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step_henny
Last logged in Sep 1, 2026

Activity

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

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Rank
Distinguished
Tier 7 of 11
Total XP
259,892
Principal rank badgePrincipal
Fellow rank badgeFellow
240,108 XP to Fellow4%
Questions
420
Solved
Problems
37
Solved
Quizzes
0
Completed
Awards
0
Received
Streak
0
Days
Best Streak
17
Days

Recently Completed

TitleStatusDate
CYou don't get references.
EasyLanguageKnowledge
Sep 2, 2026
CI min-maxed my character.
MediumLanguageKnowledge
Sep 2, 2026
CIn one out the other.
EasyLanguageKnowledge
Sep 2, 2026
C1s in chat if you're cooked
HardLanguageKnowledge
Sep 1, 2026
CStreams of strings.
MediumLanguageKnowledge
Aug 28, 2026
C& through me.
EasyLanguageKnowledge
Aug 27, 2026
CNull and void.
EasyLanguageKnowledge
Aug 27, 2026
CWhere'd it go?
CookedLanguageKnowledge
Aug 25, 2026
CRanges of enums
MediumLanguageKnowledge
Aug 24, 2026
Csizeof your comprehension
MediumLanguageKnowledge
Aug 24, 2026
CIs a pointer a pointer?
MediumLanguageKnowledge
Aug 24, 2026
CGetting high(er).
MediumLanguageKnowledge
Aug 24, 2026
CGet around &.
EasyLanguageKnowledge
Aug 24, 2026
CDelete this. Now!
CookedLanguageKnowledge
Aug 24, 2026
CAm I unique?
MediumLanguageKnowledge
Aug 19, 2026
CIterating over my confusion
EasyLanguageKnowledge
Aug 18, 2026
C& and &&
CookedLanguageKnowledge
Aug 18, 2026
CImplement std::deque
HardLanguageKnowledge314.5ms
Aug 16, 2026
2s Complement Practice
CookedDigitalDesign
Aug 15, 2026
Hexadecimal Notation Practice
CookedDigitalDesign
Aug 15, 2026
CImplement a Hash Map 1
MediumLanguageKnowledge14.3ms
Aug 15, 2026
CImplement LRU Cache
MediumLanguageKnowledge10.7ms
Aug 14, 2026
CImplement a Ring Buffer
MediumLanguageKnowledge8.6ms
Aug 13, 2026
CUnderstanding arrays
MediumLanguageKnowledge
Aug 10, 2026
CSo, how big is vector?
MediumLanguageKnowledge
Aug 10, 2026
CImplement decorator
EasyDesignPatterns18.8ms
Aug 8, 2026
CImplement abstract factory
CookedDesignPatterns4.0ms
Aug 8, 2026
CDouble flushing?
CookedLanguageKnowledge
Aug 7, 2026
CDab up the DAG
HardLanguageKnowledge5.4ms
Aug 5, 2026
CHe fumbled the [] operator.
EasyLanguageKnowledge
Aug 4, 2026
CConflating a Queue
EasyLanguageKnowledge5.6ms
Aug 4, 2026
CImplement vector
MediumLanguageKnowledge7.7ms
Aug 3, 2026
CImplement mutex
MediumConcurrency555.6ms
Aug 3, 2026
CHow do I test ts 1?
MediumConcurrency
Aug 2, 2026
CTrue-sharing data structure
EasyConcurrency2.0ms
Aug 2, 2026
CDistributed System Task Schedule Reconciliation
HardLanguageKnowledge10.3ms
Aug 1, 2026
CVector growth 1
EasyLanguageKnowledge
Jul 26, 2026
CA, B, C, initializer_list
EasyLanguageKnowledge
Jul 26, 2026
C3D Arrays
EasyLanguageKnowledge
Jul 26, 2026
CVector growth 2
CookedLanguageKnowledge
Jul 26, 2026
CVector construction
CookedLanguageKnowledge
Jul 26, 2026
CIndexing arrays
CookedLanguageKnowledge
Jul 26, 2026
CHow does it allocate?
CookedLanguageKnowledge
Jul 26, 2026
CKeep your cool, keep it constant.
EasyLanguageKnowledge
Jul 26, 2026
CIs it const?
EasyLanguageKnowledge
Jul 26, 2026
Ccontainers and constexprs
EasyLanguageKnowledge
Jul 26, 2026
CLook it up, buddy.
EasyLanguageKnowledge
Jul 26, 2026
CI'm singleton.
CookedDesignPatterns4.2ms
Jul 24, 2026
CNullify
CookedDesignPatterns8.0ms
Jul 24, 2026
CInconsistent arguments.
MediumLanguageKnowledge
Jul 24, 2026
CRemoving the polymorphic
MediumLanguageKnowledge
Jul 24, 2026
COnly these can do this.
MediumLanguageKnowledge
Jul 22, 2026
CMore constants more problems.
MediumLanguageKnowledge
Jul 22, 2026
CTemplate sum 2
EasyLanguageKnowledge
Jul 22, 2026
CTemplate Specializations 3
EasyLanguageKnowledge
Jul 22, 2026
Cauto&& T&& <T>&&
EasyLanguageKnowledge
Jul 22, 2026
CCTAD
CookedLanguageKnowledge
Jul 22, 2026
CIf Else... What?
MediumLanguageKnowledge
Jul 21, 2026
COver here, then over there.
HardLanguageKnowledge
Jul 21, 2026
Cstructs of structs of structs 3
MediumLanguageKnowledge
Jul 21, 2026
CToo many question(mark)s
MediumLanguageKnowledge
Jul 21, 2026
CStreams
EasyLanguageKnowledge
Jul 21, 2026
Cprint function?
MediumLanguageKnowledge
Jul 21, 2026
CInvoke me.
EasyLanguageKnowledge
Jul 21, 2026
CComparing your variants
MediumLanguageKnowledge
Jul 21, 2026
CSo close to unwinding.
