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PostgreSQL DBA

No gist provided
Proficiency Level
Beginner-Expert
Experience
0-8 years
Duration
30 mins
WeCP Verified
WeCP
Subject Matter Expert
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Use Case

  • Evaluates PostgreSQL database management and optimization skills.
  • Assesses SQL querying capabilities for data retrieval and analysis.
  • Identifies proficiency in high availability and replication strategies.
  • Measures knowledge of backup and recovery techniques.

Skills Covered

PostgreSQL
Database Management
Performance Tuning
Backup and Recovery
Replication
Security
SQL Query Optimization
+1 more

About

PostgreSQL DBA

No test description provided
Target Audience
No targetAudience provided
Prerequisites
No prerequisites provided
Test Overview
Duration
30 mins
Questions
30
Passing Score
70%

Questions

PostgreSQL Sharding Strategies
AI generated
AI generated
Citus Extension
Database Sharding
Logical Replication
Table Partitioning
What this question evaluates
This question assesses the candidate's knowledge of database sharding strategies, specifically in the context of PostgreSQL. It tests the ability to select effective approaches for sharding to handle increasing data volume and improve performance.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
Lock Contention Strategies
AI generated
AI generated
Database Normalization
Lock Contention Reduction
PostgreSQL Optimization
Query Optimization
What this question evaluates
This question assesses the candidate's knowledge of PostgreSQL database performance optimization, specifically focusing on strategies to reduce lock contention. It evaluates the understanding of row-level locking, database normalization, query optimization, and managing database connections.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
Replication Lag Solutions
AI generated
AI generated
Database Configuration
Performance Optimization
PostgreSQL Clustering
Streaming Replication
What this question evaluates
This question assesses the candidate's knowledge of setting up high availability PostgreSQL clusters with streaming replication and troubleshooting replication lag issues. It evaluates understanding of PostgreSQL configurations, streaming replication, and performance optimization.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
Vacuum Optimization Strategies
AI generated
AI generated
Autovacuum Configuration
Database Performance Tuning
PostgreSQL Optimization
Query Performance Improvement
What this question evaluates
This question assesses the candidate's knowledge of PostgreSQL database optimization strategies, specifically focusing on minimizing the impact of vacuum operations on query performance.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
Database Isolation Levels
AI generated
AI generated
Concurrency
Database Performance
Isolation Levels
Locking Issues
What this question evaluates
This question assesses the candidate's knowledge of database management, specifically focusing on isolation levels in PostgreSQL to optimize read and write operations, minimize locking issues, and improve concurrency.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Database Optimization
AI generated
AI generated
Database Optimization
Indexing
Memory Management
Partitioning
What this question evaluates
This question assesses the candidate's knowledge of database optimization techniques, specifically focusing on reducing I/O wait times in a PostgreSQL database. It evaluates the understanding of query performance, index usage, memory allocation, partitioning, and query logging.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
PostgreSQL Write Tuning
AI generated
AI generated
Configuration Parameters
Database Optimization
Database Performance
PostgreSQL Database Tuning
What this question evaluates
This question assesses the candidate's knowledge of PostgreSQL database tuning for write performance. It evaluates the understanding of configuration parameters related to write performance optimization.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
Autovacuum Optimization
AI generated
AI generated
Autovacuum Processes
Database Optimization
Dead Tuples Management
PostgreSQL Database Maintenance
What this question evaluates
This question assesses the candidate's knowledge of PostgreSQL database maintenance, specifically focusing on autovacuum processes, dead tuples, and optimization techniques.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
Query Performance Optimization
AI generated
AI generated
Configuration Parameter Adjustment
Materialized Views
PostgreSQL Optimization
Query Performance Tuning
What this question evaluates
This question assesses the candidate's knowledge of PostgreSQL database optimization techniques, including query performance tuning, statistics updating, materialized views, and configuration parameter adjustments.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
PITR Backup Methods
AI generated
AI generated
Backup Strategies
Data Availability
Point-in-Time Recovery (PITR)
PostgreSQL Database Management
What this question evaluates
This question assesses the candidate's knowledge of PostgreSQL database management and backup strategies. It tests understanding of consistent point-in-time recovery (PITR) capabilities and the various methods used for data availability.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
