Signature _____________________
CSE 11
Name ________________________
Quiz 1
cs11f ____
Fall 2011
Student ID ____________________
This quiz is to be taken by yourself with closed books, closed notes, no electronic devices.
(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. Using the operator precedence table above, evaluate each expression and state what gets printed. Remember
short-circuit evaluation with
&&
and
||
.
int a = 7;
int b = -1;
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 = exp1 || exp2 && exp3;
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 ); ____________________
2. Consider the following code segment:
x = y;
y = !x;
x = !y;
Assume x and y are initialized boolean variables. Which of the following statements is true?
Circle the letter in front of the true statement.
A. The final value of x is the same as the initial value of x.
B. The final value of x is the same as the initial value of y.
C. The final value of y is the same as the initial value of y.
D. The final value of y is the same as the initial value of x.
E. It is not possible to say anything about the final values of x and y without knowing their initial values.
(Continued on other side)
