coding-exercises
JDK
coding-exercises | JDK | |
---|---|---|
4 | 193 | |
426 | 18,442 | |
1.6% | 1.4% | |
3.7 | 10.0 | |
about 1 month ago | 5 days ago | |
Java | ||
- | GNU General Public License v3.0 only |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
coding-exercises
-
We compiled a free library of ~150 realistic eng take-home tests and ranked them
- You don't have code to show, 1 hour live coding challenge, focus on communication, search want you want online, ask us any questions, and explain what you're doing.
We out of about 40 live coding interviewes this year, one person refused the live challenge, 11 passed this stage, and we ended up with 7 hires accepting the offer.
If you lack inspiration, use this: https://github.com/guardian/coding-exercises
-
General Question about Starting to Code
If you can't think of something to do, there are the Guardian Coding Exercises which just outline a problem to be solved
-
Stop using tools as if they were solutions
I also recommend having a look at the Guardian Coding Exercises and to read the description of the repository. I think they are a good example of tests that allow the candidate and the interviewer to work together, to actually meet and to discuss a solution. There is no "right" way to solve them, and many of them cannot be solved in 45 minutes, which is usually the time given to a candidate after an initial introductory chat.
- I failed 3 candidates. Is my interview question fair?
JDK
- Intel submitted OpenJDK PRs for supporting new 64 bit general purpose registers
-
Show HN: I Built a Java IDE for iPad
I felt out of the loop, thinking that Zero VM was some kind of new distro for OpenJDK but chasing <https://packages.debian.org/sid/openjdk-22-jre-zero#:~:text=...> to <https://sources.debian.org/src/openjdk-11/11.0.23%2B9-1/debi...> lead me to https://github.com/openjdk/jdk/tree/jdk-22-ga/src/hotspot/cp...
It seems that it's a specific CPU target for the Hotspot JIT for non-mainstream architectures (or for research purposes, as I saw mentioned once)
- JEP draft: Exception handling in switch
-
Java 23: The New Features Are Officially Announced
Completely gutted from the OpenJDK, last I checked. See here for the culprit PR: https://github.com/openjdk/jdk/pull/18688
-
macOS 14.4 might break Java on your machine
> Yes, they're changing one aspect of signal handler use to work around this problem. They're not stopping the use of signal handlers in general. Hotspot continues to use signals for efficiency in general. See https://github.com/openjdk/jdk/blob/9059727df135dc90311bd476...
This whole thread is about SIGSEGV, and specifically their SIGSEGV handling. However, catching normal signals is not about efficiency.
Some of their exception handling is still odd: There is no reason for a program that receives SIGILL to ever attempt continuing. But others is fine, like catching SIGFPE to just forward an exception to the calling code.
(Sure, you could construct an argument to say that this is for efficiency if you considered the alternative to be implementing floating point in software so that all exceptions exist in user-space, but hardware floating point is the norm and such alternative would be wholly unreasonable.)
> The wonderful thing about choosing not to care about facts is having whatever opinions you want.
I appreciate the irony of you making such statement, proudly thinking that your opinion equals fact, and therefore any other opinion is not.
This discussion is nothing but subjective opinion vs. subjective opinion. Facts are (hopefully, as I can only speak for myself) inputs to both our opinions, but no opinion about "good" or "bad", "nasty" or not can ever be objective. Objective code quality does not exist.
-
The Return of the Frame Pointers
I remember talking to Brendan about the PreserveFramePointer patch during my first months at Netflix in 2015. As of JDK 21, unfortunately it is no longer a general purpose solution for the JVM, because it prevents a fast path being taken for stack thawing for virtual threads: https://github.com/openjdk/jdk/blob/d32ce65781c1d7815a69ceac...
- JDK-8180450: secondary_super_cache does not scale well
- The One Billion Row Challenge
- AVX2 intrinsics for Arrays.sort methods (int, float arrays)
- A gentle introduction to two's complement
What are some alternatives?
Graal - GraalVM compiles Java applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀
aircraft - The A32NX & A380X Project are community driven open source projects to create free Airbus aircraft in Microsoft Flight Simulator that are as close to reality as possible.
steam-runtime - A runtime environment for Steam applications
OkHttp - Square’s meticulous HTTP client for the JVM, Android, and GraalVM.
kitten - A statically typed concatenative systems programming language.
intellij-community - IntelliJ IDEA Community Edition & IntelliJ Platform
imagepipe - Image processing pipeline
Caffeine - A high performance caching library for Java
V8 - The official mirror of the V8 Git repository
corretto-11 - Amazon Corretto 11 is a no-cost, multi-platform, production-ready distribution of OpenJDK 11
Kotest - Powerful, elegant and flexible test framework for Kotlin with additional assertions, property testing and data driven testing
jmc - Repository for OpenJDK Mission Control, a production time profiling and diagnostics tools suite. https://openjdk.org/projects/jmc