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SQL Assessment Test

This SQL test evaluates foundational knowledge and practical skills in SQL, essential for roles in data management and backend development. It covers querying, data manipulation, and database design, ensuring candidates can efficiently handle data-driven tasks.

Proficiency Level
Beginner-Expert
Experience
0-8 years
Duration
35 mins
WeCP Verified
WeCP
Subject Matter Expert
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Use Case

  • Evaluates SQL query writing and data filtering skills.
  • Assesses understanding of SQL functions and error handling.
  • Tests competence in crafting efficient, optimized SQL queries.
  • Identifies candidates’ proficiency in advanced SQL concepts and operations.

Skills Covered

SQL
L2
IT-Programming Languages/Frameworks
Medium
MCQs(Single Correct)
SELECT- STRING OPERATIONS
Verified
+11 more

About

SQL Assessment Test

This SQL test is designed to assess the fundamental skills and knowledge required for roles involving data management and backend development. It evaluates the candidate's ability to write and optimize SQL queries, perform data manipulation, and understand database design principles. The test ensures that candidates can efficiently handle data-driven tasks and contribute effectively to projects requiring SQL expertise. It is an essential tool for employers looking to validate the SQL capabilities of potential hires, ensuring they possess the necessary skills to manage and analyze data effectively.

Target Audience

This assessment is suitable for roles such as Backend Developer, Data Scientist, and Machine Learning Engineer.

Prerequisites
  • Basic understanding of database concepts
  • Familiarity with SQL syntax and commands
  • Ability to write simple to complex SQL queries
  • Knowledge of data manipulation techniques
  • Understanding of database design and normalization
  • Experience with SQL-based database management systems
  • Problem-solving skills related to data extraction and analysis
Test Overview
Duration
35 mins
Questions
11
Passing Score
70%

Questions

Listing the names movie reviewers
SQL
SQL
SQL Joins
SELECT Query
L2
Medium
What this question evaluates
This question assesses the candidate's skill in writing SQL queries to filter data based on specific conditions and display distinct values. It tests the understanding of SQL syntax, filtering criteria, and retrieving unique values from a database.
Type:
Programming
Difficulty:
Medium
Time:
15 mins
Attempts:
100+
Success Rate:
70.01%
Using the LOAD_FILE function
L2
L2
SELECT- STRING OPERATIONS
SQL
What this question evaluates
This question assesses the candidate's understanding of file operations and handling errors. It tests their ability to identify when a function will return NULL based on different conditions.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Using the DENSE_RANK function
DENSE RANK
DENSE RANK
L2
SQL
What this question evaluates
This question evaluates the candidate's understanding of SQL and specifically the DENSE_RANK() function. It requires knowledge of ranking functions in SQL and how they can be used to sort and rank data based on specified criteria.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
SQL Query Efficiency Evaluation
Ability to analyze SQL code
Ability to analyze SQL code
Database performance optimization
Relational database concepts
SQL query design
Understanding of one-to-many relations
What this question evaluates
This question probes the candidate's comprehension of SQL relational database principles, particularly effective query design. It requests the candidate to identify efficient strategies for retrieving distinct elements in a one-to-many relationship scenario.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
Rank products in each category
Data Manipulation
Data Manipulation
Partitioning
Query Analysis
Ranking Functions
Window Functions
What this question evaluates
This question tests the candidate's understanding of SQL queries, specifically on window functions, ranking, and partitioning. It evaluates the ability to select the correct ranking function for the given scenario.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Index Deletion Prerequisites
Data Dictionary
Data Dictionary
Database privileges
Database user roles
Indexing
Problem-solving
What this question evaluates
This question probes the candidate's understanding of data dictionary and indexing, particularly the prerequisites needed for dropping an index. It assesses the candidate's grasp of database access privileges and user roles.
Type:
Programming
Difficulty:
Medium
Time:
0.75 mins
Attempts:
100+
Success Rate:
70.01%
Retrieving a list of patients
Aggregate Functions
Aggregate Functions
Filtering Conditions
L3
SELECT statement
Subtraction of Dates
What this question evaluates
This question evaluates the candidate's ability to craft SQL queries, specifically focusing on table joins, aggregate functions, and filtering results using conditions.
Type:
Programming
Difficulty:
Medium
Time:
1.25 mins
Attempts:
100+
Success Rate:
70.01%
Using the LAG function
Analytical Functions
Analytical Functions
Data Analysis
LAG
PARTITION BY
Salary Calculation
What this question evaluates
This question tests the candidate's knowledge of SQL syntax and analytical functions, especially involving LAG and PARTITION BY, to analyze salary data across years for employees.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Obtain the details of products
Databases
Databases
Normalization
Query Optimization
Relational Database Management Systems
Table Joins
What this question evaluates
This question evaluates the candidate's understanding of SQL syntax and query formulation, particularly in the context of table joins and fetching related data from multiple tables.
Type:
Programming
Difficulty:
Medium
Time:
0.75 mins
Attempts:
100+
Success Rate:
70.01%
Understanding the EXCEPT Operator in SQL
Data Types
Data Types
EXCEPT Operator
Query Optimization
SQL
Schema Design
What this question evaluates
This question evaluates the candidate's understanding of database query operations, specifically the EXCEPT operator, focusing on determination of resulting column names and data types in various scenarios.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Running a query with another column
Analytical Window Functions
Analytical Window Functions
Column Manipulation
LAG Function
LEAD Function
Query Syntax
What this question evaluates
This question tests the candidate's knowledge of SQL querying, specifically focusing on the use of analytical window functions like LAG and LEAD, as well as understanding the correct syntax for composing such queries.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
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Interactive coding environment with real-time feedback
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Dashboard mockup
Ahmed Hassan
Candidate
Passed
85%
AI Summary
Skills Performance
Score
SQL
87%
L2
80%
IT-Programming Languages/Frameworks
85%
Medium
82%
Areas of Improvement
Review
Medium
Practice
L2
Skill Assessment
Detailed evaluation of technical skills and problem-solving abilities.
AI Analysis
Machine learning-powered insights into candidate performance patterns.
Benchmarking
Compare results against industry standards and other candidates.
Action Items
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10 credits / mo + 1 seat
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ATS Integrations
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Standard support from WeCP Team
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60 credits / yr
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Skill fit candidates
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Conduct face to face interviews
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ATS Integrations
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Standard compliance, security and audits
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Premium
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500 credits / yr
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Add-on credit at $8 /credit
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Comprehensive Assessment Capabilities
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Advance Skill Analytics
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Learning & Development Integration
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Employee Friendly User Experience
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Retention-Focused Features
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Advance compliance, security and audits
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Proactive support from WeCP Team
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Access to WeCP AI Copilot to save cost, time and improve outcomes
Enterprise
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