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COSC 101 - Final Exam Study (Fall 2024) Questions and Answers
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COSC 101 - Final Exam Study (Fall 2024) Questions and Answers
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COSC 101 - Final Exam Study (Fall 2024)Questions and Answers
Which of the following data types can store real numbers? (select all that apply).
[] char
[] double
[] String
[] int
[] Float
[] Integer - Answer -[] char
∎ double
[] String
[] int
∎ Float
[] Integer
If I have a Scanner declared as myScanner, myScanner.next() will read an entire line of
input and save it as a string.
[] True
[] False - Answer -[] True
∎ False
public static void main(String[] args) {
int val = 100;
System.out.print(val++);
}
What is printed to the screen given the code above? - Answer -100
What is output from the following code?
String s = "Georgia Tech";
String s1 = s.substring(0,7);
String s2 = s1.substring(2);
String s3 = s2.substring(0,3);
System.out.println(s3);
[] eorg
[] orgi
[] eor
[] org
[] You will get an index out of bounds exception - Answer -[] eorg
,[] orgi
[] eor
∎ org
[] You will get an index out of bounds exception
public static void main(String[] args) {
double data = 1.25512;
String out = String.format("%.2f", data);
System.out.print(out);
}
What is printed to the screen in the code above? - Answer -1.26
Which of the following would equal 2?
I.
int x = 0;
x ++;
x += x;
II.
int y = 4;
y ++;
y /= 2;
III.
int z = 4;
z += 2;
z /= 2;
[] I only
[] II only
[] III only
[] I, II, and III
[] I and II only - Answer -[] I only
[] II only
[] III only
[] I, II, and III
∎ I and II only
What will be printed after the following code executes?
double d;
{
d = 24;
int e = 6;
}
System.out.print(d + e + " " + d/6);
,[] 24.0 6 4.0
[] 30.0 4.0
[] 24 6 4.0
[] 24 6 4
[] The code will not execute because of a compilation error - Answer -[] 24.0 6 4.0
[] 30.0 4.0
[] 24 6 4.0
[] 24 6 4
∎ The code will not execute because of a compilation error
A field with the ________ keyword means that the field cannot be changed after being
set once. - Answer -final
Given the following java code, give the full name of the file including the extension (an
extension for a Microsoft Word file is .docx, a PDF file is.pdf, etc).
public class addition {
public static void main(String[] args) {
int x = 5;
int y = 6;
int sum;
sum = x + y;
System.out.println(sum);
}
}
Full name of file: - Answer -addition.java
There is a method called checkString that determines whether a string is the same
forwards and backwards. The following data set inputs can be used for testing the
method. What advantage does Data Set 2 have over Data Set 1?
Data Set 1 Data Set 2
aba bcb
abba bcd
aBa
[] Data Set 2 contains fewer values than Data Set 1
[] Data Set 2 contains one string which should return true and one that should return
false.
[] All strings in Data Set 2 have the same number of characters.
[] The strings in Data Set 2 are all lowercase
[] There are no advantages - Answer -[] Data Set 2 contains fewer values than Data Set
1
, ∎ Data Set 2 contains one string which should return true and one that should return
false.
[] All strings in Data Set 2 have the same number of characters.
[] The strings in Data Set 2 are all lowercase
[] There are no advantages
Consider the following Cat class, with the cat's age stored in the age attribute. The
getAge method is intended to allow methods in other classes to access a Cat object's
age value; however, it does not work as intended. Which of the following best explains
why the getAge method does NOT work as intended?
public class Cat
{
private int age;
public Cat(int a)
{
age = a;
}
public int getAge()
{
return a;
}
}
[] The return type of the getAge method should be void.
[] The getAge method should be declared private.
[] The variable age is not declared inside the getAge method.
[] The instance variable age should be returned instead of a, as a is local to the
constructor.
[] The getAge method should have at least one parameter. - Answer -[] The return type
of the getAge method should be void.
[] The getAge method should be declared private.
[] The variable age is not declared inside the getAge method.
∎ The instance variable age should be returned instead of a, as a is local to the
constructor.
[] The getAge method should have at least one parameter.
A student has created a Cat class. The class contains variables to represent the
following.
- A String variable called color to represent the color of the cat
- A String variable called breed to represent the breed of the cat
- An int variable called age to represent the age of the cat
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