CrackedLanguageKnowledge
Jul 21, 2026
C? 1 : 2 -> auto
HardLanguageKnowledge
Jul 20, 2026
CLambda defaults
EasyLanguageKnowledge
Jul 20, 2026
CExit the function early.
EasyLanguageKnowledge
Jul 20, 2026
CCall it, improved.
CookedLanguageKnowledge
Jul 20, 2026
Sharing is caring.
EasyComputerArchitecture
Jul 19, 2026
Instruction Set Architecture
MediumComputerArchitecture
Jul 19, 2026
Common ISAs
CookedComputerArchitecture
Jul 19, 2026
ISA Components
EasyComputerArchitecture
Jul 19, 2026
Which-Way Associativity?
EasyComputerArchitecture
Jul 19, 2026
How big are the lines?
CookedComputerArchitecture
Jul 19, 2026
Tag, you're it.
EasyComputerArchitecture
Jul 19, 2026
How big is it?
EasyComputerArchitecture
Jul 19, 2026
What is a Software Thread?
CookedOperatingSystems
Jul 19, 2026
Interacting with the OS
CookedOperatingSystems
Jul 19, 2026
System vs Procedure Call
CookedOperatingSystems
Jul 19, 2026
ARP Cache Clear
CookedNetworking
Jul 19, 2026
IPv6 ARP?
EasyNetworking
Jul 19, 2026
IPv4 vs IPv6 Headers
EasyNetworking
Jul 19, 2026
Why even IP?
CookedNetworking
Jul 19, 2026
DS, but not Nintendo.
EasyNetworking
Jul 19, 2026
You're too big!
CookedNetworking
Jul 19, 2026
IP Forwarding
CookedNetworking
Jul 19, 2026
IPv6 Flow Label
CookedNetworking
Jul 19, 2026
IPv4 vs IPv6 Fragmentation
HardNetworking
Jul 19, 2026
Broadcast vs Multicast
CookedNetworking
Jul 19, 2026
Broadcast Address Types
MediumNetworking
Jul 19, 2026
Limited Broadcast Usage
EasyNetworking
Jul 19, 2026
Multicast Address Range
EasyNetworking
Jul 19, 2026
Multicast MAC Conversion
EasyNetworking
Jul 19, 2026
CHey, catch!
MediumLanguageKnowledge
Jul 19, 2026
CException safety guarantees
MediumLanguageKnowledge
Jul 19, 2026
CSequential guarantees
CookedConcurrency
Jul 19, 2026
Broadcast Reception Control
MediumNetworking
Jul 17, 2026
Broadcast Forwarding Behavior
EasyNetworking
Jul 17, 2026
DNS Basic Function
CookedNetworking
Jul 17, 2026
DNS Namespace Structure
CookedNetworking
Jul 17, 2026
DNS Zones Purpose
EasyNetworking
Jul 17, 2026
DNS Caching Benefits
CookedNetworking
Jul 17, 2026
TCP Service Model
CookedNetworking
Jul 17, 2026
TCP Sequence Numbers
CookedNetworking
Jul 17, 2026
TCP Reliability Mechanism
CookedNetworking
Jul 17, 2026
TCP Checksum Coverage
EasyNetworking
Jul 17, 2026
TCP Three-way Handshake
CookedNetworking
Jul 17, 2026
TCP TIME_WAIT Purpose
EasyNetworking
Jul 17, 2026
TCP Window Scale Option
EasyNetworking
Jul 17, 2026
TCP RTO Calculation
CookedNetworking
Jul 17, 2026
CConst crashout 1
EasyLanguageKnowledge
Jul 17, 2026
CCatching noexcept Method
EasyLanguageKnowledge
Jul 17, 2026
Cr-value confusion.
HardLanguageKnowledge
Jul 17, 2026
CI don't get the pun.
MediumLanguageKnowledge
Jul 17, 2026
CStop! Don’t move!
EasyLanguageKnowledge
Jul 17, 2026
CMoved from.
EasyLanguageKnowledge
Jul 17, 2026
CMove!
EasyLanguageKnowledge
Jul 17, 2026
CIs it constructible?
CrackedLanguageKnowledge10.6ms
Jul 17, 2026
CImplement std::any
CrackedLanguageKnowledge13.6ms
Jul 17, 2026
C96% of you will fail this.
HardLanguageKnowledge
Jul 17, 2026
CThrow me out.
HardLanguageKnowledge
Jul 17, 2026
C-dont-elide-me
HardLanguageKnowledge
Jul 17, 2026
CStorage Duration
EasyLanguageKnowledge
Jul 16, 2026
CInitialization order.
MediumLanguageKnowledge
Jul 16, 2026
CException in my constructor
MediumLanguageKnowledge
Jul 16, 2026
CCopy constructor, maybe.
MediumLanguageKnowledge
Jul 16, 2026
CConstructing it, with it.
EasyLanguageKnowledge
Jul 15, 2026
CAuto with Braced Initializers
CookedLanguageKnowledge
Jul 15, 2026
C3D Space
CookedLanguageKnowledge3.2ms
Jul 15, 2026
CSimple Pointer Math
MediumLanguageKnowledge
Jul 15, 2026
CI'm leaking bytes!
EasyLanguageKnowledge
Jul 15, 2026
CEast to West
MediumLanguageKnowledge
Jul 15, 2026
CChop Chop Chop
EasyLanguageKnowledge
Jul 15, 2026
CCastaway
MediumLanguageKnowledge
Jul 15, 2026
CWhat's the point?
EasyLanguageKnowledge
Jul 15, 2026
Cdelete it.
EasyLanguageKnowledge
Jul 15, 2026
CThe headers you never knew
CookedLanguageKnowledge
Jul 15, 2026
CDelete Delete Delete
CookedDesignPatterns
Jul 15, 2026
CImplement make_unique
MediumLanguageKnowledge1.2ms
Jul 15, 2026
CImplement unique_ptr
EasyLanguageKnowledge7.5ms
Jul 14, 2026
CWho comes first?
