Questions

1. What is the name of the method to get the size of an array?
2. How do you find the capacity of the slice?
3. How do you initialize the 2D slice of a string type?
4. How do you add an element to the slice?
5. Using code, can you demonstrate how to create a map of key strings and value strings? Initialize the map with keys and values in the code, iterate them in a loop, and print the keys and values in the code.

1.  How do you delete a value in a map?
2. What parameters are required for getting a database connection?
3. Which sql.Rows class method makes it possible to read the attributes of the entity in a table?
4. What does defer do when a database connection is closed?
5. Which method allows the sql.DB class to create a prepared statement?