CISC 124 Final Exam Questions & Answers 2024/2025
primitive type - ANSWERSA variable data type in which the variable's value is of the appropriate size and format for its type: a number, a character, or a boolean value.
Char
byte
short
int
long
float
double
boolean
Variable decele...
primitive type - ANSWERSA variable data type in which the variable's value is of the appropriate size and
format for its type: a number, a character, or a boolean value.
Char
byte
short
int
long
float
double
boolean
Variable decelerations - ANSWERSint number = 6
expressions - ANSWERSpieces of code that produce a value
conditions - ANSWERStrue or fales
loops - ANSWERSrunning the same sequence multiple times
Type Casting - ANSWERSConverting data from one type to another, e.g., from string to int, potentially
losing information.
system.out.printf() - ANSWERSYou an use this method to display formatted output in a console window.
Scanner class - ANSWERSProvides convenient methods for reading input values of various types.
,single arrays - ANSWERSjava array is an object which contains elements of a similar data type. It is a data
structure where we store similar elements. We can store only a fixed set of elements in a Java array.
Array in java is index-based, the first element of the array is stored at the 0 index.
multi-dimensional arrays - ANSWERSint[][] a = new int[3][4];
The ArrayList<T> class - ANSWERSThe ArrayList<T> class resides in the java.util
package. Stores and returns Objects of type T
Aliasing objects - ANSWERSRemember that when you make an assignment to an object variable, you are
assigning a reference to an object. It is possible to have multiple variables that refer to the same object
StringTokenizers - ANSWERSin the java.util package
this class provides an easy way of parsing strings up into pieces called tokens
tokens are separated by diemiters that you can specify
Wrapper classes - ANSWERSA Wrapper class is a class whose object wraps or contains a primitive data
types. When we create an object to a wrapper class, it contains a field and in this field, we can store a
primitive data types. In other words, we can wrap a primitive value into a wrapper class object.
Enumerated types - ANSWERSkeyword enum
contents are not strings but instead objects
Should be used in UPPER CASE
equals()
• toString()
• compareTo()
• ordinal()
• values()
, Importing packages - ANSWERSpackage is a java keyword
groups classes together into a package
package package_name;
• This line is at the top of a class definition, before
the public class...
import folder.packagename.*;
• The ".*" says to import all classes in the package,
or you can import specific classes.
Packages and use of static import - ANSWERSUsed to import all static methods in a class, so
that they can be used as if they were declared
within the class that uses them.
• For example:
import static org.junit.jupiter.api.Assertions.*;
• Another example:
import static java.lang.Math.*;
Use of modules in Java - ANSWERSA Java Module is a mechanism to package up your Java application
and Java packages into Java modules. A Java module can specify which of the Java packages it contains
that should be visible to other Java modules using this module. ... Java modules is a new feature in Java 9
via the Java Platform Module System (JPMS)
Methods - use and declaration. - ANSWERSThree aspects to consider:
1. Naming the method.
2. Providing arguments(s) or not.
3. Doing something with the return value or not
Passing parameters by value and by reference - ANSWERSJava does manipulate objects by reference, and
all object variables are references. However, Java doesn't pass method arguments by reference; it passes
them by value. The method successfully alters the value of pnt1 , even though it is passed by value;
however, a swap of pnt1 and pnt2 fails
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