Review Questions for Exam 1

Statements used to make the code more understandable to someone reading it ________

The _______________ translates byte code into machine language and executes it

The physical, tangible parts of a computer are called ______________________

The data type used to store whole numbers _________________

A single binary digit (0 or 1) is called a _______________

2) List four different primitive data types that we’ve learned, and give a brief description of the values that can be stored in each type. (4 pts)

3) What is the Internet? What is the world wide web? Be sure to differentiate the two terms. (3 pts)

4) Describe three programming conventions/style recommendations that make your source code easier to read and understand. (3 pts)

5) What are the results of the following expressions? All of the values used in the expressions are integers. (2 pts)

a) 2 + 3 % 3 =>

b) 6 + 1 / (2 + 3) – (4 * 3) =>

6) For each of the following expressions, indicate the order in which the operators will be evaluated by writing a number beneath each operator. (2 pts)

a) 3 % (2 / 3) / 4 =>

b) 5 + 10 / 3 * 4 – 2 % 3 =>

7) Given the following declarations, what result is stored in each of the listed assignment statements? (2 pts)

int iResult, num1 = 10, num2 = 5, num3 = 3;

double fResult, val1 = 10.0, val2 = 5.0, val3 = 3.0;

a) iResult = num1 / num3;

b) fResult = num1 / num3;

c) iResult = num1 / val3;

d) fResult = (int) num1 / val3;

8) What is the output produced by the following code segments? Be precise in your answers!

System.out.println("\"The generation of random numbers is too" +

"important to be left to chance.\"");

System.out.println("\tRobert R. Coveyou");

total = 3;

length = 2;

length += 12;

total = length * 2 + Math.pow(total,2);

System.out.print("The total is: " + total);

String m1, m2, m3;

m1 = "Programming is FUN! ";

m2 = m1.toLowerCase();

m3 = m2 + " " + m1;

System.out.println(m3);

System.out.println(m1.substring(15,18) + ", I say!");

NumberFormat fmt1 = NumberFormat.getCurrencyInstance();

float price = 1008.99;

System.out.println ("Price: " + fmt1.format(price));

9) Write Java statements to accomplish the following:

a) Assign the product of w and the sum of x and y to z

b) Declare and instantiate an object of the Random class. Declare an integer variable. Generate a random number between 2 and 20 and assign it to the integer variable. Use variable identifiers of your own choosing.

c) Declare and instantiate an object of the Scanner class to read input from the keyboard. Read in the user’s first name and their age, then use the values obtained from the user to display a sentence of the form Jocelyn is 8 years old. (Your output does not need to be in italics!) Use appropriate prompts for the user. Declare all variables.