Final Knowledge Check

A mixed quiz covering the whole course. Aim for 100% before calling yourself done.

Section 1 — Language Core

#

Which is a valid short variable declaration?

var x := 5

x := 5

let x = 5

int x = 5

#

What is the zero value of a string?

nil

null

""

0

#

Does Go support while loops?

Yes, while cond {}

No — for cond {} is the while-equivalent

Only inside main

Only with goto

Section 2 — Data Structures

#

What does make([]int, 3, 10) create?

Length 10, capacity 3

Length 3, capacity 10

A compile error

A 3×10 matrix

#

Writing to a nil map causes a…

Silent no-op

Panic

Compile error

Automatic allocation

#

To mutate a struct inside a method, use a…

value receiver

pointer receiver

global variable

mut keyword

Section 3 — Advanced

#

Go interfaces are implemented…

With an implements clause

Implicitly, by satisfying the method set

Via inheritance

Through generics

#

How should you return a failure from a function?

throw new Error(...)

panic for everything

Return (value, error) with error as the last return

Set a global errno

#

What is the Go proverb about shared memory?

"Lock everything, always"

"Don't communicate by sharing memory; share memory by communicating"

"Goroutines are threads"

"Channels are optional"

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