[Solved] Final Exam

Question 1

Give two examples of Operating Systems.

Question 2

Unicode is a world standard to represent _________________

Question 3

Java is a high-level language

True or false

Question 4

Java is an object-oriented language.

True

False

QUESTION 5

You have successfully compiled the file Hi.java, how do you run the corresponding program from the command line?

		java Hi.java
		java Hi.class
		java Hi
		Hi
		Hi.class

Question 6

A double is more precise than a float.

True

False

Question 7

char values are surrounded by _____ quotes

Question 8

String literals are surrounded by _____ quotes

Question 9

The result of 3.0 / 2 is _________________ .

		1
		1.5
		3
		2
		0

Question 10

If you have written the following source code:

public class SpringBreak
{

// lots of code here
}

then your source code should be saved in a file named _______________

Question 11

What keyword do we use when instantiating an object _________________

		Create
		=
		new
		Object
		is

Question 12

The operations for a class are called _____

Question 13

The special method that we call when instantiating an object is called a _____

Question 14

Write Java statements to instantiate a random number generator object and generate a random integer between 100 and 250 (inclusive).

QUESTION 15

Complete this code in main to perform the requested operations for a date entered by the user in this format: month dd, yyyy

public static void main( String [] args )

{

Scanner scan = new Scanner( System.in );

System.out.print( “Enter a date > ” );

String date = scan.nextLine( );

// a. output the first letter in the month

// b. output the date in all lowercase letters

/* c. output the year portion of the date, that is, the characters in the date that follow the comma. For example, if the date is February 24, 2016, you would output 2016. (Note, your code should work for ANY date in that format.) */

Question 16

Which package is the Graphics class part of? _________________ .

		javax.swing
		java.swing
		java.awt
		javax.awt
		java.graphics

Question 17

The name of the method used to set the current color is _________________

Question 18

Complete the code, drawing a line between points (100, 200) and (34, 67)

public void paint( Graphics g )

{

// your code goes here

}

Question 19

Complete the code, drawing a solid circle (with the current color, whatever it is) so that its diameter is 200, and the coordinates of its center are ( 250, 150 )

public void paint( Graphics g )

{

// your code goes here

}

Question 20

The access modifier of constructors should be _________________

Question 21

When you use a while loop to compute the product of several values, you should initialize the variables holding the product to ______ .

		0
		1
		NULL
		There is no need to initialize it

Question 22

When a loop condition is grade >= 90, what values would you use to test your loop?

		88 and 89
		0 and 90
		89, 90, and 91
		90, 91, and 92
QUESTION 23

What is the output of this code sequence?

for ( int i = 5; i >= 0; i– )

System.out.print( i + ” ” );

System.out.println( );

Question 24

Write a loop to output the word EXAM 99 times

Question 25

To access the number of elements in an array named grades, we use _________________ .

		grades
		grades.size()
		grades.size
		grades.length()
		grades.length

Question 26

Write the code to compute and output how many times the value 99 is found in an array of integers named numbers

Question 27

When processing all the elements of row i of a two-dimensional array named grades using a for loop with variable j, what is the condition of the for loop? _________________ .

		j < length
		j < grades.length
		j <= grades.length
		j < grades[i].length
		j <= grades[i].length

Question 28

The variable numbers is a 2-dimensional array of type int; output all of its elements that are strictly greater than 10

Question 29

What is the error and why is there an error in the code below?

public class XYZ

{

public static final int A = 9;

public abstract void foo1( );

public int foo2( )

{

return 5;

}

}

Question 30

When we read objects from a file using the readObject method, what happens when the end of the file is reached?

Question 31

What is the output of the following sequence?

Scanner scan = new Scanner( System.in );

int number = 0;

try

{

number = scan.nextInt( ); // User enters 12, hits ENTER

System.out.println( “1: ” + number );

number = scan.nextInt( ); // User enters 56, hits ENTER

System.out.println( “2: ” + number );

number = scan.nextInt( ); // User enters 99ABC, hits ENTER

System.out.println( “3: ” + number );

}

catch( Exception e)

{

String s = scan.nextLine( );

System.out.println( “4: ” + number );

}

finally

{

number = scan.nextInt( ); // User enters 100, hits ENTER

System.out.println( “5: ” + number );

}

Question 32

In the BorderLayout class, what are NORTH, SOUTH, EAST, WEST, and CENTER?