COP 2210 Sample Exam Questions
COP 2210 Sample Exam Questions Kraynek
5 pts
1. What is the difference between a class and a class object?
5 pts
2. What is the difference between an class object and an class variable?
5 pts
3. Suppose that s1 and s2 are String variables. Explain the difference between the comparison s1.equals(s2) and the comparison s1 == s2.
5 pts
4. What is the difference between a primitive type variable and a class variable?
10 pts
5. Consider the following statements:
String s1 = new String(“abcdef”);
String s2 = new String(“123abc”);
What are the values of the following expressions?
a. s1.substring(3)
b. s1.substring(1,4)
c. s1.charAt(0) == s2.charAt(3)
d. s1.substring(0,3).equals(s2.substring(4))
e. s1 + s2
10 pts
6. Suppose we have the declarations:
int x = 37;
String s = “abcdefb”;
What are the values of the following expressions?
a. 29 % 5
b. 29 / 5
c. 5 * (x / 5) +( x % 5)
d. s.indexOf(“b”)
e. s == new String(“abcdefb”)
5 pts
7. What is the output of the following segment?
int n = 35;
while( true ) {
if( n ................
................
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