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Attempted questions, problems, quizzes, and roadmap resources in 2026

Contribution Graph for 2026
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Less
More
Correct
418
Incorrect
112

Computer Architecture

4/61

Networking

1/96

Language Knowledge

418/710

Design Patterns

2/20

Concurrency

63/78

Operating Systems

42/103

Data

0/0

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Distinguished
Tier 7 of 11
Total XP
332,036
167,964 XP to Fellow33%
Them
20
Their rank
Score
276
Roughly Correct - Incorrect
Grinders
110898
Users with submissions
Strugglers
101159
Negative score users
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0.02%
User

Recently Completed

TitleStatusDate
Base my bounds6/28/2026
Virtual address structure6/28/2026
Kcats6/28/2026
That's BS!6/28/2026
Top of the stack6/28/2026
They're stacked.6/28/2026
Can you treat me as an equal?6/28/2026
Before main()6/28/2026
After main()6/28/2026
Split segments6/27/2026
Weighing Jobs6/27/2026
Linux CFS6/27/2026
Linux, what are you using?6/27/2026
How are jobs stored?6/27/2026
Pay your fair share.6/27/2026
Ding ding ding!6/27/2026
Speak the language.6/27/2026
Simple system call overhead6/27/2026
Job Scheduling6/27/2026
Uncontrolled scheduling6/27/2026
P switch T switch.6/27/2026
It's our time!6/16/2026
Scheduler Trade-offs6/16/2026
Why an OS?6/16/2026
Interrupting an interrupt.6/16/2026
The OS Monarch6/16/2026
But how do it do?6/16/2026
Process Control Block6/14/2026
Process States6/14/2026
Clean up the thread6/14/2026
The birth of the process6/14/2026
Join me6/14/2026
Uhhhh, it's gone.6/13/2026
How do I test ts 2?6/13/2026
Wait on what?6/13/2026
Accumulate?6/13/2026
Is z on fire?6/13/2026
Why must you always try to be unique?6/13/2026
I only did it!6/13/2026
Whose next?6/13/2026
But why?6/13/2026
How many homes on this block?6/13/2026
Double-up.6/13/2026
What's your problem?6/13/2026
A big slice?6/13/2026
A sublte bug.6/13/2026
I didn't know you were that big...6/13/2026
They rarely touch me.6/13/2026
Update this for me.6/13/2026
Stop failing on me!6/13/2026
I'm relaxing.6/13/2026
We made some changes.6/13/2026
Lets do this!6/13/2026
How do I test ts 1?6/12/2026
Workload Distribution6/12/2026
How many kids do I want?6/11/2026
Peas in a pod.6/8/2026
Cache Coherence 6/8/2026
Cache Coherence Optimization6/8/2026
Amdahl's Law Application6/8/2026
Lock Free vs Wait Free6/8/2026
ABA Problem in Lock-free Code6/8/2026
Lock-free Memory Management6/7/2026
What pointer?6/7/2026
Spin wars6/7/2026
Are they always like this?6/6/2026
We're both from the future!5/26/2026
Cross-thread Exception Handling5/26/2026
Async surprise party5/26/2026
Wait, I'm sleeping5/26/2026
A onephore5/26/2026
How fine is the grain?5/25/2026
Something is wrong.5/25/2026
A thread-safe stack.5/25/2026
Locking Granularity Tradeoffs5/23/2026
Locked up, they won't let me out.5/23/2026
Accumulate it all in parallel.5/23/2026
Parallel pitfalls5/23/2026
No progress.5/23/2026
You're not part of our group.5/21/2026
Spin what lock?5/21/2026
Hey, I'm waiting to be unlocked.5/21/2026
