Oracle

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ORACLE

ASSESSMENT

(YOU HAVE ONLY 30 MINUTES TO COMPLETE THIS PART [20 Questions])

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1. In Oracle, what is a primary key used for?

To enforce uniqueness in a column

To establish relationships between tables

To provide a default value for a column

To sort the result set

2. Which SQL function is used to find the average value in a column in Oracle?

AVG

SUM

MIN

MAX

3. What is the purpose of the NVL function in Oracle?

To convert a value to uppercase

To replace NULL with a specified value

To concatenate two strings

To find the length of a string

4. Which function is used to find the minimum value in a column in Oracle?

MIN

AVG

MAX

SUM

5. Which statement is used to delete data from a table in Oracle?

DELETE

REMOVE

DROP

TRUNCATE

6. In Oracle, what is the purpose of the SELECT statement?

To update records

To retrieve data

To delete records

To insert records

7. What is the purpose of the INDEX in Oracle?

To define a unique constraint

To enforce referential integrity

To improve query performance

To create a virtual column

8. Which clause is used to sort the result set in descending order in Oracle?

DESC

ORDER DESC

SORT DESC

DESCENDING

9. What is the purpose of the HAVING clause in Oracle?

To filter rows in a query

To filter columns in a query

To filter groups in a query

To filter results based on a condition

10. What is the default sorting order in an ORDER BY clause in Oracle?

Descending

Ascending

Random

Alphabetical

11. Which statement is used to remove a table from the database in Oracle?

REMOVE TABLE

DELETE TABLE

DROP TABLE

ERASE TABLE

12. Which statement is used to add a new column to an existing table in Oracle?

ADD COLUMN

CREATE COLUMN

ALTER TABLE ADD COLUMN

INSERT COLUMN

13. Which function is used to find the total number of rows in a table in Oracle?

COUNT

SUM

AVG

MAX

14. Which SQL operator is used for pattern matching in Oracle?

BETWEEN

EXISTS

15. In Oracle, what is a foreign key used for?

To enforce uniqueness in a column

To establish relationships between tables

To provide a default value for a column

To sort the result set

16. In Oracle, what does the acronym PL/SQL stand for?

Procedural Language/Structured Query Language

Programming Language/Standard Query Language

Procedure Language/Structured Question Language

Procedural Logic/Structured Query Language

17. What is the purpose of the WHERE clause in a SQL query?

To specify the order of the result set

To filter the rows returned by a query

To join tables

To group rows based on a column

18. Which keyword is used to create an alias for a table or a column in Oracle?

ALIAS

NAME

RENAME

19. What does SQL stand for?

Structured Language

Standard Query Language

System Query Language

Sequential Query Language

20. Which data type is used to store variable-length character strings in Oracle?

CHAR

VARCHAR

CLOB

BLOB

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