The post is about R Language and Relational Databases Management System Quiz with Answers. There are 20 multiple-choice questions about R language and database connectivity with R. Let us start with the R Language and Relational Databases Management System Quiz now.
R Language and Relational Databases Quiz with Answers
R Language and Relational Databases Quiz
- Which R function loads multiple R data structures from a *.Rda file?
- Which of the following R variables holds the platform numeric limits for your R environment?
- What is the role of the ODBC Driver Manager in the context of database connectivity? https://rfaqs.com
- Suppose you are preparing to analyze sales data and have much information in an Excel spreadsheet. You have decided to convert the Excel spreadsheet to a relational database. What is your first step?
- Which of the following correctly describes the condition for the referential constraint to occur?
- Why is the SQL LOAD command recommended over the IMPORT command for large amounts of data?
- What are two reasons to map an existing data source, like pre-existing database tables, database dump files, or raw data, to a relational database design?
- Suppose, There are two tables in your database design: Customers, which lists all your customers, and Orders, which lists all the sales transactions that your customers have made over the years. Both the tables have a field called Customer_ID. Which of the following describes the relationship between the two tables?
- What is the SQL DDL command that can be used to add primary keys to an existing table in a database?
- What is the recommended SQL command for loading small to medium amounts of data into a database?
- What are two ways to limit database movement and increase performance when querying a database?
- What type of relationship does the database model indicate between each school board and multiple schools?
- Which method is recommended to avoid unnecessary data transfer when analyzing data with a powerful database engine?
- Which statement best describes data definition language (DDL) operations?
- Which of the following is the correct general syntax for the INSERT statement?
- Which statement best describes what a factor is in R?
- Which SQL statement is used to delete records from a table?
- Which of the following displays the correct general syntax for the SELECT statement that also includes a predicate?
- What is a primary key?
- Which of the following is classified as a data manipulation language (DML) statement?
