CSIS-1340 Data Types Quiz

Value: "My dog has fleas!"

string fleas; //creation of string sting = "My dog has fleas!"; //initialization of variable in string

A variable that has been declared to be boolean type can be initialized with the value 0.

False

Class type names always begin with a small letter in Java.

False

String is a primitive data type in Java.

False

The statement that identifies the data type of a variable is known as initializing the variable.

False

Value: new Keyboard( )

Keyboard key; //Initialization of keyboard key = new Keyboard(); //assigning variable to keyboard

All data types in Java can be classified as either a primitive type or a class type.

True

All variables must be declared BEFORE the variable can be used in the program.

True

Data types are used by the compiler to identify the amount of space in memory that a variable of that type will need.

True

Every variable in a Java program must be declared.

True

Keyboard is a class type in Java.

True

Variable names always begin with a small letter in Java.

True

Consider the following Java if-then-else expression: if ( !done && (a > ( 3 + b ) ) ) { x = "ABC"; y = (5 < b); } else { done = z; } Use the context in the above code to declare the data type of the following variables. int done; double a; int b; String x; boolean y; char z;

int done: boolean double a: double int b: int String X: String boolean y: boolean char z: boolean

In questions 11-15 I will show you a value. You must declare a variable with any name you choose. The data type (either primitive or class type) must be correct. In a separate statement, assign the variable with the value. For example, if I show the follwing: Value: -578

int n1; //Variable Declaration n1 = -578 //Variable assignment