GRUDGEBALL - Unit 1 Fall 19

Input Basics

100

What class is used to read from the keyboard?

Scanner

200

What function is used to read a String value from the user?

nextLine()

300

Name one way of giving input to a computer program that is not a keyboard.

Voice, mouse, touchscreen, console, VR headset, etc.

400

Which of these is NOT a Scanner library call (to the best of your knowledge):

A. nextBoolean()

B. nextDouble()

C. nextChar()

nextChar()

500

//Will this code print the user entered value?

Scanner kb = new Scanner(System.in);

S.O.P("Who is your daddy and what does he do: ")

kb.nextLine();

NO.

Data Types

100

What is a Data Type?

The kind of information stored in a variable.

200

Name a non-primitive data type.

String, Scanner

300

What's the difference between int and double?

int - whole number

double - decimal

400

An error with Data Types is considered a ______ Error.

Compile-Time

500

A String is made of ________.

chars

Parts of Coding Language

100

What is the correct symbol for a comment?

// and/or /* */

200

This is a direct representation of data in the code.

Literal

300

This refers to a specific place in computer memory and the current value stored there.

Variable

400

These have specific, unchangeable meaning in the computer language.

Key Word

500

This is code that someone else wrote that you can use.

Library

Where's the Error?!

100

System.out.printl("Hello!");

println

200

int x = 4.5;

4.5 is not a whole number

300

int x = kb.nextLine();

should be nextBoolean()

400

Scanner kb = new Scanner();

Scanner(System.in);

500

System.out.println("5 + 4");

Logic Error

How Do I Code That?

100

Print "Hello World!"

System.out.println("Hello World!");

200

Declare and Initialize a String Variable called x to the literal text value hello

String x = "hello";

300

What block in Scratch temporarily stores the data typed by the user?

answer

400

Create the Scanner object kb

Scanner kb = new Scanner(System.in);

500

Write the import statement needed for the Scanner library

import java.util.*;

or

import java.util.Scanner;