SECTION A
Answers for this section must be written on the multiple-choice answer sheet (machine-readable form).
Question 1 [2%]
Which of the following is NOT a primitive data type in Java?
char
double
int
number
Question 2 [2%]
What output will be produced by the following Java program?
boolean a = true; boolean b = false; a = a && b;
b = ! b;
System.out.println(a + " " + b);
false false
false true
true false
true true
Question 3 [2%]
What output will be produced by the following Java program?
int a = 1; int b = 1;
while (a * b < 10) { a += b;
if (a == 4)
continue;
b++;
}
System.out.println(a + b);
7
8
9
10
Question 4 [2%]
Which of the following lines declares a constant holding the value 42 in Java?
static final int ANSWER = 42;
static const int ANSWER = 42;
static final ANSWER = 42;
static const ANSWER = 42;
Question 5
A programmer has written a method which takes as its argument an array of integers and returns a new array with the same elements but in reverse order. Unfortunately one of the lines in the program has gone missing:
public static int[] revIntArray(int[] array) { int[] result = new int[array.length]; int index = array.length - 1;
for (int a : array) { result[index] = a;
// MISSING A LINE HERE
}
return result;
}
Which of the following lines should be inserted so that the method works correctly?
[A] index++;
index-= 1;
a++;
[D] a -= 1;
Question 6 [2%]
What output will be produced by the following Java program?
int[][] alpha = { {1, 2, 3 }, { 4, 5, 6 }};
int[] beta = alpha[0]; beta[1] = alpha[1][2];
System.out.println(alpha[0][1] + alpha[1][0]);
6
8
10
12
Question 7 [2%]
Consider the following Java program
public class MainTest {
public static void main(String[] args) { if (args.length > 0)
System.out.println(main(args[0]));
}
public static String main() { return "Hello ";
}
public static String main(String x) { return main() + x;
}
}
Which of the following statements is true?
The program will not compile because you cannot have methods with the same name in one
When the program is run without a command line argument, it will throw a
StackOverflow exception.
When the program is run without a command line argument, it will exit without displaying a message or throwing an
When the program is run with the command line argument Jim, the console will display the message Hello Jim!
Question 8 [2%]
Which of the following is NOT a java.util.Scanner method?
getNext
hasNext
next
nextDouble
Question 9 [2%]
In the context of Java graphics programming, which of the following statements is true?
Class JComponent has a paintComponent method that can be overridden in subclasses.
The bottom-left corner of a window has coordinates (0,0)
Class JFrame has a drawOval method for drawing an ellipse or circle.
The constructor invocation new JFrame("Hello World") will create a window with a content pane that shows the text "Hello World"
Question 10 [2%]
Which of the following statements about Java classes is false?
A class can have several
Classes can override the ==
Classes can override method toString
Within a constructor, this is a reference to the current object which is being
Question 11 [2%]
Which of the following statements about Java access levels is false?
A private method can access a public field of another
A private method can only be accessed in its own class.
A method without explicit access level is visible from the same
A private data field can be read but not modified from outside the
Question 12 [2%]
Which interface does a Java class C need to implement in order for the method invocation
Arrays.sort(xs) to work properly where xs is an array of C elements?
Order
Comparator
Ordering
Comparable
Question 13
Consider the following statements about interfaces in Java:
All methods declared in an interface are automatically public
A class may implement at most one
Both statements are
The first statement is true; the second is
The first statement is false; the second is
Both statements are
Question 14 [2%]
Assume that List and ArrayList have been imported from package java.util
Which of the following statements does NOT compile?
List<Integer> a = new ArrayList<>();
List b = new ArrayList<Integer>();
ArrayList c = new ArrayList<Integer>();
ArrayList<Integer> d = new List<Integer>();
Question 15 [2%]
Which of the following statements about Java class Object is false?
In the absence of any other explicit superclass, every class is implicitly a subclass of
Object
Class Object has an equals method that compares objects for identity.
Class Object has a toString method that prints the name and value of all
Class Object is the only class which has no parent class.
CS 340 Milestone One Guidelines and Rubric Overview: For this assignment, you will implement the fundamental operations of create, read, update,
Retail Transaction Programming Project Project Requirements: Develop a program to emulate a purchase transaction at a retail store. This
7COM1028 Secure Systems Programming Referral Coursework: Secure
Create a GUI program that:Accepts the following from a user:Item NameItem QuantityItem PriceAllows the user to create a file to store the sales receip
CS 340 Final Project Guidelines and Rubric Overview The final project will encompass developing a web service using a software stack and impleme
