LINQ Online Test

The LINQ Online Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

• Understanding and implementing Query Expressions
• Applying Lambda Expressions for efficient data manipulation
• Utilizing Standard Query Operators for filtering and sorting
• Understanding Deferred Execution and its impact on performance
• Performing Join Operations for integrating multiple data sources
• Applying Aggregation functions for summarizing data
• Implementing Grouping for organizing data based on specific criteria
• Sorting data using multiple criteria
• Filtering data based on specific conditions
• Performing Data Transformation to convert data into desired formats

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

• Query Expressions

  Query expressions in LINQ provide a convenient way to write queries by using a SQL-like syntax. They allow developers to retrieve and manipulate data from various data sources effortlessly.

• Lambda Expressions

  Lambda expressions are concise and powerful ways to write inline functions. These allow developers to create and use small, anonymous functions that can be used in LINQ queries for filtering, sorting, or transforming data more efficiently.

• Standard Query Operators

  Standard Query Operators are predefined methods that provide a set of commonly used query operations in LINQ. These operators facilitate tasks such as filtering, projecting, sorting, aggregating, and joining data in a more structured and readable manner.

• Deferred Execution

  Deferred execution is a feature of LINQ that postpones the actual execution of a query until the data is actually requested. This allows optimization and laziness in the execution of the query, resulting in better performance and memory management.

• Join Operations

  Join operations in LINQ allow developers to combine data from multiple sources based on specified conditions. This skill is important to measure as it enables the assessment of a candidate's ability to write complex queries involving multiple tables or data sources.

• Aggregation

  Aggregation in LINQ involves calculating a single value from a collection of values. This skill is important to measure as it demonstrates a candidate's understanding of performing calculations and summarizing data efficiently.

• Grouping

  Grouping in LINQ allows developers to categorize data based on common attributes or values. This skill is important to measure as it reflects a candidate's ability to organize and analyze data in a structured and meaningful way.

• Sorting

  Sorting in LINQ involves arranging data in a specific order based on one or more criteria. This skill is important to measure as it indicates a candidate's ability to retrieve and present data in a desired sequence, which is often crucial in data analysis and reporting.

• Filtering

  Filtering in LINQ refers to the process of selecting specific elements from a collection based on specified conditions. This skill is important to measure as it demonstrates a candidate's ability to extract and retrieve relevant data, which is fundamental in data manipulation and analysis.

• Data Transformation

  Data transformation in LINQ involves converting data from one form to another, often by applying various operations or functions. This skill is important to measure as it reflects a candidate's ability to manipulate and modify data in different ways to meet specific requirements and goals.

• Full list of covered topics

  The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for LINQ Online Test to be based on.

  Basic LINQ Syntax

  Query Syntax vs Method Syntax

  Filtering Data with LINQ

  Sorting Data with LINQ

  Grouping Data with LINQ

  Aggregating Data with LINQ

  Joining Data with LINQ

  Lambda Expressions

  Deferred Execution and Immediate Execution

  Standard Query Operators - Where

  Standard Query Operators - Select

  Standard Query Operators - OrderBy

  Standard Query Operators - GroupBy

  Standard Query Operators - Join

  Standard Query Operators - Aggregate

  Standard Query Operators - Distinct

  Standard Query Operators - Any, All, Contains

  Standard Query Operators - Skip, Take

  Standard Query Operators - Union, Intersect, Except

  Standard Query Operators - Concat, Zip

  Data Transformation - Select, SelectMany

  Data Transformation - GroupBy, ToLookup

  Data Transformation - Into

  Data Transformation - Cast, OfType, AsQueryable

  Data Transformation - Where + Select

  Data Transformation - OrderBy + ThenBy

  Data Transformation - Join + GroupJoin

  Data Transformation - Skip + Take

  Deferred Execution - Lazy Loading

  Deferred Execution - Eager Loading

  Deferred Execution - ToList, ToArray, ToDictionary

  Deferred Execution - Count, Average, Min, Max, Sum

  Deferred Execution - First, FirstOrDefault, Last, LastOrDefault

  Deferred Execution - Any, All

  Deferred Execution - Contains

  Dot Notation vs Query Syntax

  Method Syntax Chaining

  Anonymous Types in LINQ

  Nullable Types in LINQ

  Using LINQ with Collections

  Using LINQ with SQL Queries

  Combining LINQ with Other Techniques

  Performance Optimization of LINQ Queries

  Tips and Best Practices for LINQ

  LINQ Error Handling and Exception Handling

  LINQ Query Optimization

  Performance Comparison of Different LINQ Operators

  Working with Complex Data Structures

  LINQ Integration with Entity Framework

  LINQ Integration with WPF and WinForms

  LINQ Integration with ASP.NET MVC

  LINQ Integration with ASP.NET Web API

  LINQ Integration with Xamarin

  LINQ Integration with Unity

  LINQ Integration with Microsoft Azure

  LINQ Integration with MongoDB

  LINQ Integration with SQL Server

  LINQ Integration with Oracle Database

  LINQ Integration with MySQL

  LINQ Integration with PostgreSQL

  LINQ Integration with SQLite

• LINQ Designer
• C# .NET Developer
• .NET Architect

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

• Utilizing LINQ functions for querying databases
• Optimizing LINQ queries for improved performance
• Understanding and implementing advanced LINQ features
• Applying LINQ to XML for querying and manipulating XML documents
• Using LINQ to Objects for querying in-memory collections
• Utilizing LINQ to SQL for database querying and mapping
• Implementing LINQ to Entities for querying and working with entity data models
• Applying LINQ to DataSet for querying and manipulating relational data
• Understanding LINQ expressions and query syntax
• Applying LINQ for data analysis and reporting