Basic Definitions

Question 1

Operator

Answer 1

Operators are symbols that tell the compiler to perform specific mathematical or logical manipulations

Or

A symbol that defines the type of calculation to perform, and the order in which to do it

Question 2

Algorithm

Answer 2

A set of step by step instructions used to solve a problem

Question 3

Pseudocode

Answer 3

Pseudocode is a detailed, human-readable description of what an algorithm must do expressed in natural language.

Question 4

Function

Answer 4

A system defined formula that may require user input and returns a value.

Also defined as action taken by the code

Question 5

Condition

Answer 5

Conditions are branches that direct the code.

Question 6

Boolean Expression

Answer 6

A question that has a true/false or yes/no answer.

Question 7

Loop

Answer 7

A loop is an instruction that repeats until a specified condition is reached

Question 8

Variable

Answer 8

Variables store data for processing. In java, each class has certain class variables (its attributes) such as name, age, dob.

E.g.= int (234)
String (“hey bro”)
Double (2.44)

You can declare a variable and assign it a type, such as:

String name:(“david”);

Question 9

Threads

Answer 9

Getting the computer to do multiple things at once

Question 10

String

Answer 10

A string is 0 or more characters in double quotes, like “hello, world” 0/

Question 11

Array

Answer 11

A collection of variables of the same type

Question 12

Method

Answer 12

Aka functions. Called methods in Java

Question 13

Main

Answer 13

A function that is the starting point of every class in Java

Question 14

The main method

Answer 14

Public Static Main Void (String [] args)

Public means anyone/any class can access
Static means it can run without an instance of class 
Main is the name of class
Void means no value will be returned

Question 15

Instance

Answer 15

Each object is called an instance of a class

Question 16

printIn

Answer 16

A method that can be accessed by System. Class and out. Stream

System.out.printIn

Question 17

System.out.print vs System.out.printIn

Answer 17

The ‘In’ causes words to be printed on a new line

Question 18

Primary key

Answer 18

1) In SQL, primary key is a field in the table that uniquely identifies the table records.
2) One table can have ONE.
3) Its value must be different for each row in the table!
4) It cannot contain a null value

Question 19

SQL

Answer 19

Structured Query Language