Signature _____________________ CSE 11 Name ________________________
Quiz 1
cs11f ____ Fall 2009 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 not valid Java identifiers? (Circle your answer(s).)
this&that thisRthat This2That integer
This-That this_R_that 2_This_That this1+that1
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 || exp2 && exp1;
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) In general, you should define instance variables to be (Circle the letter of the correct answer):
A. public
B. private
C. primitive data types
D. reference data types (Continued on other side)
