Q41. In relational data model, tables are called _______________
Q42. Each column name in a table should be unique. (T/F)
Q43. A row in a table is also known as _____________________
Q44. A column in a table is also known as ________________
Q45. Number of columns in a table is known as __________________
Q46. Number of rows in a table is known as __________________
Q47. __________________ is a set of values from which an attribute can take a value in each row.
Q48. A relation has 3 rows and 5 columns. What is the degree and cardinality of this relation?
Q49. Which of the following statement is wrong?
Q50. A special value ____________________ is used to represent values that are unknown to certain attributes.
