CSE 2221 Final Exam Review Questions and Answers | 2025/2026 Edition | Comprehensive Study Guide and Exam Preparation Material

CSE 2221 Final Exam Review Ques ons and answers
Newest RATED A+ 2025/2026

For a method formal parameter p, which parameter mode guarantees that #p cannot appear n
the ensures clause for the method's contract?

a. clears

b. replaces

c. restores

d. updates - CORRECT ANSWERS B. replaces



You may reason about the behavior of Java code involving immutable types exactly as if they
were primi+ve types because:

a. "Immutable" and "primi+ve" are synonyms; there is no difference between them

b. Computa+ons involving immutable types are just as efficient as those involving primi+ve
types

c. Aliasing, which can happen with immutable types but not primi+ve types, cannot cause
trouble because object values for immutable types cannot be changed

d. In any code where an immutable type is used in a way where it would not behave like a
primi+ve type, it causes a Java compile-+me error - CORRECT ANSWERS C. Aliasing



Assume n is an int variable. Which Java expression is true exactly when n is an odd number (not
divisible by 2) and should be used to check for this situa+on?

a. n%2==0

b. n%2!=0

c. n%2==1

d. n%2!=1 - CORRECT ANSWERS b. n%2!=0

, what are the values of str and num a<er the call to foo?

private sta+c void foo(String s, NaturalNumber n){

s="Columbus, " +s;

n=new NaturalNumber2(43210);

}

...String str = "Ohio";

NaturalNumber num=new NaturalNumber2(314);

foo(str,num);

a. str="Ohio", num=314

b. str="Columbus, Ohio", num=314

c. str="Ohio", num=43210

d. str="Columbus, Ohio", num=43210 - CORRECT ANSWERS c. str="Ohio", num=314



What are the values of array and index a<er the call to bar?

private sta+c void bar(int[] a, int i){

a[i]++;

i++;

}

...

int[] array={1,2,3,4};

int index=1;

bar(array,index);



a. array={1,2,3), index=1

b. array={1,2,3), index=2

c. array={1,3,3), index=1