Oracle 1Z0-171

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Oracle Database 23ai SQL Associate Sample Questions:

1. How are NULL values treated in relational databases?

A) NULL values are treated as empty strings.
B) NULL values are not allowed in relational databases.
C) NULL values are treated as zero.
D) NULL values represent missing or unknown data.

2. Which data dictionary view provides information about all tables accessible to the current user?

A) SESSION_TABLES
B) USER_TABLES
C) DBA_TABLES
D) ALL_TABLES

3. How can you ensure that data is sorted in descending order in a SQL query?

A) Use the DISTINCT keyword
B) Use the ASC keyword
C) Use the DESC keyword
D) Use the ORDER keyword

4. What is the purpose of the DBA_OBJECTS data dictionary view?

A) To show the current session details
B) To provide information about all objects in the database
C) To monitor system performance
D) To list all users in the database

5. How does SQL handle NULL values in arithmetic expressions?

A) Produces a NULL result
B) Treats them as zero
C) Treats them as the largest possible number
D) Produces an error

Solutions: