CTP 150 quiz 2

what are two method to determine if str1 is less than str2?

(str1.compareTo(str2) < 0)

double x = 45678.259 System.out.println("%.2f", x); what will be printed?

45,678.26

a boolean expression is one that is either

true or false

t/f: when testing for character values, the switch statement does not test for the case of the character

false

t/f: when two strings are compared using the compareTo method, the cases of the two strings are not considered

false

this is a boolean variable that signals when some condition exists in the program

flag

if chr is a character variable, which of the following if statements is correct

if (chr == 'a')

write a conditional expression to test wheter the variable grade contains an A B or C

if (grade == 'A' || grade == 'B' || grade == 'C")

int ans = 10; int x = 65; int y = 55; if (x >=y) int ans = x +y; what is value of ans?

no value, syntax error due to ans being redefined

t/f: a local variables scope always ends at the closing brace of the block of code in which it is declared

true

t/f: the if/else statement will execute one group of statements if its boolean expression is true or another group if its boolean expression is false

true

int bonus, sales = 1250; if (sales > 1000) bonus = 100; if (sales > 750) bonus = 50 if (sales > 500) bonus = 25; else bonus = 0; what is value of bonus?

25, each selection statement is executed since they are independent of the others

z = (a < 10)? 0: 7; rewrite the following using an if statement

if (a < 10) z = 0; else z = 7;

int y = 10; if (y == 10) { int x = 30; x += y; } System.out.print("x = " + x); what will be printed?

will not compile, x is unknown in the print statement due print statement being outside the if statement