MediumLanguageKnowledge
Jul 14, 2026
Cvirtual <<
CookedLanguageKnowledge
Jul 14, 2026
CReworking hierarchies to compile-time.
MediumDesignPatterns3.4ms
Jul 14, 2026
TCP Flow Control
EasyNetworking
Jul 12, 2026
So, what's a TCP SACK?
EasyNetworking
Jul 12, 2026
Same line, different time.
CookedConcurrency
Jul 12, 2026
TCP Fast Retransmit
CookedNetworking
Jul 12, 2026
TCP Packet Reordering
EasyNetworking
Jul 12, 2026
TCP Flow Control Purpose
EasyNetworking
Jul 12, 2026
TCP Sliding Window
EasyNetworking
Jul 12, 2026
Nagle Algorithm Purpose
CookedNetworking
Jul 12, 2026
Delayed Acknowledgments
EasyNetworking
Jul 12, 2026
Silly Window Syndrome
EasyNetworking
Jul 12, 2026
TCP Congestion Detection
EasyNetworking
Jul 12, 2026
Thinking of memory strategically
CookedOperatingSystems
Jul 12, 2026
Page Table Present Bit
CookedOperatingSystems
Jul 11, 2026
Swap Space Function
CookedOperatingSystems
Jul 11, 2026
LRU Replacement Policy
CookedOperatingSystems
Jul 11, 2026
More data more problems
CookedOperatingSystems
Jul 11, 2026
What am I using to lock this?
EasyOperatingSystems
Jul 11, 2026
Counter Thread Safety
CookedOperatingSystems
Jul 10, 2026
Scalable Counter Design
EasyOperatingSystems
Jul 10, 2026
Lock Coupling
EasyOperatingSystems
Jul 10, 2026
Condition Variable Purpose
CookedOperatingSystems
Jul 10, 2026
Condition Variable Atomicity
CookedOperatingSystems
Jul 10, 2026
Producer-Consumer Signaling
EasyOperatingSystems
Jul 10, 2026
Signal vs Broadcast
CookedOperatingSystems
Jul 10, 2026
Semaphore Basic Definition
CookedOperatingSystems
Jul 10, 2026
Thread Pool Benefits
EasyConcurrency
Jul 10, 2026
TCP Termination Process
CookedNetworking
Jul 10, 2026
Fast Random
EasyOperatingSystems
Jul 10, 2026
Private to Public
CookedNetworking
Jul 10, 2026
Lock It
MediumOperatingSystems
Jul 10, 2026
NAT or ...
EasyNetworking
Jul 10, 2026
Underlying Protocols
EasyNetworking
Jul 10, 2026
OS OSI
CookedNetworking
Jul 10, 2026
Open Close Open Close
EasyNetworking
Jul 10, 2026
IEEEEEEEEEE
HardComputerArchitecture
Jul 10, 2026
Where can I find you?
EasyOperatingSystems
Jul 10, 2026
The number of fragments
MediumNetworking
Jul 10, 2026
The bare minimum
MediumNetworking
Jul 10, 2026
random_insert
CookedLanguageKnowledge
Jul 10, 2026
CStatic* and Dynamic*
MediumLanguageKnowledge
Jul 10, 2026
CIt's weak, but how big is it?
MediumLanguageKnowledge
Jul 9, 2026
CShared pointer constructor
EasyLanguageKnowledge
Jul 9, 2026
CDefault shared pointer
EasyLanguageKnowledge
Jul 9, 2026
CHow big is a pointer?
CookedLanguageKnowledge
Jul 9, 2026
CIn a Diamond
EasyLanguageKnowledge
Jul 9, 2026
CEven One Virtual Method
EasyLanguageKnowledge
Jul 9, 2026
CAdding const, virtually?
EasyLanguageKnowledge
Jul 9, 2026
CAdding const, overrid-ially.
EasyLanguageKnowledge
Jul 9, 2026
CHerb's Destructor
CookedLanguageKnowledge
Jul 9, 2026
CI’m empty inside 1.
MediumLanguageKnowledge
Jul 9, 2026
CIt's a simple struct.
EasyLanguageKnowledge
Jul 9, 2026
CEmpty Structs
EasyLanguageKnowledge
Jul 9, 2026
Reinventing the cat
EasyNetworking
Jul 9, 2026
Lions and buffalos
EasyLanguageKnowledge
Jul 9, 2026
How much did I win?
EasyPuzzles
Jul 9, 2026
Are we in St. Petersburg?
CookedProbabilityStatistics
Jul 9, 2026
CAddress Translation 3
MediumOperatingSystems10.1ms
Jul 9, 2026
CI get along with the locals.
EasyLanguageKnowledge
Jul 7, 2026
C3 exits
EasyLanguageKnowledge
Jul 7, 2026
CLet's link up.
MediumLanguageKnowledge
Jul 7, 2026
CSpuriously failed...
EasyConcurrency
Jul 7, 2026
CRelaxing in the midst of synchronizing.
EasyConcurrency
Jul 7, 2026
CContainers for containers.
EasyLanguageKnowledge
Jul 7, 2026
CFreedom?
EasyLanguageKnowledge
Jul 7, 2026
CSOO, about that object.
EasyLanguageKnowledge
Jul 7, 2026
CString placement
EasyLanguageKnowledge
Jul 7, 2026
CHave him play with it.
EasyLanguageKnowledge
Jul 7, 2026
Cskibidi pointer
EasyLanguageKnowledge
Jul 7, 2026
Cstructs of structs of structs 2
EasyLanguageKnowledge
Jul 7, 2026
Cstructs of structs of structs
EasyLanguageKnowledge
Jul 7, 2026
Coverride!
