Lec 2: Intro to Java

Question 1

What are the 3 lvs of programming languages?

Answer 1

Machine language
Assembly Language
High-level language

Question 2

What level of language describes binary instructions?
a) Machine language
b) Assembly language
c) High level language

Answer 2

Machine

Question 3

What language was developed to make programming easier than machine code?

Answer 3

Assembly

Question 4

What language is this from?
ADDF3 R1, R2, R3

Answer 4

Assembly

Question 5

What level of programming language is english-like and easy to learn/understand

Answer 5

High level

Question 6

What level of programming language is this from?
area = 5 * 5 * 3.1415

Answer 6

High level

Question 7

What is the name of a program written in high level called?

Answer 7

Source code or source program

Question 8

What is the name of the program that is used to convert assembly language to machine code?

Answer 8

Assembler

Question 9

True or False: A source program must be translated into machine code for execution

Answer 9

True

Question 10

What is the use of an interpreter

Answer 10

Translation from high level to machine code

Question 11

What is the name of the java compiler

Answer 11

javac

Question 12

What is the name of the interpreter for java

Answer 12

java

Question 13

True or false:
Java is a strongly typed language

Answer 13

true

Question 14

True or false:
Every Java program must have at least one class

Answer 14

true

Question 15

True or false:
In order to run a class, the class must contain a method named main

Answer 15

true

Question 16

From where is the program executed?

Answer 16

From the main method

Question 17

What are the uses of identifiers?

Answer 17

identify the elements such as classes, methods, and vars

Question 18

True or false:
An identifier must start with a letter, an underscore, or a dollar sign

Answer 18

True

Question 19

True or false:
An identifier cannot be a reserved word

Answer 19

True

Question 20

_ is a software that interprets java bytecode

Answer 20

java virtual machine

Question 21

java compiler that translate java source code into _

Answer 21

java bytecode by javac cmd

Question 22

What is the java virtual machine or JVM?

Answer 22

interprets java bytecode by running the java command

Question 23

What is the Java interpreter

Answer 23

The Java Virtual Machine, by the java command, reads the already compiled java bytecode to execute

Question 24

File formats that the javac compiler takes in to compile

Answer 24

.java

Question 25

_ contains predefined classes and interfaces for developing Java programs

Answer 25

Java API

Question 26

main method header is

Answer 26

public static void main(String[] args)

Question 27

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

Answer 27

javac Test.java

Question 28

What file format is where javac storing the bytecode?

Answer 28

.class

Question 29

What file type is source code stored in?

Answer 29

.java

Question 30

How to make comments?

Answer 30

** comment **
–comment

Question 31

List common reserved words

Answer 31

void
public
static
class

Question 32

What is a block of code enclosed in?

Answer 32

{}