | data <- readonly.csv(“foo.txt”) |
| D. | data <- getonly.csv(“foo.txt”) |
| Answer» B. data <- read.csvo(“foo.txt”) | |
| 3. |
Which of the following R code creates a connection to ‘foo.txt’? |
| A. | con <- file(“foo.txt”) |
| B. | open(con, “r”) |
| C. | opencon(con, “r”) |
| D. | ocon(con, “r”) |
| Answer» B. open(con, “r”) | |
| 4. |
Connections to text files can be created with the ________ function. |
| A. | url |
| B. | gzfile |
| C. | bzfile |
| D. | file |
| Answer» E. | |
| 5. |
Which of the following statement will load the objects to the file named “mydata.RData”? |
| A. | save(“mydata.RData”) |
| B. | load(“mydata.RData”) |
| C. | loadAll(“mydata.RData”) |
| D. | put(“mydata.RData”) |
| Answer» C. loadAll(“mydata.RData”) | |
| 6. |
Which of the following R statement will save the output to the file for following R code? |
| A. | save(a, b, file = “mydata.rda”) |
| B. | save_image(a, b, file = “mydata.rda”) |
| C. | keep(a, b, file = “mydata.rda”) |
| D. | keep_image(a, b, file = “mydata.rda”)View Answer |
| Answer» B. save_image(a, b, file = “mydata.rda”) | |
| 7. |
WHICH_OF_THE_FOLLOWING_CODE_CREATES_A_CONNECTION_TO_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚Àւ§FOO.TXT‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•_??$# |
| A. | con <- file(“foo.txt”) |
| B. | open(con, “r”) |
| C. | opencon(con, “r”) |
| D. | all of the mentioned |
| Answer» B. open(con, ‚Äö√Ñ√∂‚àö√ë‚àö‚à´r‚Äö√Ñ√∂‚àö√ë‚àöœÄ) | |
| 8. |
Which_of_the_following_code_opens_a_connection_to_the_file_foo.txt,_reads_from_it,_and_closes_the$ |
| A. | |
| B. | data <- read.csv(“foo.txt”) |
| C. | data <- read.csvo(“foo.txt”) |
| Answer» C. data <- read.csvo(‚Äö√Ñ√∂‚àö√ë‚àö‚à´foo.txt‚Äö√Ñ√∂‚àö√ë‚àöœÄ) | |
| 9. |
Connections to text files can be created with the ________ function? |
| A. | url |
| B. | gzfile |
| C. | bzfile |
| D. | file |
| Answer» B. gzfile | |
| 10. |
________ opens a connection to a file compressed with gzip. |
| A. | url |
| B. | gzfile |
| C. | bzfile |
| D. | file |
| Answer» E. | |
| 11. |
Which of the following statement will load the objects to the file named “mydata.RData” ?$ |
| A. | save(“mydata.RData”) |
| B. | load(“mydata.RData”) |
| C. | loadAll(“mydata.RData”) |
| D. | all of the mentioned |
| Answer» B. load(‚Äö√Ñ√∂‚àö√ë‚àö‚à´mydata.RData‚Äö√Ñ√∂‚àö√ë‚àöœÄ) | |
| 12. |
rda”)$ |
| A. | save_image(a, b, file = “mydata.rda”) |
| B. | keep(a, b, file = “mydata.rda”) |
| C. | all of the mentioned |
| Answer» C. all of the mentioned | |
| 13. |
Individual R objects can be saved to a file using the _____ function. |
| A. | save |
| B. | put |
| C. | save_image |
| D. | none of the mentioned |
| Answer» B. put | |