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COF-C02 Practice Exam Questions and Answers

SnowPro Core Certification Exam

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Question # 1

What happens to the underlying table data when a CLUSTER BY clause is added to a Snowflake table?

Options:

A.  

Data is hashed by the cluster key to facilitate fast searches for common data values

B.  

Larger micro-partitions are created for common data values to reduce the number of partitions that must be scanned

C.  

Smaller micro-partitions are created for common data values to allow for more parallelism

D.  

Data may be colocated by the cluster key within the micro-partitions to improve pruning performance

Discussion 0
Question # 2

Which services does the Snowflake Cloud Services layer manage? (Select TWO).

Options:

A.  

Compute resources

B.  

Query execution

C.  

Authentication

D.  

Data storage

E.  

Metadata

Discussion 0
Question # 3

What is the minimum Snowflake edition required to create a materialized view?

Options:

A.  

Standard Edition

B.  

Enterprise Edition

C.  

Business Critical Edition

D.  

Virtual Private Snowflake Edition

Discussion 0
Question # 4

When reviewing a query profile, what is a symptom that a query is too large to fit into the memory?

Options:

A.  

A single join node uses more than 50% of the query time

B.  

Partitions scanned is equal to partitions total

C.  

An AggregateOperacor node is present

D.  

The query is spilling to remote storage

Discussion 0
Question # 5

During periods of warehouse contention which parameter controls the maximum length of time a warehouse will hold a query for processing?

Options:

A.  

STATEMENT_TIMEOUT__IN__SECONDS

B.  

STATEMENT_QUEUED_TIMEOUT_IN_SECONDS

C.  

MAX_CONCURRENCY__LEVEL

D.  

QUERY_TIMEOUT_IN_SECONDS

Discussion 0
Question # 6

What is the purpose of an External Function?

Options:

A.  

To call code that executes outside of Snowflake

B.  

To run a function in another Snowflake database

C.  

To share data in Snowflake with external parties

D.  

To ingest data from on-premises data sources

Discussion 0
Question # 7

Which data type can be used to store geospatial data in Snowflake?

Options:

A.  

Variant

B.  

Object

C.  

Geometry

D.  

Geography

Discussion 0
Question # 8

How often are encryption keys automatically rotated by Snowflake?

Options:

A.  

30 Days

B.  

60 Days

C.  

90 Days

D.  

365 Days

Discussion 0
Question # 9

Which of the following are best practice recommendations that should be considered when loading data into Snowflake? (Select TWO).

Options:

A.  

Load files that are approximately 25 MB or smaller.

B.  

Remove all dates and timestamps.

C.  

Load files that are approximately 100-250 MB (or larger)

D.  

Avoid using embedded characters such as commas for numeric data types

E.  

Remove semi-structured data types

Discussion 0
Question # 10

Which statement about billing applies to Snowflake credits?

Options:

A.  

Credits are billed per-minute with a 60-minute minimum

B.  

Credits are used to pay for cloud data storage usage

C.  

Credits are consumed based on the number of credits billed for each hour that a warehouse runs

D.  

Credits are consumed based on the warehouse size and the time the warehouse is running

Discussion 0
Question # 11

Which Snowflake feature is used for both querying and restoring data?

Options:

A.  

Cluster keys

B.  

Time Travel

C.  

Fail-safe

D.  

Cloning

Discussion 0
Question # 12

Which of the following are valid methods for authenticating users for access into Snowflake? (Select THREE)

Options:

A.  

SCIM

B.  

Federated authentication

C.  

TLS 1.2

D.  

Key-pair authentication

E.  

OAuth

F.  

OCSP authentication

Discussion 0
Question # 13

Which Snowflake technique can be used to improve the performance of a query?

Options:

A.  

Clustering

B.  

Indexing

C.  

Fragmenting

D.  

Using INDEX__HINTS

Discussion 0
Question # 14

Which of the following compute resources or features are managed by Snowflake? (Select TWO).

