Data types

Question 1

It describes the possible operations on the data and the storage method.

Answer 1

Data types

Question 2

(Agarwal & Bansal, 2023)
_______ are built into the Java language. These are data that are not objects and have no
methods. The Java compiler has detailed instructions on the valid operations this data type supports.

Answer 2

Primative Datatypes

Question 3

are built into the Java language. These are data that are not objects and have no
methods.

Answer 3

Primitive Data Types

Question 4

The name will be stored as characters, the age
will be stored as a numeric value, and the address will be stored as an alphanumeric value, what is this? .

Answer 4

Data Types

Question 5

Recite the 8) Primitive types that Java defines.

Answer 5

•Byte
•Short
•Int
•Long
•Float
•Double
•Char
•Boolean

Question 6

what is the bit size of Byte?

Answer 6

8

Question 7

what is the bit size of Short?

Answer 7

16

Question 8

what is the bit size of int?

Answer 8

32

Question 9

what is the bit size of Long?

Answer 9

64

Question 10

what is the bit size of Float?

Answer 10

32

Question 11

what is the bit size of double?

Answer 11

64

Question 12

what is the bit size of char ?

Answer 12

8

Question 13

what is the bit size of boolean?

Answer 13

1

Question 14

Java defines Byte, Short, Int, and Long as?

Answer 14

Integer Data Types

Question 15

It defines the sign of an integer
value, and Java manages it differently by adding a special “unsigned right shift” operation.

Answer 15

High-order bit

Question 16

The smallest integer type that represents a small number.

Answer 16

Byte

Question 17

An integer is considered _____ if its value is between -32768 and 32767. This data type
declare a variable that can hold numbers in that range.

Answer 17

Short

Question 18

A hexadecimal number can also be initialized as a Short variable instead of a normal decimal integer.
So, the 3001 integer can be written as

Answer 18

0x4A8

Question 19

This data type can handle larger numbers and is considered the best choice when an integer is
needed because when Byte and Short values are used in an expression, they are promoted to ___
automatically.

Answer 19

int

Question 20

This data type holds a number higher than a regular integer. The ____ integer is a variable that
can hold a very large number. A capital letter ‘L’ is placed right after the value.

Answer 20

Long

Question 21

Floating Point Types are used when evaluating an expression that needs
fractional accuracy such as the computation of square root or a transcendental (sine and cosine).What are these?

Answer 21

•float
•double

Question 22

A real number qualifies as a single precession
when it only needs a limited number of bits. Single precision takes half the space of a double
precision and is much faster on some processors. What data type is this?

Answer 22

Float

Question 24

_____ precision can be faster than single precision on modern processors that have been
optimized for high-speed mathematical calculations. It can handle larger numbers than Float.

Answer 24

Double

Question 25

Character types can be divided into two (2):

Answer 25

(a) A Byte for a character (ASCII) and (b) a type in itself (Unicode)

Question 26

a code that assigns numbers to letters, digits, etc.) number.

Answer 26

ASCII ( American Standard Code for Information Interchange )

Question 27

To support characters that are not traditionally used in (US) English and do not work with compilers, the ____ character format was created which includes Latin-based and non-Latin-based languages.

Answer 27

Unicode

Question 28

It allows Byte data types to be used to declare a variable that would hold a single character to initialize such variable or assign a single quoted character.

Answer 28

ASCII ( American Standar Code for Information Interchange )

Question 29

This data type is used for logical values and can only hold true or false values. It is a type returned by all relational operators such as =, >, and <.

Answer 29

boolean

Question 30

____ is an abstract data type that can store letters, digits, and other characters such as a slash (/), comma (,), parentheses (()), semi- colon (;), dollar sign ($), and a hashtag (#).

Answer 30

String

Question 31

These are based on primitive data types but with more functionality.

Answer 31

Abstract Data Types

Question 32

As mentioned, all variables in Java must be declared first before they can be used. The basic format of a variable declaration is as follows:

Answer 32

Data Type identifier [= value] [, identier] [= value];

Question 33

______ are true or false and cannot use numbers to represent them.

Answer 33

Boolean Literals

Question 34

are numeric data that can be represented as octal, hexadecimal, and binary literals.

Answer 34

Integer Literals

Question 35

____ is the number with a zero prefixed.

Answer 35

Octal

Question 36

____ is the number prefixed with 0x.

Answer 36

Hexadecimal

Question 37

is the number that starts with 0B or 0b. An underscore (_) can be used to improve the readability of the numeric data.

Answer 37

Binary Literal

Question 38

_____ are numbers that have a decimal fraction. A suffix letter F (lower or uppercase) to the number; otherwise, the compiler will flag about loss of precision.

Answer 38

Floating Point Literals

Question 39

must also be enclosed in single quotes (‘,’). The Unicode value of the character is also allowed.

Answer 39

Character Literals

Question 40

are enclosed in double quotes (","). Strings are included as literal as they can still be typed directly into the code, even though it is not a primitive type.

Answer 40

String Literals

Question 41

Recite the rules for naming variables.

Answer 41

The name of a variable must be meaningful, short, and without any embedded space or symbol like ?, !, @, #, %, ^, &, ( ), [, ], {, }, ., 1, “c/, and \. However, underscores (_) can be used wherever a space is required. For example, monthly_Salary. • Variable names must be unique. For example, to store five (5) different numbers, five (5) unique variable names need to be used for each. • A variable name must begin with a letter, a dollar sign, or an underscore, which may be followed by a sequence of letters (any case) or digits (0-9), `$’, or an underscore. • Keywords cannot be used for variable names. For example, a variable called “switch” cannot be declared

Question 42

Recite the Java variable naming conventions.

Answer 42

Variable names should be meaningful. • The names must reflect the data that the variables contain. To store the gender of an employee, the variable name could be emp_gender. • Variable names are nouns and must begin with a lowercase letter. • If a variable name contains two or more words, begin each word with an uppercase letter. However, the first word will start with a lowercase letter.