Comp Sci Java
What does API stand for?
Application Programming interface
What are bytecodes?
Bytecodes are a computer object code that is converted into machine code to be read by a computer's processor
What is an interpreter?
Developed to use high level programs directly
What does the JVM do?
Enables a computer to run java programs as well as other programs that are also compiled in java bytecode
What is encapsulation?
Encapsulates all the adjectives that makes up the thing (the color of the button and the size of the button makes up the button)
What does EE stand for in Java EE?
Enterprise edition
What is Moore's Law?
Every year or 2, the capacities of computers doubles without the price rising at all, named after Gordon Moore
What does HTML stand for?
Hypertext markup language
What does IDE stand for?
Integrated development environment
What does JVM stand for?
Java Virtual Machine
What is instantiation?
Just like someone needs to build the car from its drawings, you must build an object of a class (instantiation) before a program can perform its tasks
"Performing a task in a program requires a _______."
Method
What does ME stand for in Java ME?
Micro edition
What is information hiding?
Objects communicate with other objects but they are not allowed to know how the other object is implemented, as they are hidden within the object themselves
What company created the Java language?
Oracle
What are the Java APIs?
Pre-installed libraries, like java.util
What does the "javac" program do?
Reads source files written in java, and compiles them into bytecode class files
What is software reuse?
Reusing existing software when building new ones to save time and effort
What does SDK stand for?
Software development kit
What is an operating system?
Software systems that make using computers more convenient for us
What does SE stand for in Java SE?
Standard edition
hat are the five steps in creating a Java program and what is done in each step?
Step 1: Edit Step 2: Compile Step 3: Load Step 4: Verify Step 5: Execute
What is a kernel?
The core components of an OS
What is a method call?
When you press a pedal in the car, it sends a message to the car to tell it to go faster, similarly you need to send messages to the program, these messages are called member call functions
What is inheritance?
You make a piece of software for a student, but you want to make one for a gifted student, you take the original student code and build off of it
"A program unit called a ______ houses the set of _____ that perform that ______'s tasks."
class, methods, class
Function vs method
method is simply a function that is combined within a class. Since "everything" in Java is a class, that means every function is considered a method.
"Almost any ______ can be reasonably represented as a software object in terms of _____ and _____."
noun, attributes, behaviors
The Javac program produces a file with what extension?
.class
What extension do Java files end with?
.java
What are the five levels of a data hierarchy?
1. Bits 2. Characters 3. Fields 4. Records 5. Files
Every computer has the following six sections:
1. Input unit 2. Output unit 3. Memory unit 4. Arithmetic and logic unit (ALU) 5. Central processing unit (CPU) 6. Secondary storage unit
What are the three general types of programming languages?
1. Machine languages 2. Assembly languages 3. High-level languages
What is an instance variable?
A variable which is declared in a class but outside of its constructors, methods, or blocks
What happened in the mid-1990s to encourage the development of Java programs?
The rise of the world wide web.
What is a data hierarchy?
The way computers process data, they go from smallest to largest and more complex in structure
What was the original key goal of Java?
To develop a small, portable, reliable, distributed, real-time operating platform
What is an assembler?
Translates assembly languages into machine language at computer speed
What is a compiler?
Translates high-level programs into machine language programs at computer speed