Options:

A.  

Execute a COPY command

B.  

Updating data

C.  

Snowpipe

D.  

AUTOMATIC__CLUSTERING

E.  

Scaling up a warehouse

Discussion 0
Question # 15

What Snowflake role must be granted for a user to create and manage accounts?

Options:

A.  

ACCOUNTADMIN

B.  

ORGADMIN

C.  

SECURITYADMIN

D.  

SYSADMIN

Discussion 0
Question # 16

A developer is granted ownership of a table that has a masking policy. The developer's role is not able to see the masked data. Will the developer be able to modify the table to read the masked data?

Options:

A.  

Yes, because a table owner has full control and can unset masking policies.

B.  

Yes, because masking policies only apply to cloned tables.

C.  

No, because masking policies must always reference specific access roles.

D.  

No, because ownership of a table does not include the ability to change masking policies

Discussion 0
Question # 17

Which Snowflake object enables loading data from files as soon as they are available in a cloud storage location?

Options:

A.  

Pipe

B.  

External stage

C.  

Task

D.  

Stream

Discussion 0
Question # 18

What feature can be used to reorganize a very large table on one or more columns?

Options:

A.  

Micro-partitions

B.  

Clustering keys

C.  

Key partitions

D.  

Clustered partitions

Discussion 0
Question # 19

What is the minimum Snowflake edition required for row level security?

Options:

A.  

Standard

B.  

Enterprise

C.  

Business Critical

D.  

Virtual Private Snowflake

Discussion 0
Question # 20

What transformations are supported in a CREATE PIPE ... AS COPY ... FROM (....) statement? (Select TWO.)

Options:

A.  

Data can be filtered by an optional where clause

B.  

Incoming data can be joined with other tables

C.  

Columns can be reordered

D.  

Columns can be omitted

E.  

Row level access can be defined

Discussion 0
Question # 21

What happens to the shared objects for users in a consumer account from a share, once a database has been created in that account?

Options:

A.  

The shared objects are transferred.

B.  

The shared objects are copied.

C.  

The shared objects become accessible.

D.  

The shared objects can be re-shared.

Discussion 0
Question # 22

Where is Snowflake metadata stored?

Options:

A.  

Within the data files

B.  

In the virtual warehouse layer

C.  

In the cloud services layer

D.  

In the remote storage layer

Discussion 0
Question # 23

A table needs to be loaded. The input data is in JSON format and is a concatenation of multiple JSON documents. The file size is 3 G

B.  

A warehouse size small is being used. The following COPY INTO

command was executed:

COPY INTO SAMPLE FROM @~/SAMPL

E.  

JSON (TYPE=JSON)

The load failed with this error:

Max LOB size (16777216) exceeded, actual size of parsed column is 17894470.

How can this issue be resolved?

Options:

A.  

Compress the file and load the compressed file.

B.  

Split the file into multiple files in the recommended size range (100 MB - 250 MB).

C.  

Use a larger-sized warehouse.

D.  

Set STRIP_OUTER_ARRAY=TRUE in the COPY INTO command.

Discussion 0
Question # 24

What are the responsibilities of Snowflake's Cloud Service layer? (Choose three.)

Options:

A.  

Authentication

B.  

Resource management

C.  

Virtual warehouse caching

D.  

Query parsing and optimization

E.  

Query execution

F.  

Physical storage of micro-partitions

Discussion 0
Question # 25

What is the following SQL command used for?

Select * from table(validate(t1, job_id => '_last'));

Options:

A.  

To validate external table files in table t1 across all sessions

B.  

To validate task SQL statements against table t1 in the last 14 days

C.  

To validate a file for errors before it gets executed using a COPY command

D.  

To return errors from the last executed COPY command into table t1 in the current session

Discussion 0
Question # 26

What types of data listings are available in the Snowflake Data Marketplace? (Choose two.)

Options:

A.  

Reader

B.  