How does it mutex?5/20/2026
Bypass the mutex, or not?5/20/2026
What am I guarding?5/20/2026
When are we racing, and what is the condition?5/19/2026
Sharing data the nice way.5/19/2026
I really want to be with you.5/19/2026
Transferring ownership.5/19/2026
Joined together.5/19/2026
What's suspect?5/19/2026
Zero Division, Error Error?5/18/2026
constexpr if5/18/2026
Can you list what's initialized?5/18/2026
Minus 05/16/2026
I'm printing mom...5/6/2026
Satisfy me!4/24/2026
Another string question?4/24/2026
Going global4/21/2026
I thought I understood this.4/20/2026
Custom deleter magic?4/20/2026
Comparing your variants4/19/2026
What's statically wrong?4/19/2026
Memory order I4/11/2026
Which kind of vector?4/7/2026
r-value confusion.3/6/2026
A mix of creations.3/6/2026
Too many question(mark)s3/6/2026
Degenerate tree.3/5/2026
Guides3/5/2026
A big byte.3/5/2026
Let me give you a pointer.3/5/2026
Override me.3/5/2026
Treat them as equals.3/5/2026
One of these containers is not like the other.3/5/2026
Let's go global.3/5/2026
l, x, pr3/5/2026
Just die already.3/5/2026
Templating differently.3/5/2026
In a constant bind.3/5/2026
X of Y3/5/2026
Class is in session.3/5/2026
Pointers pointing to pointers 13/5/2026
Pointers pointing to pointers 23/5/2026
Make it smaller.3/5/2026
Delete me nicely.3/5/2026
Just call me, baby.3/5/2026
Build it.3/5/2026
What's this? Get it out of my face.3/5/2026
Ban NULL3/5/2026
RAII of light.3/5/2026
Why can't we be friends?3/5/2026
Shallow people.3/5/2026
Deadly trinity.3/5/2026
Deadlier trinity.3/5/2026
Lamb-duh3/5/2026
No hot reload.3/5/2026
Newtwo3/5/2026
Discrimination!3/5/2026
Compiled out.3/5/2026
null, for sure?3/5/2026
Invoke me.3/4/2026
override!3/4/2026
2 Types of Parallelism2/28/2026
This scares me.2/14/2026
You're still not real.2/14/2026
Bring them in, boys!2/14/2026
what??!|2/14/2026
Null and void.2/11/2026
This is C++?2/11/2026
GG2/11/2026
Two typeids2/11/2026
print function?2/11/2026
Reinventing the cat2/6/2026
Streams2/5/2026
I'm leaking bytes!2/5/2026
Get rid of it, maybe?1/30/2026
Please proceed.1/30/2026
Trap into it.1/30/2026
Short Flings, Long Affairs1/30/2026
He chose me. 1/30/2026
Spuriously failed...1/28/2026
.template1/28/2026
Virtually a template.1/28/2026
TMP troubles1/27/2026
There is no free template.1/26/2026
Templated templates1/26/2026
Can you add 1?1/26/2026
The const or the ?1/26/2026
Templatey signatures.1/25/2026
You're not a real person!1/25/2026
You're volatile.1/25/2026
Requires requires1/25/2026
Static* and Dynamic*1/25/2026
More constants more problems.1/25/2026
Pointers to Pointers to Pointers1/25/2026
Point to me!1/25/2026
Dangerous for-loops.1/25/2026
User / Standard Conversions1/25/2026
Const and Not Const*1/25/2026
Concepts require understanding.1/25/2026
Template Specializations 21/25/2026
A template, or not not?1/25/2026
Using Decltype Auto1/25/2026
Incomprehensible order.1/25/2026
long long1/25/2026
Decltype Hell1/23/2026
Very Blank Namespace1/23/2026
Using namespace std;1/23/2026
Shifting off the edge1/23/2026
Ouroboros 51/23/2026
Ouroboros 11/23/2026
Munch munch munch!1/23/2026
Aaaargggc1/23/2026
