The following truth table matches which boolean condition? AB?
111
101
010
001
A && ( A || B)
A || ( !A && !B)
A && ( A && B)
!A && ( A || !B)
A || ( A || B)
Consider the following class:
public class Thingy implements Comparable {
private int val;
public Thingy() {
this(0);
}
public Thingy(int t) {
val = t;
}
}
Which of the following methods must be included so this class can be instantiated?
a. compareTo
b. equals
c. indexOf
d. size
e. toString
Assume that x and y are boolean variables and have been properly initialized.
(x || y) && !(x && y)
The result of evaluating the expression above is best described as:.
A. Always true
B. Always false
C. True only when x is true and y is true
D. True only when x and y have the same value
E. True only when x and y have different values
You have created the following set of classes: Bus, Car, Scooter, Train, and Vehicle. Which would you choose to be the abstract class?
A. Bus
B. Car
C. Scooter
D. Train
E. Vehicle
Consider the method definition:
public static String analyzeTemps(int temps [], int avg) {
int above = 0;
int below = 0;
for(int i =0; i < temps. length; i++) {
if (temps[i] > avg)
above++;
if (temps[i] < avg)
below++;
}
if (above > below)
return "Hotter than normal";
if (above < below)
return "Cooler than normal";
return "Temperatures normal";
}
What is returned by the following?
int temps [] = {82 , 73 , 77 , 79 , 86 , 88 , 76 , 78 , 83};
System. out. println(analyzeTemps(temps, 81));
4
5
Cooler than normal
Hotter than normal
Temperatures normal
Consider the following code:
int list [] = /* missing code */;
int val = /* missing code */;
int n = -1;
for (int i = 0; i < list. length; i++) {
if (val == list[i]) {
n = i;
break;
}
}
What algorithm is shown?
A. Binary Search
B. Insertion Sort
C. Merge Sort
D. Selection Sort
E. Sequential Search
Suppose a child class has overridden a method of its parent class. What key word does the child class use to access the method in the parent class?
a. child
b. parent
c. static
d. super
e. this
What two methods from Object are often overridden?
a. add, compareTo
b. add, remove
c. toString, add
d. toString, equals
e. toString, compareTo
Consider the following class:
public class FrozenDesert{
public FrozenDesert() {
System. out. println("Yum");
}
}
You write a class, FrozenYogurt, which extends FrozenDesert. Which of the following is a correct implementation of the constructor for FrozenYogurt?
I. public FrozenYogurt() {
System. out. println("I'm the new ice cream");
super();
}
II. public FrozenYogurt() {
super();
System. out. println("I'm the new ice cream");
super();
}
III. public FrozenYogurt() {
super();
System. out. println("I'm the new ice cream");
}
a. I only
b. II only
c. III only
d. I and II
e. I, II and III
The constant in the Integer wrapper class that represents the smallest int value is .
A. MIN
B. MIN_VALUE
C. SMALL_INT
D. SIZE
E. Integer. MAX