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Which package is automatically imported in any Java program?

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Programming

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Mar 1, 2020

Cards (39)

Section 1

(39 cards)

Which package is automatically imported in any Java program?

Front

java.lang

Back

Which of the following is a valid constructor header for the Player class that accepts the player name as a parameter?

Front

public Player(String playername)

Back

The public constructors and methods of a class form the public ____ of the class.

Front

interface

Back

Which of the following statements about methods is correct?

Front

A method is a sequence of instructions that could access the data of an object

Back

Which of the following declares a variable that will store a measurement with fractional parts?

Front

double measure;

Back

In Java, every statement must end with which symbol?

Front

;

Back

The "building blocks" that Java programmers use to write computer programs are called

Front

objects

Back

What is a storage location in the computers memory called that has a type, name, and contents?

Front

variable

Back

Which statement about identifiers is correct?

Front

Identifiers can be made up of letters, digits, and the underscore character

Back

What term is used to refer to an individual instruction inside a method?

Front

statement

Back

Which special delimeter is used with the javadoc utility to document method arguments?

Front

@param

Back

Assume the Java statement : Circle c1 = new Circle(3); What does the variable c1 sotre?

Front

A reference to the memory location of the constructed Circle object.

Back

What contains sequences of programming instructions that describe how to perform a particular task?

Front

method

Back

When was Java officially introduced?

Front

1995

Back

By convention among Java programmers, variables begin with what?

Front

lowercase letter

Back

Which of the following statements about test programs is true?

Front

Test programs verify that methods have been implemented correctly. A test program calls methods and checks that they return the expected results.

Back

What tool translates high-level instructions into low level machine code?

Front

compiler

Back

No matter which Java development environment you use, what happens to the Java source code in order for a Java program to execute?

Front

A Java compiler translates the source code into class files

Back

Consider the following method comment and method header: Converts from a source measurement to a target measurement. @param _____ the measurement @return the input value converted to the target unit public double convertTo(double fromMeasurement){..} Fill in the blank

Front

fromMeasurement

Back

Why is it a good idea for a programmer to write comments about a method first, before implementing it?

Front

it is an excellent test to ensure that the programmer firmly understands what is needed

Back

We want to change the BankAccount class so that all accounts will have a monthly fee. Which of the following will properly define the instance variable monthlyFee that holds the monthly fee?

Front

private double monthlyFee;

Back

By convention among Java programmers, class names begin with what?

Front

uppercase letter

Back

Input to a method, enclosed in parentheses after the method name, is known as what?

Front

arguments

Back

Which of the following corresponds to a valid constructor header for the Player class?

Front

public Player()

Back

To use a class in another package you need to what?

Front

import it

Back

What is the Java Virtual Machine?

Front

A program that simulates a real CPU running compiled Java code.

Back

What is a collection of classes with a related purpose?

Front

package

Back

We want to change the BankAccount class so that all accounts will have a monthly fee. The instance variable monthlyFee will hold the monthly fee. Which of the following is the correct public interface for a constructor that sets both the initial balance and monthly fee?

Front

public BankAccount(double initialBalance, double monthlyFee)

Back

What is the name of the constructor for the BankAccount class?

Front

BankAccount

Back

The javadoc utility is used to what?

Front

automatically generate HTML pages that describe classes

Back

What is the purpose of the assignment operator?

Front

to change the value of a variable

Back

Every Java program consists of one or more of these fundamental building blocks.

Front

class

Back

What is the name of the type that denotes whole numbers?

Front

int

Back

What does API stand for?

Front

Application Programming Interface

Back

What term is used to refer to languages that allow programmers to describe tasks at a higher conceptual level than machine code?

Front

high-level

Back

Which of the following terms denotes the memory location of an object?

Front

object reference

Back

What is the name of the file that contains the Java source code for the public class?

Front

HelloPrinter.java

Back

Which import allows for the use of the rectangle class?

Front

import java.awt.Rectangle;

Back

Assuming the following Java statement: int num = 10; What does the variable num store?

Front

the numeric value 10

Back