Swift (Coding): Debugging Test

The Swift (Coding): Debugging Test evaluates a candidate's ability to identify and fix various kinds of bugs in Swift code. The test assesses knowledge through scenario-based MCQs and coding questions, focusing on syntax and logical errors, compiler warnings, and best debugging practices. Ideal for roles requiring Swift expertise and problem-solving skills.

Covered skills:

Syntax Errors
Logical Errors
Runtime Errors
Compiler Warnings
Code Refactoring
Debugging Techniques
Xcode Debugger Tools
Unit Testing
Memory Management
Error Handling

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About the Swift (Coding): Debugging Assessment Test

The Swift (Coding): Debugging Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

Proficient in identifying and correcting syntax errors in Swift code
Able to detect and fix logical errors to ensure correct program behavior
Capable of diagnosing runtime errors and utilizing debugging tools to fix them
Skilled in interpreting and resolving compiler warnings
Experienced in refactoring code for improved performance and readability
Adept at using Xcode debugger tools effectively
Competent in writing and executing unit tests to validate code functionality
Efficient in managing memory to prevent leaks and ensure optimal performance
Able to handle exceptions and errors gracefully within Swift applications
Understanding of best practices for debugging and troubleshooting
Knowledgeable in optimizing Swift code for better performance
Experienced with functional and automated testing procedures

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Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 15,000+ questions. The actual questions on this Swift (Coding): Debugging Test will be non-googleable.

🧐 Question
Medium Data Provider DispatchQueue Closures Asychronous operations.	Solve
Consider the following code snippet: What will be printed after the code execution?
Medium Property Observers OOPs	Solve
Consider the following Swift code snippet: What does the code print after execution? A) 800, -100, 80, 80 B) 800, 800, 80, 72 C) 1000, 800, 100, 72 D) 800, 800, 80, 80 E) 800, 0, 80, 80
Medium Class Destructor OOPs Memory Management Object-oriented Programming	Solve
What does the following Swift code output?
Easy Defer blocks	Solve
What does the following Swift code output?
Easy Lazy Variables	Solve
What does the following Swift code output?

	🧐 Question	🔧 Skill
	Medium Data Provider DispatchQueue Closures Asychronous operations.	3 mins Swift	Solve
Consider the following code snippet: What will be printed after the code execution?
	Medium Property Observers OOPs	2 mins Swift	Solve
Consider the following Swift code snippet: What does the code print after execution? A) 800, -100, 80, 80 B) 800, 800, 80, 72 C) 1000, 800, 100, 72 D) 800, 800, 80, 80 E) 800, 0, 80, 80
	Medium Class Destructor OOPs Memory Management Object-oriented Programming	2 mins Swift	Solve
What does the following Swift code output?
	Easy Defer blocks	2 mins Swift	Solve
What does the following Swift code output?
	Easy Lazy Variables	2 mins Swift	Solve
What does the following Swift code output?

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Data Provider DispatchQueue Closures Asychronous operations.	Swift	Medium	3 mins	Solve
Consider the following code snippet: What will be printed after the code execution?
	Property Observers OOPs	Swift	Medium	2 mins	Solve
Consider the following Swift code snippet: What does the code print after execution? A) 800, -100, 80, 80 B) 800, 800, 80, 72 C) 1000, 800, 100, 72 D) 800, 800, 80, 80 E) 800, 0, 80, 80
	Class Destructor OOPs Memory Management Object-oriented Programming	Swift	Medium	2 mins	Solve
What does the following Swift code output?
	Defer blocks	Swift	Easy	2 mins	Solve
What does the following Swift code output?
	Lazy Variables	Swift	Easy	2 mins	Solve
What does the following Swift code output?

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Why you should use Pre-employment Swift (Coding): Debugging Test?

The Swift (Coding): Debugging 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:

Identifying and fixing syntax errors in Swift code
Debugging logical errors in Swift applications
Resolving runtime errors in Swift programs
Addressing compiler warnings in Swift projects
Refactoring Swift code for improved efficiency
Applying various debugging techniques in Swift
Utilizing Xcode debugger tools effectively
Implementing unit tests for Swift code
Managing memory in Swift applications
Handling exceptions and errors in Swift

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.

What topics are covered in the Swift (Coding): Debugging Test?

Syntax Errors: Syntax errors occur when the code does not conform to the rules of the programming language, causing the compiler to throw errors. Identifying and fixing these errors is crucial for successful code compilation.

