Module 1: Introduction into Programming

Question 1

What is Programming?

Answer 1

A series of instructions for a computer to follow

Question 2

What is code?

Answer 2

Human readable instructions that a computer can understand (interpret)

Question 3

What is a command?

Answer 3

Often referred to as a statement or singular instruction, the list of commands we would give our compiler.

Question 4

What type of programming is Java?

Answer 4

Object-oriented

Question 5

Is Java a high-level language, or a low-level level language?

Answer 5

High-level programming language

Question 6

What does it mean to be object-oriented?

Answer 6

That it has the constructs of classes and objects built into the language

Question 7

Is Java a loosely-typed or strongly-typed programming language?

Answer 7

Strongly-typed

Question 8

What does it mean to be a strongly-typed programming language?

Answer 8

Our variables and method types must be declared in advanced.

Question 9

What is the Java virtual machine (JVM)?

Answer 9

A special program that knows how to execute the programs that you write in Java.

Question 10

What is JRE (Java Runtime Environment)?

Answer 10

A set of components to create and run Java applications. It contains all the runtime libraries that your code will be calling and using.

Question 11

What is JDK (Java Development Kit)?

Answer 11

A software development environment used for developing Java applications. It provides developer tools like a compiler, debugger, documentation tools (javadoc) and other command-line utilities.

Question 12

What is an integrated development environment (IDE)?

Answer 12

Used for programming and Java; many also provide functionality for other languages. IDEs is typically provide a code editor, a compiler or interpreter, and a debugger that the developer accesses through a unified graphical user interface (GUI). Examples: Eclipse, Netbeans, and Intellij, etc.

Question 13

How does Java work?

Answer 13

Step 1: the developer would write the source code in which the JDK would compile and turn the source code into bytecode.
Step 2: the JRE then uses the JVM to run the code and processes the bytecode line by line using the JIT. (source code—> bytecode)
Step 3: Finally, the JIT compiler turns the bytecode into machine code, basically line by line.

Question 14

What is Compile Time?

Answer 14

When source code is converted at one time to bytecode.

Question 15

What is Runtime?

Answer 15

When Java uses the JIT, the bytecode that the developer wrote is then turned into instructions for the machine to execute.

Question 16

What is a package?

Answer 16

A collection of classes and interfaces that provides a high-level layer of access protection and name space management.

Question 17

Where should the package declaration be in my code?

Answer 17

The package declaration must ALWAYS be in the first line (non-commented) line in a .java file