Backend Quiz 2 - variable declaration

Is the following a valid way of initializing and assigning a value to a variable?
var bookTitle string = "Harry Potter"

• Yes

• No

• Only sometimes

Is the following a valid way of initializing an assigning a value to a variable?
fruitCount := 5

• Yes

• No

• Only sometimes

After running the following code, Go will assume that the variable
quizQuestionCount
is of what type?
quizQuestionCount := 10

• Float

• Integer

• String

• Map

Will the following code compile? Why or why not?
paperColor := "Green"
paperColor := "Blue"

• Yes, because we are creating and assigning a value to the variable 'paperColor' twice.

• No, because a variable can only be initialized one time. In this case, the ':=' operator is being used to initialize 'paperColor' two times

• No, because ':=' is not a valid operator

Are the two lines following ways of initializing the variable 'pi' equivalent?
pi := 3.14
var pi float64 = 3.14

• Yes

• No

This might require a bit of experimentation on your end :).  Remember that you can use the Go Playground at https://play.golang.org/ to quickly run a snippet of code.

Is the following code valid?

1. ^{package main}

2.  

3. ^{import "fmt"}

4.  

5. ^{deckSize := 20}

6.  

7. ^{func main() {}

8. ^{fmt.Println(deckSize)}

9. ^}

• Yes

• No

We might be able to initialize a variable and then later assign a variable to it.  Is the following code valid?

package main

1.  

2. import "fmt"

3.  

4. func main() {

5. var deckSize int

6. deckSize = 52

7. fmt.Println(deckSize)

8. }

• Yes

• No

Here's another one that might need some testing on your end! Remember that you can use the Go Playground at https://play.golang.org/ to quickly run a snippet of code.

Is the following code valid?

1. package main

2.  

3. import "fmt"

4.  

5. var deckSize int

6.  

7. func main() {

8. deckSize = 50

9. fmt.Println(deckSize)

10. }

• Yes

• No

Is the following code valid?  Why or why not?

1. package main

2.  

3. import "fmt"

4.  

5. func main() {

6. deckSize = 52

7. fmt.Println(deckSize)

8. }

• Yes, because deckSize is assigned a value before it is passed to the 'fmt.Println' function

• No, because 'deckSize' is assigned a value before it is initialized