Logical Errors: Logical errors are flaws in the program's algorithm that cause it to produce incorrect results. Understanding the root cause of logical errors is essential for delivering functional software.

Runtime Errors: Runtime errors emerge when the code is executed and can cause the program to crash or behave unexpectedly. Detecting and handling these errors ensures the robustness of the application.

Compiler Warnings: Compiler warnings indicate potential issues in the code that can lead to errors or suboptimal performance. Addressing these warnings preemptively can improve code quality and prevent future bugs.

Code Refactoring: Code refactoring involves restructuring existing code without changing its behavior to improve readability, maintainability, and performance. Consistently refactoring code can help in sustaining long-term project health.

Debugging Techniques: Debugging techniques encompass various methods and strategies for identifying, analyzing, and fixing bugs in the code. Mastery of these techniques is pivotal for swift and effective problem resolution.

Xcode Debugger Tools: Xcode's integrated debugger tools, including breakpoints and memory graphs, provide developers with powerful means to inspect and manage code execution. Proficiency with these tools is key to efficient iOS and macOS development.

Unit Testing: Unit testing involves writing tests for individual units of code to ensure they work as intended. Implementing unit tests helps catch bugs early and facilitates reliable code changes.

Memory Management: Memory management in Swift, primarily handled by Automatic Reference Counting (ARC), is critical for preventing leaks and ensuring efficient resource use. Proper memory management directly impacts application performance and stability.

Error Handling: Error handling mechanisms, such as Swift’s do-catch blocks and optional chaining, enable graceful management of potential failures. Implementing robust error handling enhances user experience and prevents crashes.

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 Swift (Coding): Debugging Test to be based on.

Syntax highlighting

Keywords

Variables

Constants

Data types

Control flow

Loops

Functions

Closures

Enumerations

Optionals

Error handling

Structs

Classes

Inheritance

Protocols

Extensions

Generics

Type inference

Type casting

Mutability

Array

Dictionary

Set

Tuple

Higher-order functions

Memory leaks

ARC

Strong reference cycle

Weak references

Lazy properties

Xcode breakpoints

LLDB

Debug navigator

Stack trace

Code coverage

Unit tests

XCTest

Mocking

Asynchronous testing

TDD

Performance tests

Compile-time errors

Linker errors

Runtime exceptions

Build phases

Build settings

Profiling

Instrumentation

Dynamic libraries

Static libraries

What roles can I use the Swift (Coding): Debugging Test for?

iOS Developer
Software Engineer
Mobile App Developer
Swift Developer
Backend Developer
Application Developer
Full Stack Developer
QA Engineer
Technical Lead
Software Architect

How is the Swift (Coding): Debugging Test customized for senior candidates?

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

Optimizing Swift code performance
Debugging multi-threaded Swift applications
Profiling Swift code for memory leaks
Implementing advanced error handling patterns
Debugging network-related issues in Swift
Resolving UI-related bugs in Swift applications
Debugging Core Data integration issues
Optimizing Swift compile times
Resolving compatibility issues across Swift versions
Debugging complex data structures in Swift

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

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Have questions about the Swift (Coding): Debugging Hiring Test?

What is Swift (Coding): Debugging Test?

The Swift (Coding): Debugging Test assesses a candidate's debugging skills in Swift. It is used by recruiters to identify candidates who can effectively find and fix bugs in Swift code.

Can I combine the Swift (Coding): Debugging Test with SQL questions?

Yes, you can request a custom test that combines Swift debugging with SQL skills. For more details on assessing SQL skills, check the SQL Online Test.

What topics are covered in the Swift (Coding): Debugging Test?

The test covers:

Syntax Errors
Logical Errors
Runtime Errors
Code Refactoring
Debugging Techniques
Xcode Debugger Tools
Unit Testing
Memory Management
Error Handling

How to use Swift (Coding): Debugging Test in my hiring process?

Use our assessment as a pre-screening tool. Add a link to the assessment in your job post or invite candidates directly via email. This helps find skilled candidates faster.

What are the main coding tests?

Other important coding tests:

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

Non-googleable questions
IP proctoring
Screen proctoring
Web proctoring
Webcam proctoring
Plagiarism detection
Secure browser
Copy paste protection

Read more about the proctoring features.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

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Along with scorecards that report the performance of the candidate in detail, you also receive a comparative analysis against the company average and industry standards.

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