EasyLanguageKnowledge
Jul 7, 2026
CTrust me, I'm Async
MediumConcurrency
Jul 7, 2026
Page Fault Mechanism
CookedOperatingSystems
Jul 7, 2026
Multi-level Page Tables
EasyOperatingSystems
Jul 4, 2026
CWho are you pointing to?
CookedLanguageKnowledge
Jul 4, 2026
CAddress Translation 2
MediumComputerArchitecture13.9ms
Jul 2, 2026
CI don't give a flying float
MediumLanguageKnowledge
Jul 1, 2026
CWhatever floats your cope.
EasyLanguageKnowledge
Jul 1, 2026
CFloating points, you sure?
CookedLanguageKnowledge
Jul 1, 2026
CAddress Translation 1
EasyComputerArchitecture9.2ms
Jul 1, 2026
The Page Replacement Algorithm
CookedOperatingSystems
Jun 30, 2026
CI'm leaking bytes! 2
EasyOperatingSystems
Jun 30, 2026
Shake it, shake, shake it.
CookedOperatingSystems
Jun 30, 2026
PML4
EasyOperatingSystems
Jun 30, 2026
PML?
HardOperatingSystems
Jun 30, 2026
What the fork?
CookedOperatingSystems
Jun 30, 2026
isolcpu, taskset, pthread_setaffinity.
EasyOperatingSystems
Jun 30, 2026
PythonThe whole shebang
MediumOperatingSystems
Jun 30, 2026
IPC mutex
EasyOperatingSystems
Jun 30, 2026
System Initialization
CookedOperatingSystems
Jun 30, 2026
Return from where?
EasyOperatingSystems
Jun 30, 2026
C____ Park
MediumLanguageKnowledge
Jun 30, 2026
CWhat's statically wrong?
MediumLanguageKnowledge
Jun 30, 2026
Cconst char* mission
MediumLanguageKnowledge
Jun 30, 2026
CLets 8x the stride.
EasyLanguageKnowledge
Jun 30, 2026
CI only speak english
MediumLanguageKnowledge
Jun 30, 2026
CAnother string question?
MediumLanguageKnowledge
Jun 30, 2026
CI thought I understood this.
CookedLanguageKnowledge
Jun 30, 2026
Cconstexpr if
EasyLanguageKnowledge
Jun 30, 2026
C fp compatibility
EasyLanguageKnowledge
Jun 29, 2026
CI'm printing mom...
MediumLanguageKnowledge
Jun 29, 2026
CDynamic is powerful 1
MediumLanguageKnowledge
Jun 29, 2026
CHidden calories
MediumLanguageKnowledge
Jun 29, 2026
TLB Purpose
CookedOperatingSystems
Jun 29, 2026
The fundemental page
CookedOperatingSystems
Jun 29, 2026
CImplement an allocator
MediumOperatingSystems7.2ms
Jun 29, 2026
CCustom deleter magic?
EasyLanguageKnowledge
Jun 28, 2026
CGoing global
MediumLanguageKnowledge
Jun 28, 2026
CWhich kind of vector?
EasyLanguageKnowledge
Jun 28, 2026
CCan you list what's initialized?
EasyLanguageKnowledge
Jun 28, 2026
CZero Division, Error Error?
EasyLanguageKnowledge
Jun 28, 2026
CMinus 0
EasyLanguageKnowledge
Jun 28, 2026
It's magic.
EasyOperatingSystems
Jun 27, 2026
Dealing with Fragmentation
EasyOperatingSystems
Jun 27, 2026
Buddy Allocation System
EasyOperatingSystems
Jun 27, 2026
CBase and Many Bounds
EasyOperatingSystems18.9ms
Jun 26, 2026
Fragmentation 1
EasyOperatingSystems
Jun 25, 2026
Memory Segmentation
CookedOperatingSystems
Jun 25, 2026
Base my bounds
CookedOperatingSystems
Jun 25, 2026
Weighing Jobs
EasyOperatingSystems
Jun 25, 2026
Linux, what are you using?
CookedOperatingSystems
Jun 25, 2026
How are jobs stored?
CookedOperatingSystems
Jun 25, 2026
CScheduling in Strides!
MediumOperatingSystems7.8ms
Jun 25, 2026
Pay your fair share.
CookedOperatingSystems
Jun 25, 2026
Ding ding ding!
CookedOperatingSystems
Jun 25, 2026
Simple system call overhead
MediumOperatingSystems
Jun 25, 2026
Job Scheduling
EasyOperatingSystems
Jun 25, 2026
Uncontrolled scheduling
CookedOperatingSystems
Jun 25, 2026
P switch T switch.
CookedOperatingSystems
Jun 25, 2026
Translate which address?
CookedOperatingSystems
Jun 24, 2026
CAmpersand
CookedOperatingSystems
Jun 24, 2026
CThat's BS!
MediumOperatingSystems
Jun 24, 2026
Top of the stack
EasyOperatingSystems
Jun 24, 2026
CThey're stacked.
EasyOperatingSystems
Jun 24, 2026
CKcats
EasyOperatingSystems
Jun 24, 2026
Before main()
EasyOperatingSystems
Jun 24, 2026
After main()
CookedOperatingSystems
Jun 24, 2026
Split segments
CookedOperatingSystems
Jun 24, 2026
CAm I missing something?
HardLanguageKnowledge
Jun 23, 2026
COverloading lambdas!
EasyLanguageKnowledge
Jun 23, 2026
CBetween two parts.
EasyLanguageKnowledge
Jun 23, 2026
CI am the shadows.
EasyLanguageKnowledge
Jun 23, 2026
Lock Free vs Wait Free
EasyConcurrency
Jun 23, 2026
ABA Problem in Lock-free Code
CookedConcurrency
Jun 23, 2026
CWrite-supremacy concurrent data structure.
HardConcurrency1003.8ms
Jun 23, 2026
CImplement Lock-Free SPSC Queue
MediumConcurrency7.9ms
Jun 21, 2026
Lock-free Memory Management
EasyConcurrency
Jun 21, 2026
CImplement std::jthread
HardConcurrency77.2ms
Jun 21, 2026
But how do it do?
