Question

1. which of the following lines correctly declares a variable named city and sets it equal to huntsville? (2 pts)

a. string city = \huntsville\;
b. char city = \huntsville\;
c. string city = huntsville;
d. string city = \huntsville\;
e. char city = huntsville;

1. the following code mixes different data types. will there be an error? (2 pts)

int a=4;
double b=3.3;
int result = 0;

result = a*b;
a. yes
b. no
c. sometimes, but not always

1. its hard to remember the names of all the primitive data types, so we have the mnemonic \bbc shot in long focal distance\ to help. create a mnemonic to help you remember \public static void main (string args)\ (20 pts)

1. memory is structured so that it has:

a. like a word document with only 1 page
b. like an excel table with only 1 column: it has an address and a value
c. like an excel table with 2 rows: it has a column number, a value, and a location
d. like a word document with 2 columns: a value and a row

Explanation:

1. In Java, to declare a string variable named city and assign "Huntsville" to it, the correct syntax is String city = "Huntsville";. The String type (capital 'S') is used for sequences of characters. string (lower - case 's') is not a valid type in Java, char is for single characters and uses single quotes.
2. In Java, when multiplying an int and a double, the int is automatically promoted to a double and the result is a double. But here, the variable result is declared as an int and trying to assign a double value to an int without proper casting will result in a compile - time error.
3. Memory can be thought of as being structured like an Excel table with 2 columns: it has an address and a value. Each memory location has an address and stores a value.

Answer:

1. d. String city = "Huntsville";
2. a. Yes
3. c. Like an Excel table with 2 rows: it has a column address and a value