MidTerm1F08-sol - 1/7 EE 322C Fall 2008 First Mid-Term Dr...

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Unformatted text preview: 1/7 EE 322C Fall 2008 First Mid-Term Dr. Ramesh Yerraballi Full Name : Quiz Duration : 75 minutes 1. [ 20 points ] Answer the following i. [ 4 points ] In the method below, which statement about the possible output is correct? public static void what( ) { int x = 5; f( x ); // Some function whose code does not matter System.out.println( x ); } a. 0 is a possible output b. 5 is the only possible output c. Any integer can be output d. None of the above are true ii. [ 12 points ] What is the value of a, b and c after each of the following lines: [Note: The answers on one line affect the values on the next] int a = 5, b = 8, c = 0; a = b++ + c++; //Answer: a: 8 b:__ 9 __ c:_ 1 __ a = b++ + ++c; //Answer: a:_ 11 __ b:_ 10 __ c:__ 2_ a = ++b + c++; //Answer: a:_ 13 __ b:_ 11 _ c:__ 3 _ a = ++b + ++c; //Answer: a:_ 16 _ b:__ 12 _ c:__ 4 _ iii. [ 4 points ] What does the method below do? [Hint: Eliminate the wrong answers] public static int foo(String Strs) { int t = 0; for( int i=0; i < Strs.length; i++ ) t += Strs[i].length(); return t; } a. Returns the sum of the lengths of all the strings in the array of Strings passed as a parameter b. Returns the concatenation of all the strings in the array of Strings passed as a parameter c. Returns the concatenation of all the string in the array of Strings passed as a parameter, in reversed order (last string first) d. Generates a compiler error because Strs.length does not make sense 2/7 2. [ 20 points ] Given the following class X and a class useX that uses the class X : public class X { static int sta = 0; private int pri; public int pub; public X(int pr, int pu) { pri = pr; pub = pu; sta++; } public void sw() { int tmp = pub; pub = pri; pri = tmp; } public void setpr(int i) { pri = i; } public String toString() { return pub + “u:r” + pri; } } public class useX { public static void main (String args) { // The code in questions below // is assumed to be placed here } Answer the following questions independent of each other i. [ 5 points ] What is the output of the following lines of code when placed inside...
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This note was uploaded on 09/26/2009 for the course EE 322C taught by Professor Nettles during the Spring '08 term at University of Texas.

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MidTerm1F08-sol - 1/7 EE 322C Fall 2008 First Mid-Term Dr...

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