Intro to Computers, Programs, and Java

Question 1

Intro to Computers, Programs, and Java

Why is Java platform independent?

Answer 1

The JVM can be installed on most platforms, and Java source code will be translated by the specific JVM to the platforms machine language

Question 2

Intro to Computers, Programs, and Java

What is important for the Java source file names, in relation to class names?

Answer 2

The source file name must match the public class name in the program

Question 3

Intro to Computers, Programs, and Java

What extension name does Java source files have?

Answer 3

.java

Question 4

Intro to Computers, Programs, and Java

When does a file name end with .class?

Answer 4

When classes are compiled into byte code, the new file has the .class extension

Question 5

Intro to Computers, Programs, and Java

What two types of import are there?

Answer 5

Specific import and wildcard import. Specific imports single classes, while wildcard imports all classes in a package

Question 6

Intro to Computers, Programs, and Java

What are the three categories of errors?

Answer 6

Syntax errors, runtime errors, and logic errors

Question 7

Intro to Computers, Programs, and Java

__ is the brain of the computer.

Answer 7

The CPU

Question 8

Intro to Computers, Programs, and Java

The speed of the CPU is measured in __

Answer 8

Hertz. Megahertz, or more commonly today, gigahertz

Question 9

Intro to Computers, Programs, and Java

Why does the computer use zeros and ones?

Answer 9

Because digital devices have two stable states and it is natural to use one state for 0 and the other for 1

Question 10

Intro to Computers, Programs, and Java

One byte has __ bits

Answer 10

8

Question 11

Intro to Computers, Programs, and Java

The computer can only execute code in ___ language

Answer 11

Machine language

Question 12

Intro to Computers, Programs, and Java

___ translate high-level code into machine code

Answer 12

Compilers

Question 13

Intro to Computers, Programs, and Java

Java was developed by ___

Answer 13

Sun Microsystems

Question 14

Intro to Computers, Programs, and Java

Java ___ can run from a web browser

Answer 14

Java applets

Question 15

Intro to Computers, Programs, and Java

Which of these are object-oriented programming languages?

Java, C++, C, C#, Pascal

Answer 15

Java, C++ and C#

Question 16

Intro to Computers, Programs, and Java

What is the ‘Java language specification’?

Answer 16

It is a technical definition of the language that includes the syntax and semantics of the Java programming language

Question 17

Intro to Computers, Programs, and Java

What is the ‘Java API’?

Answer 17

The Java API (application programming interface) contains predefined classes and interfaces for developing Java programs

Question 18

Intro to Computers, Programs, and Java

What is the ‘Java JDK’?

Answer 18

The Java JDK (Java development kit) consists of a set of separate programs for developing and testing Java programs, each of which is invoked from a command line

Question 19

Intro to Computers, Programs, and Java

What is a ‘Java IDE’?

Answer 19

A Java IDE provides an integrated development environment (IDE) for rapidly developing Java programs. Editing, compiling, building, debugging, and online help are integrated in one graphical user interface