GO Intermediate Quiz 3

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Quiz 3
1. Are Go maps safe for concurrent use?
2. What is a 'Mutex' used for?
3. What is the zero value of an 'error' type?
4. What is 'Type Assertion' used for?
5. What does the 'new()' function return?
6. Every Go file must start with which statement?
7. What is the '_' character called in Go?
8. What does 'sync.WaitGroup' do?
9. Can you use 'break' with a label in Go?
10. What is a 'nil' slice?
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