Exam 3: Introduction to Objects and Inputoutput

Based on the code above, what is the value of length1?

Suppose z = 1834.762. The output of the statement System.out.printf("%.1f", z); is 1834.800.

String variables are reference variables.

What is the output of the following statement? System.out.printf("%.2f", 48.9);

Suppose that you have the declaration: int num = 94; double x = 73.92; String str = "Programming"; What is the output of the following statements? System.out.println("123456789012345678901234567890"); System.out.printf("%5d%6.2f %15s%n", num, x, str);

The method printf is used only to format the output of integers and decimal numbers.

The classes Integer, Float, and Double are called wrapper classes.

In a format specifier, the option width specifies the maximum number of characters to be written to the output.

The value of the expression Integer.parseInt("+782") is "782".

In the class String, the substring method inserts a string into another string.

Which statement instructs a program to run the garbage collector?

Which of the following statements would store input in name?

Which of the following outputs 56734.9875 to three decimal places?

What is the value of the following statement? Math.pow(3,4)

In order to use a predefined method, you only need to know the name of the method and the type of each parameter.

In a string, the index (position) of the first character is 1.

An expression such as str.length(); is an example of a(n) ____.

In Java, all variables declared using a class are ____.

The dot (.) operator is also called the member specific operator.

Based on the code above, what is the value of str3?