U2: Data Types

Question 1

Primitive Data Types

Answer 1

byte; short; int; long; float; double; char; boolean

Question 1

Categories of Primitive Data

Answer 1

• Integers: byte; short; int; long
• Decimals: float and double
• Others: char and boolean

Question 2

short

Answer 2

• 16-bit signed two’s complement integer
• Range: -32,768 to 32,767

Question 3

byte

Answer 3

• 8 bit signed two’s complement integer
• Range: -128 to 127

Question 4

int

Answer 4

• 32-bit signed two’s complement integer
• Range: -2,747,483,648 to 2,747,483,647

Question 5

long

Answer 5

• 64-bit signed two’s complement integer
• Range: -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807

Question 6

float

Answer 6

• 32-bit IEEE 754 floating point
• Range: -3.4 x 10^38 to 3.4 x 10^38

Question 7

double

Answer 7

• 64-bit IEEE 754 floating point
• Range: -1.7 x 10^308 to 1.7 x 10^308

Question 8

char

Answer 8

• single 16-bit Unicode character
• Range: 0 - 65,565

Question 9

boolean

Answer 9

True or False

Question 10

Categories of Data in Java

Answer 10

• Primitives
• Objects (customized data type created from Classes)