Java Practice Exam 1

IT Specialist - Missed Questions

Order of Commands to Run a Function

1) javac [classname].java

2) [classname] [arg1] [arg2]

True or false…classes can contain main methods

True

Double

3.14

byte

1

short

5000

int

33000

float

3.14f

True or false…Strings can be null

False

Double to integer/Double to byte

Whole number, drop the decimals; no rounding up or down

Vector

Synchronized for thread safety

LinkedList

Used for frequent insertions and deletions without shifting items.

HashSet

A list that does not allow duplicate entries.

Order of do while loops

do{ }while (condition)

Class naming for inheritance

extends

Using a method from a parent class

super

getMessage

Displays details of an exception

InputMismatchException

Occurs when an incorrect data type is entered or read

IOException

Occurs when a file being read from does not exist

All scanner errors…

Are sourced from the scanner class