Most Recent PostgreSQL PGCES-02 Exam Questions & Answers

Prepare for the PostgreSQL CE 8 Silver exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.

QA4Exam focus on the latest syllabus and exam objectives, our practice Q&A are designed to help you identify key topics and solidify your understanding. By focusing on the core curriculum, These Questions & Answers helps you cover all the essential topics, ensuring you're well-prepared for every section of the exam. Each question comes with a detailed explanation, offering valuable insights and helping you to learn from your mistakes. Whether you're looking to assess your progress or dive deeper into complex topics, our updated Q&A will provide the support you need to confidently approach the PostgreSQL PGCES-02 exam and achieve success.

The questions for PGCES-02 were last updated on Nov 21, 2024.

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Question No. 1

Select one incorrect statement about the SQL COPY command.

AIt copies data between a file and a table.

BYou can output the row data of a table to a specified client side file.

CCopies row data from a file into a table.

DOnly the superuser can specify the output file name.

EThe delimiter that separates column data can be changed from the default TAB character.

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Correct Answer: B

Question No. 2

PostgreSQL can use an index to access a table. Select two incorrect statements about indexes.

AAn index is created by 'CREATE INDEX', and deleted by 'DROP INDEX'.

BBy using an index effectively, searching and sorting performs faster.

CThere are B-tree, Hash, R-tree and GiST index types.

DBy creating an index, performance always improves.

ECreating an unused index does not affect the performance of a database at all.

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Correct Answer: D, E

Question No. 3

From the SQL commands below, select one that is generally classified as "DDL".

ASTART TRANSACTION

BCREATE TABLE

CSELECT

DINSERT

EDELETE

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Correct Answer: B

Question No. 4

A table and view are defined as follows: CREATE TABLE item (id INT, name TEXT, description TEXT); CREATE VIEW item_simple AS SELECT id, name FROM item;

A set of SQL statements were executed in the order below. Select the most appropriate statement concerning the execution results. BEGIN; SELECT * FROM item_simple;

INSERT INTO item_simple VALUES (1, 'item_name_1'); UPDATE item_simple SET name = 'item_name_2' WHERE id = 1; DELETE FROM item_simple; END;

AAn error is generated at the point the SELECT statement is executed.

BAn error is generated at the point the INSERT statement is executed.

CAn error is generated at the point the UPDATE statement is executed.

DAn error is generated at the point the DELETE statement is executed.

ENo error is generated.

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Correct Answer: B

Question No. 5

In the "customer" table, you want to change the "email" values which have an "id" value of 10000 or less, to NULL. Select the correct SQL statement to achieve this task.

AUPDATE email = NULL FROM customer WHERE id <= 10000;

BUPDATE customer SET email IS NULL WHERE id < 10001;

CUPDATE customer SET email = NULL WHERE id <= 10000;

DDELETE FROM customer.email WHERE id < 10001;

EUPDATE FROM customer SET email = NULL WHERE id <= 10000;

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Correct Answer: C

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