CSE 205 COMPREHENSIVE STUDY GUIDE FULL QUESTIONS WITH ACCURATE SOLUTIONS

CSE 205 COMPREHENSIVE STUDY GUIDE
FULL QUESTIONS WITH ACCURATE
SOLUTIONS

●● The relationship between a class and an object is best described as


a) objects are instances of classes
b) classes are instances of objects
c) classes are programs while objects are variables
d) objects and classes are the same thing
e) objects are the instance data of classes
Answer: a) objects are instances of classes


●● To define a class that will represent a car, which of the following
definitions is most appropriate?


a) public class CAR
b) public class car
c) private class car
d) private class Car
e) public class Car
Answer: e) public class Car

,●● Which of the following reserved words in Java is used to create an
instance of a class?


a) new
b) public
c) public or private, either could be used
d) class
e) import
Answer: a) new


●● What does acronym API stands for?
a) Application Parameter Internet
b) Application Programming Interface
c) Apply Programming Interactive
d) Abstraction Programming Interface
Answer: b) Application Programming Interface


●● A class' constructor usually defines


a) how an object is initialized
b) how an object is interfaced

,c) if the instance data are accessible outside of the object directly
d) the number of methods in the class
e) the number of instance data in the class
Answer: a) how an object is initialized


●● Java methods can return only primitive types (int, double, float, char,
boolean, etc).


True
False
Answer: False


●● All Java classes must contain a main method which is the first
method executed when the Java class is called upon.


True
False
Answer: False


●● use the following class definition
import java.text.DecimalFormat;
public class Student
{ private String name;

, private String major;
private double gpa;
private int hours;
public Student(String newName, String newMajor, double newGPA, int
newHours)
{ name = newName;
major = newMajor;
gpa = newGPA;
hours = newHours;
}
public String toString( )
{ DecimalFormat df = new DecimalFormat("0.000");
return name + "\n" + major + "\n" + df.format(gpa) + "\n" + hours
}
}
Which of the following could be used to instantiate a new Student s1?


a) new Student(s1);
b) new Student s1 = ("Jane Doe", "Computer Science", 3.333, 33);
c) Student s1 = new Student("Jane Doe", "Computer Science", 3.333,
33);
d) Student s1 = new Student( );
e) s1 = new Student( );