ANSWERS v1.1
C Sc 227 Practice Test, Spring 04 Section Leader __________ Your Name: ______________________
1. Evaluate each of the following expressions and write the final value for each such that each value clearly
indicates the type of value. Always use the initial values of the variables as shown (12pts)
int j = 5;
int k = 3;
double x = -1.5;
double y = 2.3;
String s = "Al Gore";
Remember to use ' ' for char, " " for string, a decimal point for double, true or false
a) ____2___ j / k
b) ____'r'___ s.charAt(5)
c) __2.0___ Math.sqrt(y + 1.7)
d) __2___ Math.round(y)
e) __false _ x + 5.1 > y + 2.0
f) __false_ (k > j) && (k < 3)
g) ___2_____ j % k
h) ____2____ j + k / 4
i) false_ s.equals("AL GORE") // Missing "
j) _"AL GORE"_ s.toUpperCase()
k) __false__ true && false
l) ___-1___ s.indexOf("go");
2. Write PASS or FAIL to the left of any assertion to indicate if the assertion would pass of fail if part of a
JUnit test. (8pts)
a. __ FAIL ___ assertEquals("bc", "abcde".substring(1, 2)); // returns "b"
b. __ PASS ___ assertEquals(4.0, Math.sqrt(16.0), 1e-12);
c. __ PASS ___ assertTrue(1 % 2 == 1);
d. __ PASS ___ assertEquals(2, Math.round(1.754));
e. __ FAIL ___ assertEquals(1.7, Math.round(1.789 * 10) / 10.0, 1e-12);
f. __ FAIL ___ assertEquals(4, "abcde".length());
// The long expression actually returns true
g. __ FAIL ___ assertFalse(5 % 2 == 101 % 2 && 2.0 == Math.round(1.5));
h. __ FAIL ___ assertEquals('a', "abcde".charAt(1)); // returns 'b', not 'a'
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