Chapter 1

Question 1

What is the code written by a programmer?

Answer 1

Source code

Source code is the human-readable instructions that a programmer writes.

Question 2

What does a compiler do?

Answer 2

Translates source code into executable code

A compiler converts high-level programming language into machine code.

Question 3

What file extension is used for Java source code?

Answer 3

.java

The .java extension indicates a file contains Java source code.

Question 4

What file extension does the Java compiler create?

Answer 4

.class

The .class files contain the bytecode that the Java Virtual Machine (JVM) can execute.

Question 5

Which files does the JVM read?

Answer 5

.class

The JVM executes the bytecode contained in .class files.

Question 6

What command is used to run the Java compiler from the command line?

Answer 6

javac

The command ‘javac’ compiles Java source files into bytecode.

Question 7

command to run Java PROGRAM from command line:

Answer 7

java

Question 8

receiving a divide by zero error when the program is executed is an example of:

Answer 8

a runtime error

Question 9

true or false: machine language can be used to write programs that can run on ANY machine.

Answer 9

FALSE

Question 10

Syntax errors will be detected when?

Answer 10

at compile time

Question 11

What are Attributes?

Answer 11

data contained in an object

Question 12

What are Methods?

Answer 12

procedures, or behaviors, that an object performs

Question 13

What is Encapsulation?

Answer 13

combining of data and code into a single object

Question 14

What is Data-Hiding?

Answer 14

refers to an objects ability to hide its data from code outside the object.

***an object hides its data but allows outside code to access methods that operate on the data

Question 15

Who originally developed Java and year developed as well year presented? Name of person and corporation (+ the name it has now)

Answer 15

in 1991 James Gosling at Sun Microsystems developed Java. (now known as Oracle Corp.) In 1995 presented.

Question 16

The purpose of validating the results of the program is:

Answer 16

To determine whether the program solves the original problem

Question 17

Syntax is:

Answer 17

Rules that must be followed when writing a program

Question 18

Software refers to:

Answer 18

Programs

Question 19

RAM is usually:

Answer 19

A volatile type of memory, used only for temporary storage

Question 20

One of the design tools used by programmers when creating a model of the program is:

Answer 20

Pseudocode

Question 21

Keywords are:

Answer 21

Words that have special meaning in the programming language

Question 22

Byte code instructions are read and interpreted by:

Answer 22

The JVM (Java Virtual Machine)

Question 23

A runtime error is usually the result of:

Answer 23

A logical error

Question 24

A program is a sequence of instructions stored in:

Answer 24

The computers memory

Question 25

A computer program is:

Answer 25

A set of instructions that enable the computer to solve a problem or perform a task

Question 26

A byte has how many bits?

Answer 26

8

Question 27

This is a software entity that contains data and procedures

Answer 27

Class

Question 28

These are used to indicate the end of a Java statement

Answer 28

Semicolons