CookedOperatingSystems
Jun 20, 2026
Why an OS?
EasyOperatingSystems
Jun 20, 2026
Interrupting an interrupt.
EasyOperatingSystems
Jun 20, 2026
CParallel tracks
MediumConcurrency503.8ms
Jun 20, 2026
Workload Distribution
EasyConcurrency
Jun 20, 2026
CTell me the time
MediumLanguageKnowledge
Jun 20, 2026
Registering RAM
CookedComputerArchitecture
Jun 20, 2026
Memory Addressing Modes
CookedComputerArchitecture
Jun 20, 2026
Pipeline Operation Basics
EasyComputerArchitecture
Jun 20, 2026
Pipelining Performance Benefits
CookedComputerArchitecture
Jun 20, 2026
Branch Instruction Types
CookedComputerArchitecture
Jun 20, 2026
Space the cache
EasyComputerArchitecture
Jun 20, 2026
Single-Cycle Processor Limitations
CookedComputerArchitecture
Jun 20, 2026
Map the cache, again
MediumComputerArchitecture
Jun 20, 2026
CYour (GHR) size matters
MediumComputerArchitecture
Jun 20, 2026
CImplement thread pool
MediumConcurrency81.2ms
Jun 20, 2026
CHow many kids do I want?
CookedConcurrency
Jun 20, 2026
CPeas in a pod.
EasyConcurrency
Jun 19, 2026
Cache Coherence Optimization
CookedConcurrency
Jun 19, 2026
Amdahl's Law Application
CookedConcurrency
Jun 19, 2026
CImplement stop_token
EasyConcurrency11.9ms
Jun 19, 2026
CWhat pointer?
EasyConcurrency
Jun 19, 2026
CMemory order I
EasyConcurrency
Jun 19, 2026
CAre they always like this?
EasyConcurrency
Jun 17, 2026
CUnsigned - Unsigned
MediumLanguageKnowledge
Jun 16, 2026
CUnderstand lambdas, understand C++.
EasyLanguageKnowledge
Jun 16, 2026
CSatisfy me!
EasyLanguageKnowledge
Jun 16, 2026
C_global_variable
HardLanguageKnowledge
Jun 16, 2026
CThe designated representative.
MediumLanguageKnowledge
Jun 16, 2026
CSchrödinger's Initializer
MediumLanguageKnowledge
Jun 16, 2026
CForgot one?
EasyLanguageKnowledge
Jun 16, 2026
CC++ is a…
EasyLanguageKnowledge
Jun 16, 2026
Cross-thread Exception Handling
CookedConcurrency
Jun 16, 2026
CAsync surprise party
EasyConcurrency
Jun 16, 2026
CImplement shared_ptr
MediumLanguageKnowledge9.9ms
Jun 16, 2026
CWait, I'm sleeping
EasyConcurrency
Jun 14, 2026
A onephore
CookedConcurrency
Jun 14, 2026
CImplement Reader-Writer Lock
HardConcurrency409.9ms
Jun 14, 2026
How fine is the grain?
EasyConcurrency
Jun 13, 2026
CImplement SPSC Queue
EasyConcurrency55.6ms
Jun 13, 2026
EEEEEEEEEEI
MediumComputerArchitecture
Jun 8, 2026
CHow many copies?
CrackedComputerArchitecture
Jun 8, 2026
CShifting off the edge
CookedComputerArchitecture
Jun 7, 2026
Ca + b + c
CookedComputerArchitecture
Jun 7, 2026
Cache me if you can!
MediumComputerArchitecture
Jun 7, 2026
Cache me if you can! 2
MediumComputerArchitecture
Jun 7, 2026
Cache me if you can! 3
EasyComputerArchitecture
Jun 7, 2026
Speedup again
EasyComputerArchitecture
Jun 7, 2026
Speedup
MediumComputerArchitecture
Jun 7, 2026
CGet it for me quick!
EasyComputerArchitecture
Jun 7, 2026
X Indexed Y Tagged 1
EasyComputerArchitecture
Jun 7, 2026
X Indexed Y Tagged 2
EasyComputerArchitecture
Jun 7, 2026
X Indexed Y Tagged 3
EasyComputerArchitecture
Jun 7, 2026
Process Control Block
EasyOperatingSystems
Jun 7, 2026
Process States
CookedOperatingSystems
Jun 7, 2026
Clean up the thread
CookedOperatingSystems
Jun 7, 2026
Join me
CookedOperatingSystems
Jun 7, 2026
A thread-safe stack.
EasyConcurrency
Jun 7, 2026
Locking Granularity Tradeoffs
EasyConcurrency
Jun 7, 2026
CLocked up, they won't let me out.
EasyConcurrency
Jun 7, 2026
Accumulate it all in parallel.
EasyConcurrency
Jun 7, 2026
CParallel pitfalls
EasyConcurrency
Jun 7, 2026
No progress.
EasyConcurrency
Jun 7, 2026
Spin what lock?
CookedConcurrency
Jun 7, 2026
CHey, I'm waiting to be unlocked.
EasyConcurrency
Jun 7, 2026
CYou're not part of our group.
MediumConcurrency
Mar 7, 2026
What am I guarding?
CookedConcurrency
Mar 6, 2026
CBypass the mutex, or not?
EasyConcurrency
Mar 6, 2026
How does it mutex?
MediumConcurrency
Mar 6, 2026
When are we racing, and what is the condition?
EasyConcurrency
Mar 6, 2026
Sharing data the nice way.
CookedConcurrency
Mar 6, 2026
CI really want to be with you.
MediumConcurrency
Mar 6, 2026
CTransferring ownership.
EasyConcurrency
Mar 6, 2026
CWhat's suspect?
EasyConcurrency
Mar 6, 2026
Joined together.