I don't get the pun.1/23/2026
Be careful.1/23/2026
(type(expression))1/23/2026
I don't give a flying float1/22/2026
sizeof your comprehension1/22/2026
I’m empty inside 1.1/22/2026
Template sum 11/22/2026
_global_variable1/22/2026
This utility exists?1/22/2026
? 1 : 2 -> auto1/22/2026
How many copies?1/22/2026
So close to unwinding.1/21/2026
3 exits1/21/2026
Wrong map, bro.1/21/2026
is_lock_free()1/21/2026
Exit the function early.1/21/2026
Money laundering 21/21/2026
a + b + c1/20/2026
Relaxing in the midst of synchronizing.1/20/2026
What's Under Test 11/20/2026
Impermissible Atomics1/20/2026
containers and constexprs1/20/2026
Ranges of enums1/20/2026
-dont-elide-me1/20/2026
I min-maxed my character.1/20/2026
Overloading the overload.1/20/2026
Transfering namespaces1/20/2026
Call it, improved.1/20/2026
Are different things the same?1/20/2026
Adding const, virtually?1/20/2026
Static Shenanigans1/20/2026
It's weak, but how big is it?1/20/2026
Only these can do this.1/19/2026
Where are we?1/19/2026
Non-const reference T1/19/2026
as-if I'd ever let you.1/19/2026
Array, Array, go away, come again another day.1/19/2026
Global Local Lambda Capture1/19/2026
#Pragma Roll1/19/2026
r-expression1/19/2026
[[..something..]]1/19/2026
In the beginning...1/19/2026
First or second?1/19/2026
___ is to size_t1/19/2026
Whatever floats your cope.1/19/2026
Copy constructor, maybe.1/19/2026
A, B, C, harder than 1, 2, 31/19/2026
Throw me out.1/19/2026
Nested Types in Templates1/19/2026
Where did std::thread go?1/19/2026
I really hate decltype1/19/2026
Lock Purpose Basics1/18/2026
More data more problems1/18/2026
If the OS is running...1/18/2026
What the fork?1/18/2026
Stack Direction1/18/2026
Who can share?1/18/2026
Translate which address?1/18/2026
Memory Segmentation1/18/2026
Modality of memory.1/18/2026
To delete or not to delete1/18/2026
Getting high(er).1/18/2026
Trailing Return Type Purpose1/18/2026
One of these mains.1/18/2026
Adding const, overrid-ially.1/18/2026
Cannot Overload1/18/2026
Blank Namespace1/18/2026
More chars more problems.1/18/2026
Lambda defaults1/18/2026
3D Arrays1/18/2026
[0]1/18/2026
To Interrupt or To Poll1/17/2026
SFINAE1/17/2026
Strings? Chars? Cooked.1/17/2026
I'm harboring ints.1/17/2026
int : =1/17/2026
Look it up, buddy.1/17/2026
Forward, again.1/17/2026
Hey, catch!1/17/2026
Two Futures1/17/2026
Wait a second...1/17/2026
Stay there.1/17/2026
Template Specializations 31/17/2026
Inconsistent arguments.1/16/2026
Nah, we’re not moving.1/16/2026
Template Specializations 11/15/2026
Template Printer1/15/2026
Decorator Disaster1/14/2026
Zip it1/14/2026
**args1/14/2026
If you've used templates, you've run into this.1/13/2026
Who comes first?1/13/2026
Templates and references1/13/2026
Ampersand1/13/2026
A, B, C, initializer_list1/13/2026
Where did it go?1/13/2026
Dereference++1/13/2026
Don't end me.1/13/2026
Specialize me.1/13/2026
Copying and Not Copying1/12/2026
wtf const1/12/2026
long vs int1/12/2026
++i ++i1/12/2026
Return type confusion.1/12/2026
Let's link up.1/12/2026
I get along with the locals.1/12/2026
Bound to love lower_bound.1/12/2026
