60 lines
1.3 KiB
Markdown
60 lines
1.3 KiB
Markdown
# Strings, Runes and Bytes Quiz
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## Which byte slice below equals to the "keeper" string?
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```go
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// Here are the corresponding code points for the runes of "keeper":
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// k => 107
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// e => 101
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// p => 112
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// r => 114
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```
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1. []byte{107, 101, 101, 112, 101, 114} *CORRECT*
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2. []byte{112, 101, 101, 112, 114, 101}
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3. []byte{114, 101, 112, 101, 101, 112}
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4. []byte{112, 101, 101, 114, 107, 101}
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## What does this code print?
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```go
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// Code points:
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// g => 103
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// o => 111
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fmt.Println(string(103), string(111))
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```
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1. 103 111
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2. g o *CORRECT*
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3. n o
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4. "103 111"
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## What does this code print?
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```go
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const word = "gökyüzü"
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bword := []byte(word)
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// ö => 2 bytes
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// ü => 2 bytes
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fmt.Println(utf8.RuneCount(bword), len(word), len(string(word[1])))
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```
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1. 7 10 2 *CORRECT*
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2. 10 7 1
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3. 10 7 2
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4. 7 7 1
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## Which one below is true?
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1. for range loops over the bytes of a string
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2. for range loops over the runes of a string *CORRECT*
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## For a utf-8 encoded string value, which one below is true?
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1. runes always start and end in the same indexes
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2. runes may start and end in different indexes *CORRECT*
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3. bytes may start and end in different indexes
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## Why can't you change the bytes of a string value?
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1. Strings values are immutable byte slices
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2. Strings are used a lot so they are being shared behind the scenes
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3. All of above *CORRECT* |