EasyConcurrency
Mar 6, 2026
2 Types of Parallelism
EasyConcurrency
Mar 6, 2026
CInspector Gadget
MediumLanguageKnowledge
Jan 4, 2026
CA, B, C, harder than 1, 2, 3
MediumLanguageKnowledge
Jan 4, 2026
CConstipated constexpr
EasyLanguageKnowledge
Jan 4, 2026
CYou don't always matter to me
EasyLanguageKnowledge
Jan 4, 2026
CArray extensioooooons
MediumLanguageKnowledge
Jan 4, 2026
CI'm empty inside 4
EasyLanguageKnowledge
Jan 4, 2026
CI'm empty inside 3
MediumLanguageKnowledge
Jan 4, 2026
CI'm empty inside 2
CookedLanguageKnowledge
Jan 4, 2026
Cstd::cout vs std::cerr
EasyLanguageKnowledge
Jan 4, 2026
CWe're stronger together.
EasyLanguageKnowledge840.7ms
Jan 4, 2026
CPoints and boundaries!
EasyLanguageKnowledge54.9ms
Jan 4, 2026
CWho lives here?
HardLanguageKnowledge
Dec 31, 2025
CBodyguard
EasyLanguageKnowledge
Dec 31, 2025
CMoney laundering 2
MediumLanguageKnowledge
Dec 31, 2025
CMoney laundering 1
MediumLanguageKnowledge
Dec 31, 2025
CTear it out root and stem
MediumLanguageKnowledge
Dec 31, 2025
CAre you pessimistic?
EasyLanguageKnowledge
Dec 31, 2025
CThe perfect union 3.
EasyLanguageKnowledge
Dec 31, 2025
CParse a farce.
MediumLanguageKnowledge
Dec 31, 2025
COne after the other
EasyLanguageKnowledge
Dec 31, 2025
C2 variables 1 auto
EasyLanguageKnowledge
Dec 31, 2025
Cmemset() on objects.
EasyLanguageKnowledge
Dec 31, 2025
CPut it right there
HardLanguageKnowledge
Dec 31, 2025
CA tale of two pointers!
EasyLanguageKnowledge
Dec 31, 2025
CClass inStruction
MediumLanguageKnowledge
Dec 31, 2025
CCase and point 1
EasyLanguageKnowledge
Dec 31, 2025
CCase and point 2
EasyLanguageKnowledge
Dec 31, 2025
CSpin wars
EasyConcurrency
Dec 31, 2025
CUnder the Shadow
HardLanguageKnowledge
Oct 17, 2025
C++i ++i
EasyLanguageKnowledge
Oct 17, 2025
Cwhat??!|
HardLanguageKnowledge
Oct 17, 2025
CTo <T> or not to <T>
EasyLanguageKnowledge
Oct 17, 2025
CI hate decltype
CookedLanguageKnowledge
Oct 17, 2025
Pythonleft or right?
HardLanguageKnowledge
Oct 17, 2025
PythonFooor!
EasyLanguageKnowledge
Oct 17, 2025
CEven if nothing!
EasyLanguageKnowledge
Oct 17, 2025
Cis_lock_free()
EasyLanguageKnowledge
Oct 17, 2025
C___ is to size_t
MediumLanguageKnowledge
Oct 17, 2025
Pythonarrrrg
MediumLanguageKnowledge
Oct 17, 2025
Cache Inclusion
CookedComputerArchitecture
Oct 17, 2025
Multicast Group Membership
CookedNetworking
Oct 16, 2025
So, what's UDP?
EasyNetworking
Oct 16, 2025
Whichcast
CookedNetworking
Oct 16, 2025
Multicast Addressing
MediumNetworking
Oct 16, 2025
CCatch me if you can!
EasyLanguageKnowledge
Oct 16, 2025
CNah, we’re not moving.
MediumLanguageKnowledge
Oct 16, 2025
CTemplatey signatures.
EasyLanguageKnowledge
Oct 16, 2025
CWe're virtually there.
MediumLanguageKnowledge
Oct 16, 2025
CConstructing it.
EasyLanguageKnowledge
Oct 16, 2025
CA very small value
MediumLanguageKnowledge
Oct 16, 2025
CStatic Shenanigans
EasyLanguageKnowledge
Oct 16, 2025
CSigned Integer Overflow
EasyLanguageKnowledge
Oct 16, 2025
CZero Division, Error?
EasyLanguageKnowledge
Oct 16, 2025
CTo delete or not to delete
EasyLanguageKnowledge
Oct 16, 2025
CNot this, again.
EasyLanguageKnowledge
Oct 16, 2025
CTo sign or not to sign?
EasyLanguageKnowledge
Oct 16, 2025
CI like to share my pointer.
EasyLanguageKnowledge
Oct 16, 2025
CChar + Char
EasyLanguageKnowledge
Oct 16, 2025
CYou don't understand strings.
EasyLanguageKnowledge
Oct 16, 2025
Cauto... &?
EasyLanguageKnowledge
Oct 16, 2025
CIs it used?
EasyLanguageKnowledge
Oct 16, 2025
CThe const or the ?
MediumLanguageKnowledge
Oct 16, 2025
CTransfering namespaces
EasyLanguageKnowledge
Oct 16, 2025
CAuto Type Deduction Rules
EasyLanguageKnowledge
Oct 16, 2025
CVirtually a template.
EasyLanguageKnowledge
Oct 16, 2025
CWhere do we go now?
MediumLanguageKnowledge
Oct 16, 2025
CArray, Array, go away, come again another day.
MediumLanguageKnowledge
Oct 16, 2025
CLet's go the other way.
MediumLanguageKnowledge
Oct 16, 2025
COnce or twice?
CookedLanguageKnowledge
Oct 16, 2025
Cr-expression
MediumLanguageKnowledge
Oct 16, 2025
CThe perfect union 2.