Preprocessor chicanery 1/12/2026
I hate extern.1/12/2026
Wipe them out.1/12/2026
East to West1/12/2026
Castaway1/12/2026
structs of structs of structs 31/11/2026
Array extensioooooons1/11/2026
Tear it out root and stem1/11/2026
std::forward1/10/2026
Freedom?1/10/2026
We're virtually there.1/10/2026
Money laundering 11/10/2026
A very small value1/10/2026
Haha…1/10/2026
Unsigned - Unsigned1/10/2026
Are we compatible?1/10/2026
What's wrong, loopy?1/10/2026
Template sum 21/10/2026
Delete this. Now!1/10/2026
1s in chat if you're cooked1/10/2026
& and &&1/9/2026
So, where is 1 stored?1/9/2026
Lookup!1/9/2026
Arms length1/9/2026
What's the alignment?1/9/2026
Move!1/9/2026
How Much More New?1/9/2026
Woopsie noexcept Method1/9/2026
Catching noexcept Method1/9/2026
Ordering matters?1/9/2026
Auto with Braced Initializers1/9/2026
Auto got it wrong.1/9/2026
#square1/9/2026
A template, or not?1/9/2026
IIFE1/9/2026
Auto Type Deduction Rules1/9/2026
Char + Char1/9/2026
Understanding arrays1/9/2026
What a Jump!1/9/2026
To sign or not to sign?1/9/2026
Is it const?1/9/2026
Pointer or String?1/9/2026
Why std::make_shared?1/9/2026
Signed Char == Unsigned Char?1/9/2026
std::is_signed<char>::value1/9/2026
Parse a farce.1/9/2026
One after the other1/9/2026
A tale of two pointers!1/9/2026
I'm empty inside 41/9/2026
I'm empty inside 31/9/2026
Empty Structs1/8/2026
The perfect union 3.1/8/2026
Constipated constexpr1/8/2026
skibidi pointer1/8/2026
memset() on objects.1/8/2026
Herb's Destructor1/8/2026
I'm empty inside 21/8/2026
Type, enter, run1/8/2026
Wannabe1/8/2026
I love big numbers1/8/2026
Ouroboros 41/8/2026
Moved from.1/8/2026
Do you understand creation?1/8/2026
Constructing it, with it.1/8/2026
Is it accessible?1/8/2026
Signed Integer Overflow1/8/2026
Is it converted?1/8/2026
In a Diamond1/8/2026
Not too deep1/8/2026
It's hidden1/7/2026
What's the point?1/7/2026
Conditional Trap1/7/2026
Even if nothing!1/7/2026
Double flushing?1/7/2026
Under the Shadow1/7/2026
A Code Review 11/7/2026
You don't understand strings.1/7/2026
Case and point 21/6/2026
Case and point 11/6/2026
Initialization order.1/6/2026
Const and Not Const1/6/2026
You don't get references.1/6/2026
What's Under Test 21/6/2026
It's a simple struct.1/6/2026
Using vs Typedef1/6/2026
Throwing a wrench out of it.1/6/2026
Indexing arrays1/6/2026
References in Class1/6/2026
Where is this?1/6/2026
Overloads 11/6/2026
Const crashout 11/6/2026
Double trouble?1/6/2026
virtual <<1/5/2026
Throwing a wrench into it.1/5/2026
auto&& T&& <T>&&1/5/2026
Initialize Object1/5/2026
I am the shadows.1/5/2026
C++'s Most What?1/5/2026
Even One Virtual Method1/5/2026
He fumbled the [] operator.1/5/2026
Exception safety guarantees1/5/2026
Throwing noexcept Method?1/5/2026
Storage Duration1/5/2026
Delete Delete Delete1/5/2026
The Memory Model's Introduction1/5/2026
Nested Namespaces1/5/2026
I hate decltype1/5/2026
Greedy Greedy1/5/2026
What's zero?1/5/2026
Boolean Addition1/5/2026
Void Pointer Dereferencing1/5/2026
goto? go where?1/5/2026
I'm here! Now I'm gone.1/5/2026
How many allocations?1/5/2026
It's shared, but is it big?1/5/2026
Comma'on, on!1/5/2026
