## Java week4

##### Created by:

Thunderrod  on March 4, 2011

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# Java week4

 The expression (int)6.9 + (int)7.9 evaluates to ____.13
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#### Definitions

The expression (int)6.9 + (int)7.9 evaluates to ____. 13
Suppose that alpha is a double variable. What is the value of alpha after the following statement executes: alpha = 11.5 + (double)(15) / 2;. 19.0
String y = String.format("%15s", "Jumpin' Java"); " Jumpin' Java"
String sentence;
String str1, str2, str3;
int length1, length2;

sentence = "Today is Wednesday.";

str1 = sentence.substring(9, 18);
str2 = str1.substring(0, 3);
str3 = sentence.replace('d', '*');

length1 = sentence.length();
length2 = str1.length();

Based on the code above, what is the value of str3?
Toay is Wenes*ay.
Assume that the following variables have been declared:

String str1 = "Q.E.D.";
String str3 = "Sirius Cybernetics Corporation";

Evaluate the following expression. Make sure that your answer is the correct type:

2 is an int
2.0 is a double
"X" is a String
'X' is a char

str3.substring(9, str3.indexOf("e"))
"b"
Evaluate the following expression. Make sure that your answer is the correct type:

2 is an int
2.0 is a double

Math.abs(2 + -4)
2
Assume that the following variables have been declared:

String str1 = "Q.E.D.";
String str3 = "Sirius Cybernetics Corporation";

Evaluate the following expression. Make sure that your answer is the correct type:

2 is an int
2.0 is a double
"X" is a String
'X' is a char

str1.toLowerCase()
"q.e.d."
Evaluate the following expression. Make sure that your answer is the correct type:

2 is an int
2.0 is a double

Math.sqrt(16) * Math.max(Math.abs(-5), Math.abs(-3))
20.0
If you want to execute one piece of code when the variable x is greater than 100, and another piece of code otherwise, you should use : an if statement with an else part
What is the output of the following Java code?

int x = 6;
if (x > 10)
println("One ");
println("Two ");
Two
What is the output of the following code fragment?

int x = 10;
if (x > 15)
x = 0;
println(x);
else
println(x + 5);
Syntax error (does not compile)
In a ____ control structure, the computer executes particular statements depending on some condition(s). selection
What does <= mean? less than or equal to
If s is a String object, which of these relational expressions is illegal (that is, your code will not compile if you use it) : s > "Hi"
What is the output of the following Java code?

int x = 0;
if (x < 0)
println("One ");
println("Two ");
println("Three");
Two Three

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