Objects & Methods
This operator is used to access methods and instance variables of an object.
What is the dot operator (or dot notation)
This String method returns the number of characters in a String.
What is length()?
This relational operator checks if two values are equal in a boolean expression.
What is == (double equals)?
This type of loop is best when you know exactly how many times you need to iterate.
What is a for loop?
The expression 6 + 3 / 2 * 2 evaluates to this value using proper order of operations.
What is 8? (6 + 1 * 2 = 6 + 2 = 8)
This type of method does not return a value and uses the keyword "void."
What is a void method?
For String s = "computer", s.substring(2, 5) returns this value.For String s = "computer", s.substring(2, 5) returns this value.
What is "put"?
To compare if two String objects have the same content, you should use this method instead of ==.
What is .equals()?
The for loop header for(int i = 0; i < 10; i += 2) will execute this many times.
What is 5 times? (i = 0, 2, 4, 6, 8)
After executing: int a = 5; a += 3; a *= 2; the final value of a is this.
After executing: int a = 5; a += 3; a *= 2; the final value of a is this.
This special method has the same name as the class and is used to create and initialize objects.
What is a constructor?
Math.random() returns a double value in this range.
What is 0.0 (inclusive) to 1.0 (exclusive)?
In short-circuit evaluation with the && operator, if the first condition is this value, the second condition is never evaluated.
What is false?
In a while loop, forgetting to update this variable inside the loop body can cause an infinite loop.
What is the loop control variable?
Given double a = (int)(6.5 - 3.5); and double b = (int)6.5 - 3.5;, the value of a - b is this.
What is 0.5? (a = 3.0, b = 2.5, so 3.0 - 2.5 = 0.5)
This special method has the same name as the class and is used to create and initialize objects.
What are arguments?
Given String word = "September", word.substring(0, 3) + word.substring(word.length() - 3) produces this output.
What is "Sepber"?
The expression !(x < 3) && !(x != 4 || x > 10) is equivalent to this simplified expression.
What is (x >= 3) && (x == 4 && x <= 10)?
The code segment that prints n % 4 for n starting at 10, incrementing by 5 each time while n <= 35, produces this output.
What is "2 3 0 1 2 3"?What is "2 3 0 1 2 3"?
In the scramble method, the call scramble("computer", 3) returns this String value.
What is "utercom"? (substring(4,8) + substring(0,3) = "uter" + "com")
Given a TestScore class with a bonus(int b) method that adds to the score, calling unit1.bonus(5) followed by unit1.getScore() when the original score was 80.0 returns this value.
What is 85.0?
The code (int)(Math.random() * 5) + 9 produces random integers in this interval.
What is 9 to 13 (inclusive)?
The boolean expression x || !y || !(x && y) will always evaluate to this value, regardless of the values of x and y.
What is true (always true)?
The nested loop with outer loop executing from x = 1 to 3 and inner loop executing from y = 3 to 0 (decrementing), calculating sum += x + y each iteration, produces this final sum value.
What is 42?
What is "utercom"? (substring(4,8) + substring(0,3) = "uter" + "com")
What is 19? (final values: num=0, val=5, ans=14)