Exam (elaborations)
CSE 2221 final review
- Module
- CSE 2221 - Midterm 1 - Set 1
- Institution
- CSE 2221 - Midterm 1 - Set 1
CSE 2221 final review
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CSE 2221 final reviewsyntax for main method is - ANS-public static void main(String[] args)
Java byte code is saved in a - ANS-The Java compiler checks the source code of
a program in a .java file; if and only if there are
no compile-time errors, it generates bytecode
for that program and saves it in a .class file
define a constant int of 3 in java - ANS-final int THREE = 3;
print 505 in a console adding 500 and 5 - ANS-out.println(500+5);
Root node of an RSS 2.0 feed - ANS-The root node is an rss node with a version
attribute whose value is "2.0"
T/F Is there a channel node as a child of the root? - ANS-True
What is required in the child nodes of the channel node? - ANS-title,link,description
item node in RSS 2.0 must have what children? - ANS-a title or description node
why is n % 2 == 1 not an appropriate way to determine if an int is false? what is an
appropriate way? - ANS-because odd numbers.... n % 2 != 0
What common objects are immutable in java? What does this mean and include an
example. - ANS-String and Integer....
public void exampleInt(int y){
y = 2;
}
public static void main(String [] args){
int x = 5;
// x has value 5 at this point
example(x);
// x still has the value 5 after the call i.e. isn't 2
}
, whereas
public void exampleNN(NaturalNumber y){
y.add(new NaturalNumber1L(2));
}
public static void main(String [] args){
NaturalNumber x = new NaturalNumber1L(2);
// x has value 2 at this point
example(x);
// x now has a value of 4
}
List the parameter modes - ANS-1. Restores
2.Clears
3.Updates
4.Replaces
Default parameter mode? - ANS-Restores
Define restore parameter mode. - ANS-Keeps value what it was inputed
Define update parameter mode. - ANS-depends on incoming value
Define replace parameter mode. - ANS-but the method's behavior does not
depend on its incoming value
Define clears parameter mode. - ANS-initial value of the object (NaturalNumber is 0)
What modes indicate that the parameter can change
value due to the method. - ANS-replaces and updates
if n is null and n.copyFrom(new NaturalNumber1L(2)) is called what will the value of n
be? - ANS-Error! can not copy to a null point
interval halving technique - ANS-!!!!!!!!!
Theorem for recursion - ANS-
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