Oracle Entry-Level Interview Questions

Here is a quick and informal assessment quiz to evaluate the foundational knowledge and skills of candidates aspiring to start their careers in Oracle technologies. This assessment focuses on core database concepts, SQL proficiency, and an understanding of Oracle tools. Let's get right at it!

1 / 20

Which of the following keyword is used with Data Control Language (DCL) statements?

GRANT

SELECT

DELETE

INSERT

2 / 20

Which schema object instructs Oracle to connect to remotely access an object of a database?

Remote Link

Data Link

Sequence

Database Link

3 / 20

You can add a datafile to a tablespace by using the ALTER TABLESPACE ADD DATAFILE SIZE; statement. True or False?

True

False

4 / 20

Which of the following is not a type of join?

Inner

Spin

Outer

Equi

5 / 20

Which of the following is record based logical model?

Object oriented model

Network Model

E-R Model

None of the above

6 / 20

Which of the following commands is used to obtain the structure of an Oracle table?

STRUCTURE [TableName].

DESCRIBE STRUCTURE [TableName].

DESC TABLE [TableName].

DESCRIBE [TableName].

7 / 20

Which of the following package procedure is UNRESTRICTED in Oracle?

EXECUTE_QUERY

CLEAR_BLOCK

CALL_INPUT

USER_EXIT

8 / 20

The size and content of the PGA (Program Global Area) are independent of the Oracle server options installed. True or False?

True

False

9 / 20

What is the result of the following "ORA’NULL’CLE"?

ORA CLE

ORACLE

NULL

ERROR

10 / 20

Which of the following is the oldest database model?

Physical

Deductive

Relational

Network

11 / 20

Which of these are temporal data types?

Sum datatype, Count datatype, and Average datatype

Date datatype, Time stamp datatype, Interval datatype

Join datatype, Equi datatype, Inner datatype

Sub query, Sub joins, and Cross joins

12 / 20

________ are generally executed in the form of subqueries where rows are picked up only from the first (left) table concerning a condition (or a set of conditions) that is matched in the second table.

Anti-Join Query

Semi-Join Query

Natural Join

Outer Join

13 / 20

What is the result of the following "ORA’NULL’CLE"?

ORA CLE

ORACLE

NULL

ERROR

14 / 20

Which of the following is correct in this scenario?

The user can not create tables

The user can create tables

The user cannot query any tables

None of the Mentioned

15 / 20

Which of the following areas of PGA stores binding variables and run-time buffers information?

Stack space

Private SQL area

Session area

SQL area

16 / 20

Which of the following is not a Key in SQL Server?

Alternate

Foreign

Secondary

Primary

17 / 20

The NVL function is used to replace NULL values with another or given value?

True

False

18 / 20

Which of the following statements is not an advantage of bind variables?

Bind variables also protect against SQL injection attacks, require minimal maintenance, and reduce memory usage.

Bind variables improve performance through caching and reusing, reducing the need for parsing

Bind variables uses heuristics or rules of thumb and statistics to decide on the most efficient execution plan based on available indexes, table size, and query complexity.

Non of the above.

19 / 20

Which of the following is a disadvantage of the Oracle database?

Cost

Complexity

Difficult to manage

All of the above

20 / 20

Which of the following components comprise an Oracle architecture?

Database related background processes

Tablespaces

Datafiles

All of the above-mentioned

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