Mock Oracle Test -DBMS SQL,PL/SQL

1. A record is a collection of individual fields that represents a row in the table.

True

False

This statement is true because a record in a database is indeed a collection of individual fields that represent a row in a table. Each field in the record holds a specific piece of data, and together they form a complete set of information for that particular row. This allows for efficient organization and retrieval of data in a structured manner.

Explanation

This statement is true because a record in a database is indeed a collection of individual fields that represent a row in a table. Each field in the record holds a specific piece of data, and together they form a complete set of information for that particular row. This allows for efficient organization and retrieval of data in a structured manner.

2. What is the correct order for steps of initialing the cursor? a.FETCH b.OPEN C.Declare d.close

A,c,d,b,

C,b,a,d

B,d,a,c,

C,a,d,b,

The correct order for initializing the cursor is to first declare the cursor, then open it, fetch the required data, and finally close the cursor. So, the correct order is c (Declare), b (OPEN), a (FETCH), and d (close).

Explanation

The correct order for initializing the cursor is to first declare the cursor, then open it, fetch the required data, and finally close the cursor. So, the correct order is c (Declare), b (OPEN), a (FETCH), and d (close).

3. User-defined SUBTYPES are subtypes based on an existing type.

True

False

User-defined subtypes are subtypes that are created by the user based on an existing type. This means that the user can define new subtypes that inherit the characteristics and behaviors of the existing type, but with additional or modified attributes and behaviors. This allows for customization and specialization of types to better suit specific needs or requirements. Therefore, the statement "User-defined subtypes are subtypes based on an existing type" is true.

Explanation

User-defined subtypes are subtypes that are created by the user based on an existing type. This means that the user can define new subtypes that inherit the characteristics and behaviors of the existing type, but with additional or modified attributes and behaviors. This allows for customization and specialization of types to better suit specific needs or requirements. Therefore, the statement "User-defined subtypes are subtypes based on an existing type" is true.

4. While using FOR loop,Upper_Bound and Lower_Bound must be integers.

True

False

The statement is true because when using a FOR loop, the upper bound and lower bound values must be integers. The FOR loop is used to iterate over a sequence of values, and since integers are whole numbers, they are required to define the range of the loop. If non-integer values are used as bounds, it would result in a syntax error as the loop cannot iterate over non-integer values.

Explanation

The statement is true because when using a FOR loop, the upper bound and lower bound values must be integers. The FOR loop is used to iterate over a sequence of values, and since integers are whole numbers, they are required to define the range of the loop. If non-integer values are used as bounds, it would result in a syntax error as the loop cannot iterate over non-integer values.

5. %ROWTYPE is used to declare a variable with the same datatype as a column of a specific table

True

False

The statement is false because %ROWTYPE is used to declare a variable with the same datatype as a row in a specific table, not just a column. %ROWTYPE allows you to create variables that can hold an entire row of data from a table, including all of its columns. This can be useful when you want to perform operations on an entire row of data at once.

Explanation

The statement is false because %ROWTYPE is used to declare a variable with the same datatype as a row in a specific table, not just a column. %ROWTYPE allows you to create variables that can hold an entire row of data from a table, including all of its columns. This can be useful when you want to perform operations on an entire row of data at once.