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 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

2 / 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.

3 / 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

4 / 20

When you join two or more tables, views, or materialized views, you combine ____ from both tables, views, or materialized views.

Columns

Rows

Both A and B

None of the above

5 / 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

6 / 20

Which processes is an instance made of Oracle?

Memory processes

Oracle background processes

Data processes

All of the Mentioned

7 / 20

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

Alternate

Foreign

Secondary

Primary

8 / 20

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

Error

ORACLE

NULL

ORA CLE

9 / 20

Which of the following is the oldest database model?

Physical

Deductive

Relational

Network

10 / 20

Which of the following package procedure is UNRESTRICTED in Oracle?

EXECUTE_QUERY

CLEAR_BLOCK

CALL_INPUT

USER_EXIT

11 / 20

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

Cost

Complexity

Difficult to manage

All of the above

12 / 20

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

GRANT

SELECT

DELETE

INSERT

13 / 20

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

ORA CLE

ORACLE

NULL

ERROR

14 / 20

Which of the following is referred to as the language used application programs to request data from the DBMS?

Query language

DDL

DML

None of the above

15 / 20

How many memory layers does Oracle shared pool have?

16 / 20

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

True

False

17 / 20

The redo log buffer and Shared pool are elements of?

Buffer cache

SGA

PGA

PGA and Buffer cache

18 / 20

Which of the following is another name of Oracle database’s design?

Database Schema

Database Abstraction

Database Instance

None of the Mentioned

19 / 20

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

True

False

20 / 20

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

Sequence

Remote Link

Data Link

Database Link

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