The Qiita Advent Calendar 2020 is supported by the following companies, organizations, and services.

Advent Calendar 2020 / Programming language

Goクイズ Advent Calendar 2020

Participant13People

Subscriber73People

Category：Programming language

Creator：

@tenntenn

これはなに？

Goのクイズを出題しその解説を書くアドベントカレンダーです！！

出題テンプレート


以下のコードを実行するとどうなるか？

```go
package main
func main() {
    true := false
    println(true == false)
}
```

1. コンパイルエラー
2. `true`と表示される
3. `false`と表示される
4. パニックが発生する

<details><summary&gt回答と解説</summary>
ここに回答と解説を書く
</details>

出題のポイント

短いコードにする
なるべく、言語仕様に書いてないことを問題にしない
4択ぐらいにする
すべての選択肢を取りうる罠を用意し筋書きを作る
自分がハマったバグとかを参考に作る
難しい問題を作ろうと気合を入れすぎない

クイズの例

http://bit.ly/goquiz-tenntenn

Sun	Mon	Tue	Wed	Thu	Fri	Sat
29	30	@tenntenn ウォーミングアップだ！ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@nobishii Goクイズ Advent Calendar 2020/12/2 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@syumai シンプルな一問です Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@task4233 Goクイズ Advent Calendar Day4 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@hajimehoshi Go Quiz: map Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
@zr_tex8r Goのnilに関するヤヤコシイ話 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@hajimehoshi Go Quiz: math.Pow と NaN Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@kmtr やさしめのGo Quiz Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@kmtr 続やさしめのGo Quiz Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@syumai iotaです Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@DQNEO importを書いて良い場所は？ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@makiuchi-d deferで穴埋め Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
@tenntenn 中ボス Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@shumon_84 Goクイズアドベントカレンダー 14日目 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@hajimehoshi Go Quiz: len と定数 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@nobishii 解説考えてたら別な問題ができました Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@syumai メソッド値です Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@acomagu v == v が false 編 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@tenntenn ブランク識別子 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
@zr_tex8r Goの定数がヤヤコシイ話 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@hajimehoshi Go Quiz: 未使用変数 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@kmutxx Functional Optionのネスト Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@binzume Goクイズ: int = float64 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@task4233 Goクイズ: Type assertions Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@tenntenn ラスボスだ！ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	26

	@tenntenn ウォーミングアップだ！ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@nobishii Goクイズ Advent Calendar 2020/12/2 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@syumai シンプルな一問です Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@task4233 Goクイズ Advent Calendar Day4 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@hajimehoshi Go Quiz: map Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@zr_tex8r Goのnilに関するヤヤコシイ話 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@hajimehoshi Go Quiz: math.Pow と NaN Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@kmtr やさしめのGo Quiz Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@kmtr 続やさしめのGo Quiz Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@syumai iotaです Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@DQNEO importを書いて良い場所は？ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@makiuchi-d deferで穴埋め Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@tenntenn 中ボス Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@shumon_84 Goクイズアドベントカレンダー 14日目 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@hajimehoshi Go Quiz: len と定数 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@nobishii 解説考えてたら別な問題ができました Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@syumai メソッド値です Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@acomagu v == v が false 編 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@tenntenn ブランク識別子 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@zr_tex8r Goの定数がヤヤコシイ話 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@hajimehoshi Go Quiz: 未使用変数 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@kmutxx Functional Optionのネスト Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@binzume Goクイズ: int = float64 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@task4233 Goクイズ: Type assertions Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@tenntenn ラスボスだ！ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use

Sun	Mon	Tue	Wed	Thu	Fri	Sat
29	30	@tenntenn ウォーミングアップだ！ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@nobishii Goクイズ Advent Calendar 2020/12/2 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@syumai シンプルな一問です Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@task4233 Goクイズ Advent Calendar Day4 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@hajimehoshi Go Quiz: map Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
@zr_tex8r Goのnilに関するヤヤコシイ話 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@hajimehoshi Go Quiz: math.Pow と NaN Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@kmtr やさしめのGo Quiz Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@kmtr 続やさしめのGo Quiz Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@syumai iotaです Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@DQNEO importを書いて良い場所は？ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@makiuchi-d deferで穴埋め Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
@tenntenn 中ボス Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@shumon_84 Goクイズアドベントカレンダー 14日目 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@hajimehoshi Go Quiz: len と定数 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@nobishii 解説考えてたら別な問題ができました Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@syumai メソッド値です Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@acomagu v == v が false 編 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@tenntenn ブランク識別子 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
@zr_tex8r Goの定数がヤヤコシイ話 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@hajimehoshi Go Quiz: 未使用変数 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@kmutxx Functional Optionのネスト Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@binzume Goクイズ: int = float64 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@task4233 Goクイズ: Type assertions Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	@tenntenn ラスボスだ！ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use	26

	@tenntenn ウォーミングアップだ！ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@nobishii Goクイズ Advent Calendar 2020/12/2 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@syumai シンプルな一問です Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@task4233 Goクイズ Advent Calendar Day4 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@hajimehoshi Go Quiz: map Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@zr_tex8r Goのnilに関するヤヤコシイ話 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@hajimehoshi Go Quiz: math.Pow と NaN Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@kmtr やさしめのGo Quiz Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@kmtr 続やさしめのGo Quiz Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@syumai iotaです Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@DQNEO importを書いて良い場所は？ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@makiuchi-d deferで穴埋め Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@tenntenn 中ボス Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@shumon_84 Goクイズアドベントカレンダー 14日目 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@hajimehoshi Go Quiz: len と定数 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@nobishii 解説考えてたら別な問題ができました Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@syumai メソッド値です Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@acomagu v == v が false 編 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@tenntenn ブランク識別子 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@zr_tex8r Goの定数がヤヤコシイ話 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@hajimehoshi Go Quiz: 未使用変数 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@kmutxx Functional Optionのネスト Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@binzume Goクイズ: int = float64 Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@task4233 Goクイズ: Type assertions Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use
	@tenntenn ラスボスだ！ Overwrite Title URL You can post either your article on Qiita or your blog post. When you participate, we will assume that you have agreed to the terms of use

The Qiita Advent Calendar 2020 is supported by the following companies, organizations, and services.