PostgreSQL PGCES-02 Exam Questions Answers

PostgreSQL PGCES-02 Study Questions for Exam 2026

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Page: 1 / 29
Total Questions: 142

Questions & Answers PDF

• Question 1

  

  The present time is noon of July 7th, 2007, and the result of the following SQL sentence was '2007- 07-17 12:00:00'. Select the correct expression to fill in the blank below. SELECT CURRENT_TIMESTAMP::timestamp + ;

  • '10 day'::timestamp
  • '10 day'::interval
  • 10::day
  • 8640000::time
  • age(8640000)

  Reveal Answer Answer: B Next Question

• Question 2

  

  A set of tables are defined as follows: t1 t2 How many rows are returned by executing the following SQL statement? SELECT t1.name FROM t1 CROSS JOIN t2;

  • 0 rows
  • 2 rows
  • 3 rows
  • 5 rows
  • 6 rows

  Reveal Answer Answer: E Next Question

• Question 3

  

  Select the correct SQL statement to define a new data type.

  • CREATE CLASS
  • CREATE FUNCTION
  • CREATE OPERATOR
  • CREATE DATABASE
  • CREATE TYPE

  Reveal Answer Answer: E Next Question

• Question 4

  

  Select two suitable statements regarding the data types of PostgreSQL.

  • One field can handle up to 1GB of data.
  • 'n' in CHARACTER(n) represents the number of bytes.
  • Only the INTEGER type can be declared as an array.
  • There is a non-standard PostgreSQL data type, called Geometric data type, which handles 2dimensional data.
  • A large object data type can be used to store data of unlimited size.

  Reveal Answer Answer: A, ,D Next Question

• Question 5

  

  Table "t1" is defined as follows: CREATE TABLE t1 (value VARCHAR(5)); A set of SQL statements were executed in the following order. Select the number of rows that table "t1" has after execution. BEGIN; INSERT INTO t1 VALUES ('AA'); SAVEPOINT point1; INSERT INTO t1 VALUES ('BB'); SAVEPOINT point2; INSERT INTO t1 VALUES ('CC'); ROLLBACK TO point1; INSERT INTO t1 VALUES ('DD'); END;

  • 1 row
  • 2 rows
  • 3 rows
  • 4 rows
  • 0 rows

  Reveal Answer Answer: B Next Question

• Question 6

  

  psql generated the following error message: psql: could not connect to server: Connection was refused Is the server running on host "server.example.com" and accepting TCP/IP connections on port 5432? Select two reasons that are NOT the cause of this error.

  • Host "server.example.com" does not exist.
  • The PostgreSQL server is not running on "server.example.com".
  • The PostgreSQL server is not accepting TCP/IP connections on "server.example.com".
  • The PostgreSQL server is running on a port other than 5432 on "server.example.com".
  • The username and/or password are incorrect.

  Reveal Answer Answer: A, ,E Next Question

• Question 7

  

  Configuration file pg_hda.conf is set as below on a host currently running PostgreSQL. local all trust host all 192.168.1.0/24 reject host all 192.168.0.0/16 trust Select a host IP address which is authorized to connect to this database via the network. Note:INET domain socket communication is available.

  • 127.0.0.1
  • 192.168.1.1
  • 192.168.0.1
  • 192.168.1.0
  • None can be connected.

  Reveal Answer Answer: C Next Question

• Question 8

  

  Select one option which cannot be specified using createdb.

  • Database locale
  • Character encoding
  • Host name
  • Database owner
  • Template database

  Reveal Answer Answer: A Next Question

• Question 9

  

  I would like to set the default character encoding for the client to Unicode. Select the most appropriate configuration parameter in postgresql.conf from those below.

  • backend_encoding = UNICODE
  • frontend_encoding = UNICODE
  • client_encoding = UNICODE
  • default_encoding = UTF8
  • encoding = UTF8

  Reveal Answer Answer: C Next Question

• Question 10

  

  Select one incorrect description regarding the following SQL statement defining a function.CREATE OR REPLACE FUNCTION get_file_list(TEXT, BOOLEAN) RETURNS SETOF TEXT LANGUAGE C STRICT SECURITY DEFINER AS 'myfuncs.so';

  • This function may be defined in 'myfuncs.so'.
  • This function can return multiple rows.
  • This SQL statement defines a function written in the C language.
  • If this function is called with a NULL parameter, it will return 0 when executed.
  • This function operates with the authority of the user who executed it.

  Reveal Answer Answer: E Next Question

Page: 1 / 29
Total Questions: 142

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