MCQs on Deployment and Performance Optimization | Go

In Go, building and deploying efficient binaries, profiling with pprof, and optimizing memory and CPU usage are critical for building high-performance applications. This guide explores these essential topics in Go development.

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1. Building and Deploying Go Binaries

1. What is the command to build a Go binary?
   a) go build
   b) go run
   c) go install
   d) go compile
2. How do you build a Go binary for a specific OS and architecture?
   a) go build -o binary_name
   b) go build -os=linux -arch=amd64
   c) go target -os=linux
   d) go build –platform=linux-amd64
3. What command is used to install a Go package?
   a) go install
   b) go build
   c) go get
   d) go download
4. Which file extension is used for Go binaries on Linux?
   a) .go
   b) .exe
   c) .bin
   d) No extension
5. How do you create a statically linked Go binary?
   a) go build -static
   b) go build -ldflags “-extldflags ‘-static'”
   c) go build -static-link
   d) go static build
6. Which command can be used to cross-compile a Go binary for different platforms?
   a) go crosscompile
   b) go build -platform
   c) GOOS=linux GOARCH=amd64 go build
   d) go build –cross
7. How do you compile Go code with debugging symbols included?
   a) go build -debug
   b) go build -ldflags “-w -s”
   c) go build -v
   d) go build -d
8. Which environment variables are used to target a specific operating system and architecture in Go?
   a) GOOS and GOARCH
   b) GO_PLATFORM and GO_ARCH
   c) TARGET_OS and TARGET_ARCH
   d) GO_TARGET and GO_ENV
9. What is the purpose of the go install command?
   a) It installs the Go package dependencies
   b) It compiles and installs the Go binary into the workspace
   c) It builds the package but does not install
   d) It installs a Go package globally
10. How can you strip debugging information from a Go binary?
    a) go build -ldflags “-s -w”
    b) go build -strip-debug
    c) go build -o binary -strip
    d) go strip-debug

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2. Profiling with pprof

11. Which package is used for profiling in Go?
    a) pprof
    b) profiling
    c) go-profile
    d) benchmark
12. How do you import the pprof package in a Go program?
    a) import “net/pprof”
    b) import “github.com/pprof”
    c) import “go/pprof”
    d) import “net/http/pprof”
13. How do you start profiling CPU usage in a Go program?
    a) pprof.StartCPUProfile()
    b) pprof.Start()
    c) cpuProfile.Start()
    d) StartProfile(pprof)
14. What is the default port used by the pprof HTTP server in Go?
    a) 8000
    b) 9090
    c) 6060
    d) 8080
15. How do you stop the CPU profiling in Go?
    a) pprof.StopCPUProfile()
    b) pprof.EndProfile()
    c) cpuProfile.Stop()
    d) StopProfile(pprof)
16. What command is used to generate a CPU profile using pprof?
    a) go tool pprof -cpu profile.prof
    b) go pprof generate cpu_profile
    c) go tool pprof -text
    d) go tool pprof -cpu <profile_file>
17. Which command can be used to display the heap profile?
    a) pprof display heap
    b) go tool pprof -heap
    c) go tool pprof -mem
    d) go tool pprof -heap_profile
18. How can you view the heap profile of a Go program?
    a) go run -memprofile=heap.prof
    b) go tool pprof heap
    c) curl http://localhost:6060/debug/pprof/heap
    d) go profile -heap
19. Which of the following is the correct method to add pprof to your application?
    a) Import net/http/pprof
    b) Import pprof/http
    c) Import go/pprof
    d) Import pprof
20. What is the purpose of the pprof tool in Go?
    a) It helps monitor memory usage
    b) It generates binary executables
    c) It provides performance profiling tools
    d) It runs unit tests

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3. Memory and CPU Optimization Techniques

21. Which technique helps optimize memory usage in Go?
    a) Garbage Collection
    b) Memory pools
    c) Caching
    d) All of the above
22. What is the effect of enabling Go’s garbage collection?
    a) It automatically frees up unused memory
    b) It reduces memory usage significantly
    c) It increases memory usage
    d) It prevents memory leaks
23. Which of the following can help reduce memory allocations in Go?
    a) Using buffered channels
    b) Using slices and arrays efficiently
    c) Avoiding unnecessary copies of data
    d) All of the above
24. What is the role of the sync.Pool type in Go?
    a) It is used to optimize memory usage by reusing objects
    b) It handles garbage collection automatically
    c) It helps in concurrent memory management
    d) It reduces the CPU usage
25. Which of the following is a common CPU optimization technique in Go?
    a) Parallel processing
    b) Using memory-mapped files
    c) Implementing caching algorithms
    d) All of the above
26. How does the Go runtime optimize CPU usage during concurrent execution?
    a) By using goroutines
    b) By using system threads
    c) By using CPU affinity
    d) By distributing workloads across multiple cores
27. What command can be used to view the CPU usage profile in Go?
    a) go tool pprof -cpu
    b) go tool pprof cpu.profile
    c) go cpu-profile
    d) pprof -cpu-profile
28. What is a good strategy for reducing memory usage in Go?
    a) Minimizing the number of allocations
    b) Reducing the number of goroutines
    c) Keeping data in a memory-mapped file
    d) Both a and b
29. Which is a best practice for managing memory in Go?
    a) Use value types whenever possible
    b) Use pointers for large objects
    c) Avoid creating large slices in loops
    d) All of the above
30. How can you profile CPU performance in Go?
    a) Using go tool pprof
    b) Using pprof.CPUProfile()
    c) Using the go profiler
    d) Using cpu.profiler

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Answers Table

QNo	Answer (Option with Text)
1	a) go build
2	b) go build -os=linux -arch=amd64
3	c) go get
4	d) No extension
5	b) go build -ldflags “-extldflags ‘-static'”
6	c) GOOS=linux GOARCH=amd64 go build
7	b) go build -ldflags “-w -s”
8	a) GOOS and GOARCH
9	b) It compiles and installs the Go binary into the workspace
10	a) go build -ldflags “-s -w”
11	a) pprof
12	d) import “net/http/pprof”
13	a) pprof.StartCPUProfile()
14	c) 6060
15	a) pprof.StopCPUProfile()
16	a) go tool pprof -cpu profile.prof
17	b) go tool pprof -heap
18	c) curl http://localhost:6060/debug/pprof/heap
19	a) Import net/http/pprof
20	c) It provides performance profiling tools
21	d) All of the above
22	a) It automatically frees up unused memory
23	d) All of the above
24	a) It is used to optimize memory usage by reusing objects
25	d) All of the above
26	a) By using goroutines
27	b) go tool pprof cpu.profile
28	d) Both a and b
29	d) All of the above
30	a) Using go tool pprof