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Coding Challenges
5,893 curated questions across every arena — browse by topic, then jump into a live 3-minute battle to put them to the test.
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476 challenges matching your filters
Clear topic filter- Multiple ChoiceIntermediate
Go: json.Marshal
gointermediate - Multiple ChoiceIntermediate
Go: json tags (i31)
gointermediate - Multiple ChoiceIntermediate
Go: net/http — Timeouts
gointermediate - Multiple ChoiceIntermediate
Go: http.HandleFunc
gointermediate - Multiple ChoiceIntermediate
Go: io.Reader
gointermediate - Multiple ChoiceIntermediate
Go: io.Writer
gointermediate - Multiple ChoiceIntermediate
Go: os.Open
gointermediate - Multiple ChoiceIntermediate
Go: bufio.Scanner
gointermediate - Multiple ChoiceIntermediate
Go: strconv.Itoa
gointermediate - Multiple ChoiceIntermediate
Go: strings.Contains
gointermediate - Multiple ChoiceIntermediate
Go: sort.Ints
gointermediate - Multiple ChoiceIntermediate
Go: time.Now
gointermediate - Multiple ChoiceIntermediate
Go: time.Sleep
gointermediate - Multiple ChoiceIntermediate
Go: Testing
gointermediate - Multiple ChoiceIntermediate
Go: Table Tests — Subtests
gointermediate - Multiple ChoiceIntermediate
Go: _test.go
gointermediate - Multiple ChoiceIntermediate
Go: init() — Import Order
gointermediate - Multiple ChoiceIntermediate
Go: Package Alias
gointermediate - Multiple ChoiceIntermediate
Go: Blank Import
gointermediate - Multiple ChoiceIntermediate
Go: GOPATH vs Modules
gointermediate - Multiple ChoiceIntermediate
Go: go get
gointermediate - Multiple ChoiceBeginner
Go: reflect.TypeOf
gomcqbeginner - Multiple ChoiceBeginner
Go: Build tags //go:build
gomcqbeginner - Multiple ChoiceBeginner
Go: cgo purpose
gomcqbeginner - Multiple ChoiceBeginner
Go: Module path is
gomcqbeginner - Multiple ChoiceBeginner
Go: go mod vendor
gomcqbeginner - Multiple ChoiceHard
Context Cancellation
gomcqhard - Multiple ChoiceBeginner
defer Order
gomcqbeginner - Multiple ChoiceHard
Goroutine Leaks
gomcqhard - Multiple ChoiceHard
Typed Nil Interface
gomcqhard - Multiple ChoiceIntermediate
Nil Map Write
gomcqintermediate - Multiple ChoiceIntermediate
Race Detector
gomcqintermediate - Multiple ChoiceIntermediate
select default
gomcqintermediate - Multiple ChoiceIntermediate
Slice Capacity
gomcqintermediate - Multiple ChoiceIntermediate
strings.Builder
gomcqintermediate - Multiple ChoiceIntermediate
Value vs Pointer Receiver
gomcqintermediate - Code AnalysisBeginner
Append to Nil Slice
code-analysisGolanguage - Code AnalysisIntermediate
Close Channel Read
code-analysisGolanguage - Code AnalysisBeginner
Copy Min
code-analysisGolanguage - Code AnalysisIntermediate
Defer LIFO
code-analysisGolanguage - Code AnalysisBeginner
For Range String
code-analysisGolanguage - Code AnalysisBeginner
Function Variable
code-analysisGolanguage - Code AnalysisHard
Goroutine Capture
code-analysisGolanguage - Code AnalysisBeginner
Interface Conversion
code-analysisGolanguage - Code AnalysisHard
Iota Math
code-analysisGolanguage - Code AnalysisBeginner
Map Comma OK
code-analysisGolanguage - Code AnalysisHard
Named Return Shadow
code-analysisGolanguage - Code AnalysisHard
Nil Interface Trap
code-analysisGolanguage - Code AnalysisBeginner
Nil Slice Len
code-analysisGolanguage - Code AnalysisHard
Panic with Defer
code-analysisGolanguage - Code AnalysisHard
Range Pointer Trap
code-analysisGolanguage - Code AnalysisBeginner
Short Var Scope
code-analysisGolanguage - Code AnalysisHard
Slice Capacity Sharing
code-analysisGolanguage - Code AnalysisBeginner
String Immutability
code-analysisGolanguage - Code AnalysisIntermediate
Switch No Expression
code-analysisGolanguage - Code AnalysisHard
Type Assert Panic
code-analysisGolanguage - Multiple ChoiceIntermediate
[Go] Unbuffered Typed communication between goroutines
qagogoqa - Multiple ChoiceIntermediate
[Go] Buffered Typed communication between goroutines
qagogoqa - Multiple ChoiceIntermediate
[Go] Close Typed communication between goroutines
qagogoqa - Multiple ChoiceIntermediate
[Go] Select Typed communication between goroutines
qagogoqa
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