procedural programming with Java

Question 1

Objects within a class:(2)

Answer 1

-have the same methods
-can have different data associated with them

Question 2

syntax

Answer 2

describes allowed arrangements of words and
punctuation in a program (how you write a program)

Question 3

semantics

Answer 3

describes what happens when you run the
program

Question 4

There are three commonly recognized types of errors:

Answer 4

syntax error– grammatical mistake in the program
run-time error– error that is not detected until program is run
logic error– mistake in the underlying algorithm for the
program(the outcome is wrong)

Question 5

Variable

Answer 5

a data container that stores the data values during
program execution.

Question 6

identifier, rules for constructing identifiers:

Answer 6

The name of a variable or other item in a program,

must not start with a digit
all the characters must be letters, digits, the symbols _ or $

Question 7

The size range of the integer type

Answer 7

−2^(31) to 2^(31) − 1

Question 8

Memory used for boolean

Answer 8

1 byte

Question 9

Memory used for char

Answer 9

2 bytes

Question 10

Memory used for short

Answer 10

2 bytes

Question 11

Memory used for int

Answer 11

4 bytes

Question 12

Memory used for long

Answer 12

8 bytes

Question 13

Memory used for float

Answer 13

4 bytes

Question 14

Memory used for double

Answer 14

8 byte

Question 15

scientific notation or floating-point notation

Answer 15

The literals with an e or E (for exponent) 3.67e5

Question 16

You can assign a value of any type in the following list to a variable of any type that appears further down in the list:

Answer 16

byte -> short -> int -> long -> float -> double

Question 17

Operators are classified based on how many operands they take.
The classes are:

Answer 17

unary (one operand),
e.g.-12, a++, !flag
binary (two operands),
e.g. a * b, c&raquo_space; 1, f || g
ternary (three operands),
e.g. flag ? “YES” : “NO”

Question 18

Java allows to form expressions using variables, constants, and the arithmetic operators:

Answer 18

+ (addition), − (subtraction), ∗ (multiplication),
/ (division), % (modulo, remainder)

Question 19

Java Precedence Rules

Answer 19

expr++, -expr∼ !, * / %, + -, shift, < > <= >= instanceof, == !=, &, ^, |, &&, ||, ? :, = +=

Question 20

associativity rules

Answer 20

Unary operators have right to left associativity,
Binary operators have left to right associativity,
Assignment operators (unlike the other binary operators) have
right to left associativity,
The ternary operator has right to left associativity

Question 21

postfix

Answer 21

increment and decrement expressions evaluate to the
existing value of the variable and only afterwards update it

Question 22

prefix

Answer 22

increment and decrement expressions first update the value of the variable and then evaluate to this value

Question 23

raional operators

Answer 23

==, >, <

Question 24

logical operators

Answer 24

! NOT, negation
|| Logical OR, disjunction
&& Logical AND, conjunction

Question 25

short-circuited logical operators

Answer 25

&& ||
stop the evaluation as soon as the result is determined

Question 26

long-circuited logical operators

Answer 26

& |
always evaluateboth operands, regardless of the result of the first operand

Question 27

type casting

Answer 27

(Type)Expression