MediumLanguageKnowledge
Oct 16, 2025
ISA Instructions
EasyComputerArchitecture
Oct 15, 2025
TLB Switch
EasyComputerArchitecture
Oct 15, 2025
NUMA NUMA NUMA
CookedComputerArchitecture
Oct 15, 2025
CBimodal prediction.
EasyComputerArchitecture
Oct 15, 2025
L1 Cache Split
CookedComputerArchitecture
Oct 15, 2025
3 Cache Misses
CookedComputerArchitecture
Oct 15, 2025
RAM to Cache Memory Transport
CookedComputerArchitecture
Oct 15, 2025
How much parallelism?
EasyComputerArchitecture
Oct 15, 2025
Pipeline Performance Calculation
CookedComputerArchitecture
Oct 15, 2025
Memory Address Translations
EasyComputerArchitecture
Oct 15, 2025
What 'E'?
EasyComputerArchitecture
Oct 15, 2025
It's massive.
EasyComputerArchitecture
Oct 15, 2025
CBimodal prediction II
HardComputerArchitecture
Oct 15, 2025
PythonLEGB!
EasyLanguageKnowledge
Oct 15, 2025
PythonZero Division Error
MediumLanguageKnowledge
Oct 15, 2025
Python__main__
MediumLanguageKnowledge
Oct 15, 2025
PythonDis Me
EasyLanguageKnowledge
Oct 15, 2025
PythonLogical Deduction?
MediumLanguageKnowledge
Oct 15, 2025
PythonSo, where is 1,000 stored?
EasyLanguageKnowledge
Oct 15, 2025
PythonLet's golf!
MediumLanguageKnowledge
Oct 15, 2025
PythonMaximal Snake
EasyLanguageKnowledge
Oct 15, 2025
PythonZip it 2
EasyLanguageKnowledge
Oct 15, 2025
PythonGet truthed.
EasyLanguageKnowledge
Oct 15, 2025
PythonString Interpolation Shenanigans
HardLanguageKnowledge
Oct 15, 2025
PythonDifficulty enumerations.
EasyLanguageKnowledge
Oct 15, 2025
PythonMangled up.
EasyLanguageKnowledge
Oct 15, 2025
PythonLiving by Proxy
EasyLanguageKnowledge
Oct 15, 2025
PythonDependable developers?
MediumLanguageKnowledge
Oct 15, 2025
PythonScope the Scope 2
EasyLanguageKnowledge
Oct 15, 2025
PythonInquisitive Inheritance 2
MediumLanguageKnowledge
Oct 15, 2025
PythonDefault Arguments
EasyLanguageKnowledge
Oct 15, 2025
PythonWhere's my path?
HardLanguageKnowledge
Oct 15, 2025
PythonMake it pretty.
CookedLanguageKnowledge
Oct 15, 2025
PythonZip it 4
EasyLanguageKnowledge
Oct 15, 2025
Pythonget ref
MediumLanguageKnowledge
Oct 15, 2025
PythonThe Loop's Last Laugh
HardLanguageKnowledge
Oct 15, 2025
PythonWhich one should I choose?
MediumLanguageKnowledge
Oct 15, 2025
CHaha…
MediumLanguageKnowledge
Oct 14, 2025
CChanging Const?
CookedLanguageKnowledge
Oct 14, 2025
CObserve Closely
MediumLanguageKnowledge
Oct 14, 2025
CHow Much More New?
EasyLanguageKnowledge
Oct 14, 2025
CYou're still not real.
MediumLanguageKnowledge
Oct 14, 2025
CHow'd you read this?
EasyLanguageKnowledge
Oct 14, 2025
CNot too deep
MediumLanguageKnowledge
Oct 14, 2025
COne of these mains.
EasyLanguageKnowledge
Oct 14, 2025
Cas-if I'd ever let you.
EasyLanguageKnowledge
Oct 14, 2025
CGG
MediumLanguageKnowledge
Oct 14, 2025
C#Pragma Roll
EasyLanguageKnowledge
Oct 14, 2025
CI really really hate decltype
MediumLanguageKnowledge
Oct 14, 2025
CDown shift
MediumLanguageKnowledge
Oct 14, 2025
CIt's unique, but is it big?
CookedLanguageKnowledge
Oct 14, 2025
CErase it.
EasyLanguageKnowledge
Oct 14, 2025
CThe perfect union.
MediumLanguageKnowledge
Oct 14, 2025
CIf you've used templates, you've run into this.
EasyLanguageKnowledge
Oct 14, 2025
C.template
EasyLanguageKnowledge
Oct 14, 2025
CSpecialize me.
MediumLanguageKnowledge
Oct 14, 2025
Speak the language.
CookedOperatingSystems
Oct 14, 2025
It's our time!
EasyOperatingSystems
Oct 14, 2025
You Dirty Bit.
CookedOperatingSystems
Oct 14, 2025
Virtual Address Mask
CookedOperatingSystems
Oct 14, 2025
How Many Page Translations?
EasyOperatingSystems
Oct 14, 2025
Scheduler Trade-offs
EasyOperatingSystems
Oct 14, 2025
Who can share?
MediumOperatingSystems
Oct 13, 2025
The OS Monarch
CookedOperatingSystems
Oct 13, 2025
Clock Replacement Algorithm
EasyOperatingSystems
Oct 13, 2025
CCan you treat me as an equal?
EasyOperatingSystems
Oct 13, 2025
CWhy std::make_shared?
MediumLanguageKnowledge
Oct 13, 2025
CHow many allocations?
EasyLanguageKnowledge
Oct 13, 2025
Cuint32_t
EasyLanguageKnowledge
Oct 13, 2025
The cost of .bss
EasyOperatingSystems
Oct 13, 2025
If the OS is running...
EasyOperatingSystems
Oct 13, 2025
CI'm concerned.
MediumDesignPatterns
Oct 13, 2025
Which header?
EasyNetworking
Oct 13, 2025
CAuto got it wrong.
