Java I - Midterm

java

You use ________ to run a Java program.

TRUE

[TRUE/FALSE] $343 is a valid identifier

FALSE

[TRUE/FALSE] Java source code can be executed on a Java Virtual Machine

Java API

________ contains predefined classes and interfaces for developing Java programs

Java virtual machine

________ is a software that interprets Java bytecode

x.eqauls('a')

char class method for testing a matched character assume variable is named x and test for 'a'

-2

"AbA".compareToIgnoreCase("abC") returns

return new int[]{1, 2, 3};

"Suppose a method p has the following heading:

2

"abc".compareTo("aba") returns ___________.

A1

Note that the Unicode for character A is 65. The expression "A" + 1 evaluates to ________.

megahertz and gigahertz

The speed of the CPU may be measured in?

1234.6

The statement System.out.printf("%3.1f", 1234.56) outputs ___________.

double

The switch control variable cannot be what type of variable

Multiprogramming

runs multiple programs sharing CPU.

two bytes

A Java character is stored in __________.

Java interpreter

A ________ is a program that translates Java source code into Java bytecode.

[1, 20, 30, 40, 50]

Assume int[] scores = {1, 20, 30, 40, 50}, what is the output of System.out.println(java.util.Arrays.toString(scores))?

applets

Due to security reasons, Java ________ cannot run from a Web browser in the new version of Java

Boolean literal

In Java, the word true is

char[] charArray = new char[]{'a', 'b'}; and char[] charArray = {'a', 'b'};

How can you initialize an array of two characters to 'a' and 'b'?

5

How many elements are in array double[] list = new double[5]?

Java bytecode

Java compiler translates Java source code into

Java bytecode

Java compiler translates Java source code into ________.

overflows

Java does not report errorss on ____

-1

Math.cos(Math.PI) returns

javac Test.java

The JDK command to compile a class in the file Test.java is

class loader

The ________ loads Java bytecode to the memory

Double.parseDouble(s);

The __________ method parses a string s to a double value.

.class

The extension name of a Java bytecode file is ________

public static void main(String[] args)

The main method header is written as

Math.sin(Math.toRadians(35))

To obtain the sine of 35 degrees, use _______.

4.0

What is Math.rint(3.5)?

java ByteCode

Which JDK command is correct to run a Java application in ByteCode.class?

software

is a program written in a high-level programming language.

Multiprocessing

runs multiple programs concurrently using multiple processors

javac MyFirstProgram.java

type in the JDK command to compile the class MyFirstProgram