Class Notes Flashcards by Paul Hankewicz

How many values does a bit represent

Two values

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How many values does 2 bits represent

4 values

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How many values does 3 bits represent

8 values

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What numbers define the binary number system

0,1

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How do you determine largest value if you have a base number

The largest value is 1 less then the base value

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What is the largest number for base 10

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What is the largest number for base 8

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What number of values do 4 bits have

16 values

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What is 1 byte equal to?

8 bits

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What is 1 byte considered

The smallest addressable memory unit

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How many values are in one byte

256 values

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What is 1MB in base 10

10^6

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What is 1GB in base 10

10^9

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What is 1TB in base 10

10^12

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Can values be both positive or negative?

Yes

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Values can either be …

Characters or numbers

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What are numbers with no decimal called

Intergers

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What are numbers with a decimal called

Floating point numbers

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What are the 4 interger types

byte
short
int
long

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What is the default type for intergers

int

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How many bytes does a byte represent

1 byte

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How many bytes does a short represent

2 bytes

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How many bytes does an int represent

4 bytes

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How many bytes does a long represent

8 bytes

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What are the two types of floating point numbers/types

Float and a double

How many bytes does a float represent

4 bytes

How many bytes does a double represent

8 bytes

If the first bit is 0 in an interger, is it positive or negative

Positive

If the first bit is 1 in an interger is it positive or negative

Negative

In an interger what does the first value represent

Sign bit

In an interger what does the second value represent

Exponent

In an interger what does the remaining bits represent (not the sign or exponent)

The mantissa

What is the default type for floating point numbers

Double

What are fractional numbers

Numbers with decimals

What does && mean

And

What does ll mean

What would 12 be interpreted as

An int

What would 12.0 be interpreted as

A double

What are the 8 primitive built in types for Java

Byte, short, int, long Float, double Char Boolean

What is a char used for

To store 1 character.

How much space does a char occupy

1 byte

What is Boolean used to represent

True or false

What are types in italics called

Interfaces

What type of class would be used to represent someone's name

String class

What does ' ' specify

A character

What does 'A' specify

The a character

What is \ called

The escape character

What does \ ' show up as

What does \ " show up as

What does \n do

New line

What does \t do

Tab

What do capital letters indicate when discussing types

A non primitive type

What are types

Values such as intergers

What happens if you introduce operations to a type

It then becomes a data type

What is a data type

A type + an operation

Describe programming in the 70s

Programming languages were called machine language., then assembly language. It was required that you use an assembler to compile and convert to binary to be more efficient.

What were low level programming languages

the early programming languages of the 70s

What are some examples of high level programming languages

Java, C, C++, Pascal etc

What is a high level programming language

Resembles the english language so it is easy for the programmer to understand

What was FORTRAN

an old school business oriented language

What was the disadvantage to the early programming languages

The disadvantage to the old programming languages was that they were very procedural and required knowing all of the procedures and how to use them

What are Java and C++ considered

project oriented languages

What is the difference between C and C++

C++ is the same as C but object oriented features included

What is the disadvantage to C++

Very complex after you get past introductory concepts

What was java created for

Created for unifying the programming behind microwaves, toasters etc

Was java created for a specific OS

No, it was created for a virtual machine

What would the purpose of Java's virtual machine be

Would translate to other OS and served to unify the whole operation

What is the difference between print and println

Println will print something and place it on the same line.

How do you comment out lines of code

// infront of the line or after curly bracket to comment out all of the code.

How do you choose variable names

1) name of variable must begin with a letter (can be of any length) 2) may only contain letters, digits, and underscore character

What is it called when you assign a number to a variable

initializing