Question 1:

The process method in the excerpt below must be non-static.

MyType obj1 = new MyType(); obj1.process("somefile.txt");

Question 2:

The send method in the excerpt below must be static.

MyType obj1 = new MyType();

MyType.send(obj1);

Question 3:

The code excerpt below declares an instance variable as final without immediately assigning it a value (the code attempts to set its value in the constructor). This is valid.

public class ConnectionManager {

private final int maxConnections;

public ConnectionManager(int maxConnections) {

this.maxConnections = maxConnections;

}

// ...

}

Question 4:

What is the value of x after the following statement is executed?

double x = Math.floor(Math.abs(Math.ceil(3.1) + Math.floor(12.99) - 20.5));

Note:

• If the answer is a real number (a rational number that is not an integer... the sort of stuff we'd normally store in a float or double) it should be rounded to display only 1 digit to the right of the decimal. That is, an answer of 7.314 should be entered of 7.3 and an answer of 7.553 should be entered as 7.6.

Question 5:

You ______ an item onto a stack to add it, and _____ an item off of a stack to remove it.

Question 6:

A _______ is a last-in, first-out (LIFO) data structure.

Question 7:

Select those code excerpts below that are valid.

		public static void main(String args[]) { promo(21.7); } static void promo(int param) { // ... }
		public static void main(String args[]) { float discount = 10.5f; promo(discount); } static void promo(double param) { // ... }
		public static void main(String args[]) { promo(10.5); } static void promo(float param) { // ... }
		public static void main(String args[]) { promo(10); } static void promo(float param) { // ... }
		public static void main(String args[]) { promo((int) 21.7); } static void promo(int param) { // ... }

Question 8:

The nextInt method in the Random class produces truly random (i.e. nondeterministic) values such that every value in the range (-2,147,483,648 to +2,147,483,647 inclusive) has an equal chance (probability) of being chosen each time nextInt is called.

True or False?

Question 9:

Select the true statements below

		enumerations are a special kind of class
		enumerations are introduced (declared) using the keyword boundedtype
		The names of all enumeration constants must use only uppercase letters
		The body of an enumeration contains a comma-separated list of enumeration constants, each representing a unique value
		Use of enumeration constants (like Mood.HAPPY, Mood.SAD, and Mood.HEAVILYMEDICATED) in place of literal values (such as 0, 1 and 2) may make code easier to read and maintain

Question 10:

The following code excerpt is valid demonstration of method overloading:

static int downcast(double arg) {

return (int) arg;

}

static float downcast(double arg) {

return (float) arg;

}

True or False?