MediumLanguageKnowledge
Oct 13, 2025
CAaaargggc
MediumLanguageKnowledge
Oct 13, 2025
CDo it for you.
MediumLanguageKnowledge
Oct 13, 2025
PythonDefault Floating Point
EasyLanguageKnowledge
Oct 13, 2025
CWe're both from the future!
MediumConcurrency
Oct 13, 2025
PythonWhat are we replacing?
EasyLanguageKnowledge
Oct 13, 2025
CConst and Not Const*
EasyLanguageKnowledge
Oct 13, 2025
CSomething is wrong.
EasyConcurrency
Oct 13, 2025
CWrong map, bro.
HardLanguageKnowledge
Oct 13, 2025
CReturn type confusion.
MediumLanguageKnowledge
Oct 13, 2025
Virtual address structure
EasyOperatingSystems
Oct 13, 2025
PythonException Unwinding
MediumLanguageKnowledge
Oct 13, 2025
The missing hops
EasyNetworking
Oct 13, 2025
CWhat's wrong, loopy?
MediumLanguageKnowledge
Oct 13, 2025
PythonPepsi
MediumLanguageKnowledge
Oct 13, 2025
Endian? Is that a word?
CookedComputerArchitecture
Sep 16, 2025
X-Way Set Associativity
CookedComputerArchitecture
Sep 16, 2025
Cache Affinity
EasyComputerArchitecture
Sep 16, 2025
Cache Coherence
CookedComputerArchitecture
Sep 9, 2025
CPad it up!
EasyComputerArchitecture
Sep 9, 2025
Instruction Set Categories
EasyComputerArchitecture
Sep 9, 2025
Machine Language Components
CookedComputerArchitecture
Sep 9, 2025
Branch Instruction Effects
EasyComputerArchitecture
Sep 9, 2025
RISC Pipeline Structure
CookedComputerArchitecture
Sep 9, 2025
Processor Architectural Divisions
MediumComputerArchitecture
Sep 9, 2025
TCP Congestion Control Goals
EasyNetworking
Sep 9, 2025
AIMD TCP
EasyNetworking
Sep 9, 2025
TCP Socket
EasyNetworking
Sep 9, 2025
Which way do I read this?
HardNetworking
Sep 9, 2025
Which way do I read this, again?
EasyNetworking
Sep 9, 2025
CChit chat.
EasyNetworking
Sep 9, 2025
CI hate extern.
MediumLanguageKnowledge
Sep 9, 2025
CModality of memory.
MediumLanguageKnowledge
Aug 22, 2025
Why am I quicker than you?
EasyNetworking
Aug 22, 2025
TCP Urgent Pointer
HardNetworking
Aug 22, 2025
CIIFE
EasyLanguageKnowledge
Aug 22, 2025
PythonWhat the f
CrackedLanguageKnowledge
Aug 22, 2025
CParents are always right?
EasyLanguageKnowledge
Aug 22, 2025
CAllocation decisions
EasyOperatingSystems
Jul 28, 2025
PythonWheel of misfortune
MediumOperatingSystems
Jul 28, 2025
Linux CFS
EasyOperatingSystems
Jul 28, 2025
You're a snake.
CookedLanguageKnowledge
Jun 19, 2025
COverloading the overload.
MediumLanguageKnowledge
Jun 19, 2025
TLB Miss Handling
EasyOperatingSystems
Jun 19, 2025
CIt's hidden
EasyLanguageKnowledge
Jun 19, 2025
PythonShallow Copy
MediumLanguageKnowledge
Jun 19, 2025
PythonStringy Cereal
MediumLanguageKnowledge
Jun 17, 2025
Inverted Page Tables
CookedOperatingSystems
Jun 17, 2025
IPv4 Header Recalculation
EasyNetworking
Jun 17, 2025
PythonIn Python...
CookedLanguageKnowledge
Jun 17, 2025
MAC Address Overlap
EasyNetworking
Jun 17, 2025
CTemplates and references
EasyLanguageKnowledge
Jun 17, 2025
CDouble trouble?
EasyLanguageKnowledge
Jun 17, 2025
Python__doc__
MediumLanguageKnowledge
Jun 17, 2025
PythonImport test.py
MediumLanguageKnowledge
Jun 16, 2025
CDangerous for-loops.
MediumLanguageKnowledge
Jun 16, 2025
CUnsigned Integer Overflow
EasyLanguageKnowledge
Jun 16, 2025
SYN Flood
CookedNetworking
Jun 16, 2025
Warm and toasty
CookedComputerArchitecture
Jun 16, 2025
ARP-less
EasyNetworking
Jun 16, 2025
Host Multicast Filtering
EasyNetworking
Jun 16, 2025
What does 'JSON' stand for?
CookedLanguageKnowledge
Jun 16, 2025
The birth of the process
CookedOperatingSystems
Jun 16, 2025
Classful Addressing
EasyNetworking
Jun 16, 2025
TCP Connection Termination
MediumNetworking
Jun 16, 2025
Map the cache
MediumComputerArchitecture
Jun 16, 2025
Clock Cycle and Pipeline Depth
EasyComputerArchitecture
Jun 16, 2025
CCall it.
EasyLanguageKnowledge
Jun 16, 2025
Cwtf const
MediumLanguageKnowledge
Jun 16, 2025
Clong vs int
EasyLanguageKnowledge
Jun 16, 2025
Nosy Cache
MediumComputerArchitecture
Jun 5, 2025
CShortcuts
EasyLanguageKnowledge
Jun 5, 2025
CABC. Easy as 123?
EasyLanguageKnowledge
Jun 5, 2025
Split Problems
EasyOperatingSystems
Jun 5, 2025
CWhat even is a string?
MediumLanguageKnowledge
Jun 5, 2025
COverloading ++
EasyLanguageKnowledge
Jun 5, 2025
RustDo you know its size?
MediumLanguageKnowledge
Jun 5, 2025

Progress Overview

CorrectIncorrect