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 the oldest database model?

Physical

Deductive

Relational

Network

2 / 20

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

True

False

3 / 20

Which of the following is correct about Oracle?

OracleDB is another name for it

Oracle is a relational database management system

Oracle was built in 1977

All of the above-mentioned

4 / 20

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

Cost

Complexity

Difficult to manage

All of the above

5 / 20

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

ORA CLE

ORACLE

NULL

ERROR

6 / 20

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

True

False

7 / 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

8 / 20

Which of the following is not a type of join?

Inner

Spin

Outer

Equi

9 / 20

Which of these is not a type of backup in Oracle?

COLD Backup

FILE Backup

HOT Backup

RMAN Backup

10 / 20

Which processes is an instance made of Oracle?

Memory processes

Oracle background processes

Data processes

All of the Mentioned

11 / 20

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

ORA CLE

ORACLE

NULL

ERROR

12 / 20

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

Remote Link

Data Link

Sequence

Database Link

13 / 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

14 / 20

The redo log buffer and Shared pool are elements of?

Buffer cache

SGA

PGA

PGA and Buffer cache

15 / 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

16 / 20

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

Sequence

Remote Link

Data Link

Database Link

17 / 20

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

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

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

20 / 20

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

GRANT

SELECT

DELETE

INSERT

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