Signature _____________________ CSE 11 Name ________________________
Quiz 1
cs11f ____ Fall 2010 Student ID ____________________
This quiz is to be taken by yourself with closed books, closed notes, no calculators.
(Partial) Operator Precedence Table
Operators Associativity
! ++ -- (pre & post inc/dec) right to left
* / % left to right
+ - left to right
< <= > >= left to right
== != left to right
&& left to right
|| left to right
= right to left
1. Which of the following are valid Java identifiers? (Circle your answer(s).)
this&that _thisRthat This_2_That boolean
_9_2_5 n!ne_2_5 9_2_5 bool
2. Using the operator precedence table above, evaluate each expression and state what gets printed. Remember
short-circuit evaluation with && and ||.
int a = 5;
int b = -2;
int c = 2;
boolean exp1 = a + b * c <= a + c * b; _________ (value of exp1)
boolean exp2 = !(c + a > b); _________ (value of exp2)
boolean exp3 = b - a >= c; _________ (value of exp3)
boolean z = exp1 && exp2 || exp3;
System.out.print( "z = " + z ); ____________________
z = exp3 || exp1 && !exp2;
System.out.print( "z = " + z ); ____________________
b = --b + ++a % 4 * c++ * 2;
System.out.print( "a = " + a ); ____________________
System.out.print( "b = " + b ); ____________________
System.out.print( "c = " + c ); ____________________
3. Where is the coordinate (0,0) in a graphics window? (Circle correct letter.)
A. at the center of the window
B. at the upper right corner of the window
C. at the upper left corner of the window
D. at the bottom right corner of the window
E. at the bottom left corner of the window (Continued on other side)