Consumer

C.  

Vendor

D.  

Standard

E.  

Personalized

Discussion 0
Question # 27

Which of the following can be used when unloading data from Snowflake? (Choose two.)

Options:

A.  

When unloading semi-structured data, it is recommended that the STRIP_OUTER_ARRAY option be used.

B.  

Use the ENCODING file format option to change the encoding from the default UTF-8.

C.  

The OBJECT_CONSTRUCT function can be used to convert relational data to semi-structured data.

D.  

By using the SINGLE = TRUE parameter, a single file up to 5 GB in size can be exported to the storage layer.

E.  

Use the PARSE_JSON function to ensure structured data will be unloaded into the VARIANT data type.

Discussion 0
Question # 28

In the Snowflake access control model, which entity owns an object by default?

Options:

A.  

The user who created the object

B.  

The SYSADMIN role

C.  

Ownership depends on the type of object

D.  

The role used to create the object

Discussion 0
Question # 29

What is the SNOWFLAK

E.  

ACCOUNT_USAGE view that contains information about which objects were read by queries within the last 365 days (1 year)?

Options:

A.  

VIEWS_HISTORY

B.  

OBJECT_HISTORY

C.  

ACCESS_HISTORY

D.  

LOGIN_HISTORY

Discussion 0
Question # 30

Which of the following statements apply to Snowflake in terms of security? (Choose two.)

Options:

A.  

Snowflake leverages a Role-Based Access Control (RBAC) model.

B.  

Snowflake requires a user to configure an IAM user to connect to the database.

C.  

All data in Snowflake is encrypted.

D.  

Snowflake can run within a user's own Virtual Private Cloud (VPC).

E.  

All data in Snowflake is compressed.

Discussion 0
Question # 31

Which of the following objects can be directly restored using the UNDROP command? (Choose two.)

Options:

A.  

Schema

B.  

View

C.  

Internal stage

D.  

Table

E.  

User

F.  

Role

Discussion 0
Question # 32

Which of the following accurately describes shares?

Options:

A.  

Tables, secure views, and secure UDFs can be shared

B.  

Shares can be shared

C.  

Data consumers can clone a new table from a share

D.  

Access to a share cannot be revoked once granted

Discussion 0
Question # 33

How many resource monitors can be assigned at the account level?

Options:

A.  

1

B.  

2

C.  

3

D.  

4

Discussion 0
Question # 34

What versions of Snowflake should be used to manage compliance with Personal Identifiable Information (PII) requirements? (Choose two.)

Options:

A.  

Custom Edition

B.  

Virtual Private Snowflake

C.  

Business Critical Edition

D.  

Standard Edition

E.  

Enterprise Edition

Discussion 0
Question # 35

The is the minimum Fail-safe retention time period for transient tables?

Options:

A.  

1 day

B.  

7 days

C.  

12 hours

D.  

0 days

Discussion 0
Question # 36

What COPY INTO SQL command should be used to unload data into multiple files?

Options:

A.  

SINGLE=TRUE

B.  

MULTIPLE=TRUE

C.  

MULTIPLE=FALSE

D.  

SINGLE=FALSE

Discussion 0
Question # 37

For non-materialized views, what column in Information Schema and Account Usage identifies whether a view is secure or not?

Options:

A.  

CHECK_OPTION

B.  

IS_SECURE

C.  

IS_UPDATEABLE

D.  

TABLE_NAME

Discussion 0
Question # 38

Which Snowflake objects can be shared with other Snowflake accounts? (Choose three.)

Options:

A.  

Schemas

B.  

Roles

C.  

Secure Views

D.  

Stored Procedures

E.  

Tables

F.  

Secure User-Defined Functions (UDFs)

Discussion 0
Question # 39

If 3 size Small virtual warehouse is made up of two servers, how many servers make up a Large warehouse?

Options:

A.  

4

B.  

8

C.  

16

D.  

32

Discussion 0
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