Creating Index in PostgreSQL
PostgreSQL
PostgreSQL
Database Management
Index Creation
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Optimizing Query Performance in PostgreSQL
Performance Tuning
Performance Tuning
PostgreSQL
Database Administration
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
PostgreSQL Physical Backup Methods
Backup and Recovery
Backup and Recovery
PostgreSQL
Database Administration
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Logical Replication in PostgreSQL
PostgreSQL
PostgreSQL
Replication
Database Administration
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Securing PostgreSQL Database
Security
Security
PostgreSQL
Database Administration
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Optimizing SQL Queries in PostgreSQL
SQL Query Optimization
SQL Query Optimization
PostgreSQL
Database Administration
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Performance Tuning in PostgreSQL
Database Management
Database Management
PostgreSQL
Tuning
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
PostgreSQL Query Performance Tuning
Database Administration
Database Administration
Performance Tuning
PostgreSQL
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Point-in-Time Recovery in PostgreSQL
Backup and Recovery
Backup and Recovery
PostgreSQL
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Understanding PostgreSQL Logical Replication
PostgreSQL
PostgreSQL
Replication
Database Administration
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
PostgreSQL Security Best Practices
Security
Security
PostgreSQL
Database Administration
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
SQL Query Optimization
SQL
SQL
PostgreSQL
Optimization
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Optimizing Query Performance in PostgreSQL
Database Management
Database Management
PostgreSQL
Query Performance
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Improving PostgreSQL Performance
Database Administration
Database Administration
Performance Tuning
PostgreSQL
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Point-in-Time Recovery in PostgreSQL
Backup and Recovery
Backup and Recovery
PostgreSQL
Database Administration
What this question evaluates
No description provided
Type:
Programming
Difficulty:
Medium
Time:
2 mins
Attempts:
100+
Success Rate:
70.01%
Department Employee Count
Aggregate Functions
Aggregate Functions
Data Retrieval
Joins
Result Ordering
SELECT Query
What this question evaluates
This question tests the candidate's skill in SQL querying, specifically in using aggregate functions and ordering results. It evaluates the candidate's understanding of table relationships and the ability to retrieve data from multiple tables.
Type:
Programming
Difficulty:
Medium
Time:
15 mins
Attempts:
100+
Success Rate:
70.01%
Sum of Product Prices by Manufacturing Date
Aggregate Functions
Aggregate Functions
Calculations
Data Filtering
Data Grouping
SELECT Query
What this question evaluates
This question tests the candidate's skills in SQL query writing and understanding of aggregate functions. It evaluates their ability to filter and group data based on specific conditions, and perform calculations on grouped data.
Type:
Programming
Difficulty:
Medium
Time:
15 mins
Attempts:
100+
Success Rate:
70.01%
Item Price Analysis
Aggregate Functions
Aggregate Functions
Average Calculation
Data Filtering
Data Grouping
SELECT Query
What this question evaluates
This question tests the candidate's skills in SQL query writing and understanding of aggregate functions. It evaluates the candidate's ability to calculate average, filter data based on conditions, and group data based on a specific column.
Type:
Programming
Difficulty:
Medium
Time:
15 mins
Attempts:
100+
Success Rate:
70.01%
Expensive Product Details
Column Selection
Column Selection
Data Filtering
Database Manipulation
Nested Queries
SELECT Query
What this question evaluates
This question tests the candidate's skills in SQL queries and database manipulation. It evaluates the candidate's understanding of table joins, filtering data based on conditions, and retrieving specific columns from multiple tables.
Type:
Programming
Difficulty:
Medium
Time:
15 mins
Attempts:
100+
Success Rate:
70.01%
Car Purchase Query
Data Filtering
Data Filtering
Data Retrieval
Database Querying
Joins
SQL Syntax
What this question evaluates
This question assesses the candidate's SQL skills in querying a database to retrieve specific information. It tests their understanding of filtering data based on a specific condition and joining multiple tables to retrieve relevant information.
Type:
Programming
Difficulty:
Medium
Time:
15 mins
Attempts:
100+
Success Rate:
70.01%
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Dashboard mockup
Sofia Rossi
Candidate
Passed
85%
AI Summary
Skills Performance
Score
PostgreSQL
87%
Database Management
80%
Performance Tuning
85%
Backup and Recovery
82%
Areas of Improvement
Review
Backup and Recovery
Practice
Database Management
Skill Assessment
Detailed evaluation of technical skills and problem-solving abilities.
AI Analysis
Machine learning-powered insights into candidate performance patterns.
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