Go Quiz — 7 Free Questions

Question 1

What is the purpose of Go's "sort" package?

Question 2

What is the purpose of Go's "blank identifier", the underscore "_"?

Question 3

What is the purpose of a Go "benchmark" function, such as "func BenchmarkAdd(b *testing.B) { ... }"?

Question 4

What is Go's "generics" feature, introduced in Go 1.18, primarily used for?

Question 5

What is the purpose of the Go "strconv" package?

Question 6

What does Go's "errors.New()" function do?

Question 7

What is the idiomatic Go way of handling an error returned from a function call?

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About Go

Go, often called Golang to make it easier to search for online, was created inside Google in 2009 by a small team that included Robert Griesemer, Rob Pike, and Ken Thompson, the latter one of the original creators of the Unix operating system decades earlier. Their goal was refreshingly practical: a language simple enough to learn in an afternoon, but fast to compile and genuinely good at handling many things happening at once, a real pain point in the large C++ codebases Google was maintaining at the time.

That emphasis on simplicity was deliberate and almost aggressive. Go's entire language specification is short enough to read in one sitting, a direct reaction against the growing complexity of languages like C++, and the language ships with its own built-in formatting tool, gofmt, which effectively ends most arguments about code style before they can even start, since there's really only one accepted way to format Go code.

Go's approach to concurrency, built around lightweight units called goroutines and a communication mechanism called channels, made it dramatically easier to write programs that do many things simultaneously without the tangled, error-prone threading code that languages like Java or C++ traditionally required.

That focus on simplicity and concurrency turned out to be perfectly suited for the cloud-infrastructure era that followed shortly after Go's release. Two of the most important pieces of modern cloud software, Docker and Kubernetes, are themselves written in Go, which says a lot about how well the language fits the exact class of problems it was designed to solve.

Go's mascot, a friendly blue gopher, has become one of the more recognizable symbols in programming language communities, showing up on stickers, conference T-shirts, and community projects everywhere.

Companies that needed to move fast without sacrificing performance, including Uber, Twitch, and Dropbox, have all adopted Go for major backend systems, in some cases specifically migrating away from Python for performance-critical services, and Go's notoriously fast compile times remain a genuine, practical selling point for large engineering teams working on sprawling codebases.

Go has found a particularly strong following in the blockchain and cryptocurrency space too, with major projects choosing it specifically for the same performance and concurrency characteristics that made it attractive to cloud infrastructure teams in the first place, handling large numbers of simultaneous network connections without the complexity that comes with manually managing threads.

Benchmark comparisons between Go and other backend languages have also become something of a recurring topic in the developer community, and while raw performance depends heavily on the specific workload being tested, Go consistently lands close to lower-level languages like C++ on many common server-side tasks, while requiring noticeably less code and complexity to get there.

Go's standard library is also unusually complete for a relatively young language, shipping with built-in support for things like HTTP servers, cryptography, and JSON handling that many other languages only get through third-party packages, a deliberate design decision that reduces how many external dependencies a typical Go project needs to pull in just to accomplish common, everyday tasks.