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

Sequence

Remote Link

Data Link

Database Link

2 / 20

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

Error

ORACLE

NULL

ORA CLE

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

________ 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

5 / 20

Which of the following package procedure is UNRESTRICTED in Oracle?

EXECUTE_QUERY

CLEAR_BLOCK

CALL_INPUT

USER_EXIT

6 / 20

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

GRANT

SELECT

DELETE

INSERT

7 / 20

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

Database Schema

Database Abstraction

Database Instance

None of the Mentioned

8 / 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

9 / 20

How many memory layers does Oracle shared pool have?

10 / 20

Which of the following components comprise an Oracle architecture?

Database related background processes

Tablespaces

Datafiles

All of the above-mentioned

11 / 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

12 / 20

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

True

False

13 / 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

14 / 20

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

Remote Link

Data Link

Sequence

Database Link

15 / 20

The redo log buffer and Shared pool are elements of?

Buffer cache

SGA

PGA

PGA and Buffer cache

16 / 20

Which of the following is record based logical model?

Object oriented model

Network Model

E-R Model

None of the above

17 / 20

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

ORA CLE

ORACLE

NULL

ERROR

18 / 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

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 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.

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