Computer Science and Engineering 2221 Final Exam Review with Correct Answers (2024) Practice Questions with Solutions

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OSU CSE 2221 FINAL EXAM REVIEW WITH CORRECT
ANSWERS

How many times will the body of the loop execute?


*a.* 0
*b.* 1
*c.* 2
*d.* 3
*e.* the loop will never terminate - answer-a


The correct syntax for the "main" method signature is:


*a.* private static void main(String[] args)
*b.* public static String main(String[] args)
*c.* public static void main(String[] args)
*d.* public void main(String[] args)
*e.* none of the above - answer-c


The Java compiler does the following:

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*a.* checks a bytecode program in a ".class" file for run-time
errors and if there are none, it generates source code for that
program in a ".java" file
*b.* checks a source code program in a ".java" file for run-time
errors and if there are none, it generates bytecode for that
program in a ".class" file
*c.* checks a source code program in a ".java" file for compile-
time errors and, if there are none, it generates bytecode for that
program in a ".class" file
*d.* checks a bytecode program in a ".class" file for compile-time
errors and if there are none, it generates source code for that
program in a ".java" file
*e.* none of the above - answer-c


Which statement correctly defines a java constant?


*a.* const SPECIAL = 1234;
*b.* int SPECIAL = 1234;
*c.* int final SPECIAL = 1234;
*d.* final int SPECIAL = 1234;
*e.* const int SPECIAL = 1234; - answer-d


What is the value of s after the following statement:

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String s = (!true) + " : " + (10 + 4) + " is 104";


*a.* "!true : 104 is 104"
*b.* "false : 104 is 104"
*c.* "!true : 14 is 104"
*d.* "false : 14 is 104"
*e.* This is a compile-time error - answer-d


The Checkstyle plugin for Eclipse is useful because:


*a.* it warns you of potential compile-time errors
*b.* it helps you make your code understandable for yourself and
other programmers
*c.* it prevents your code from making errors caught by assert
statements
*d.* it tells you when code you have written does not obey its
contract
*e.* none of the above - answer-b


If x is an int variable, when does the boolean expression evaluate
to true?


((x % 5 != 0) && (x % 2 != 0))

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*a.* when x is divisible by 5 or by 2 but not by both
*b.* when x is divisible by 10
*c.* when x is not divisible by 10
*d.* when x is neither divisible by 5 nor by 2
*e.* when x is either divisible by 5 or by 2 - answer-d


The nextDouble( ) method of r, a variable of type Random,
returns a double in a range of [0,1). Which of these expressions
would you use to create a random number in the range of [-3,3)?


*a.* r.nextDouble( ) * 3.0 - 3.0
*b.* (r.nextDouble( ) - 0.5) * 6.0
*c.* r.nextDouble( ) * 6.0 + 3.0
*d.* r.nextDouble( ) * 6.0 + 0.5
*e.* (r.nextDouble( ) - 3.0) * 6.0 - answer-b


Consider the following code fragment:


int x = 8;
while ((x / 3) != 2) { x = x - 1; }