Implicitly Explicit1/5/2026
ABC. Easy as 123?1/5/2026
Don't @ me1/5/2026
What's a character?1/5/2026
How does it allocate?1/5/2026
Before or after?1/5/2026
Friends make you fat?1/5/2026
auto... &?1/5/2026
In one out the other.1/5/2026
Children make you fat?1/5/2026
private, public, protected1/5/2026
Change it for me.1/5/2026
Erase it.1/5/2026
Get around &.1/5/2026
Between two parts.1/5/2026
Streams of strings.1/5/2026
Where do we go now?1/5/2026
Do it for you.1/5/2026
How'd you read this?1/5/2026
Call it.1/5/2026
Exception in my constructor1/4/2026
Is a pointer a pointer?1/4/2026
Method-only objects1/4/2026
Class Inheritance Access Control1/4/2026
Struct over Class1/4/2026
Stop! Don’t move!1/4/2026
String them together.1/4/2026
Forgot one?1/4/2026
Am I missing something?1/4/2026
Keep your cool, keep it constant.1/4/2026
I'm moving in.1/4/2026
X ways1/4/2026
Drop these.1/4/2026
Zip it 31/4/2026
Understand lambdas, understand C++.1/4/2026
Parents are always right?1/4/2026
I like to share my pointer.1/4/2026
Overloading lambdas!1/4/2026
Containers for containers.1/4/2026
Down shift1/4/2026
Side-by-side1/4/2026
Let's go the other way.1/4/2026
The designated representative.1/4/2026
I really really hate decltype1/4/2026
SOO, about that object.1/4/2026
The perfect union 2.1/4/2026
Am I unique?1/4/2026
Removing the polymorphic1/4/2026
String placement1/4/2026
Who'd you call?1/4/2026
Schrödinger's Initializer1/3/2026
If Else... What?1/3/2026
Have him play with it.1/3/2026
mdspaaaaaan1/3/2026
Over here, then over there.1/3/2026
Inspector Gadget1/3/2026
std::cout vs std::cerr1/3/2026
structs of structs of structs 21/2/2026
Who lives here?1/2/2026
Are you pessimistic?1/2/2026
2 variables 1 auto1/2/2026
Put it right there1/2/2026
Class inStruction 1/1/2026
Class vs Struct1/1/2026
Shared pointer constructor1/1/2026
96% of you will fail this.1/1/2026
Default shared pointer1/1/2026
Simple Pointer Math1/1/2026
The headers you never knew1/1/2026
Initialization?!1/1/2026
delete it.1/1/2026
Replace all the functions!1/1/2026
Typename...1/1/2026
++ before or after?1/1/2026
Chop Chop Chop1/1/2026
How big is a pointer?1/1/2026
Changing Const?1/1/2026
What's a lambda?1/1/2026
Vector construction1/1/2026
Vector growth 11/1/2026
Vector growth 21/1/2026
uint32_t1/1/2026
To <T> or not to <T>1/1/2026
Is it used?1/1/2026
Floating points, you sure?1/1/2026
Constructing it.1/1/2026
Unsigned Integer Overflow1/1/2026
Shortcuts1/1/2026
Who’s Pointing at What?1/1/2026
Is it composed?1/1/2026
Overloading ++1/1/2026
Will It Cascade?1/1/2026
So, how big is vector?1/1/2026
A Loop Without A Loop1/1/2026
Zero Division, Error?1/1/2026
Where'd it go?1/1/2026
Observe Closely1/1/2026
Do-while...1/1/2026
It's unique, but is it big?1/1/2026
Comma'on!1/1/2026
Once or twice?1/1/2026
CTAD1/1/2026
Not this, again.1/1/2026
What even is a string?1/1/2026
Catch me if you can!1/1/2026
& through me.1/1/2026
0.0_712/31/2025
The perfect union.12/31/2025
C++ is a…12/31/2025
Who are you pointing to?12/31/2025
You don't always matter to me12/31/2025
structs of structs of structs12/31/2025
Bodyguard12/30/2025

Progress Overview