question

This part of the computer fetches instructions, carries out the operations commanded by the instructions, and produces some outcome or resultant information

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CPU

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A byte is made up of eight

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bits

question

Each byte is assigned a unique

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address

question

This type of memory can hold data for long periods of time-even when there is no power to the computer

answer

secondary storage

question

If you were to look at a machine language program, you would see

answer

a stream of binary numbers

question

This type of program is designed to be transmitted over the Internet and run in a Web browser

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applet

question

These are words that have a special meaning in the programming language

answer

key words

question

These are symbols or words that perform operations on one or more operands

answer

operators

question

These characters serve specific purposes, such as marking the beginning or ending of a statement, or separating items in a list

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punctuation

question

These are words or names that are used to identify storage locations in memory and parts of the program that are created by the programmer

answer

programmer-defined names

question

These are rules that must be followed when writing a program

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syntax

question

This is a named storage location in the computer's memory

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variable

question

The Java compiler generates

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byte code

question

JVM stands for

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Java Virtual Machine

question

Every complete statement ends with a

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semicolon

question

The following data: 72 'A' "Hello World" 2.8712 are all examples of

answer

literals

question

A group of statements, such as the contents of a class or a method, are enclosed in

answer

braces { }

question

Which of the following are not valid assignment statements total=9; 72=amount; profit=129 letter='W';

answer

72=amount; profit=129

question

Which of the following are not valid println statements System.out.println + "Hello World"; System.out.println("Have a nice day"); out.System.println(value); println.out(Programming is great fun);

answer

System.out.println + "Hello World"; out.System.println(value); println.out(Programming is great fun);

question

The negotiation operator is

answer

unary

question

This key word is used to declare a named constant

answer

final

question

These characters mark the beginning of a multi-line comment

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/*

question

These characters mark the beginning of a single-line comment

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//

question

These characters mark the beginning of a documentation comment

answer

/**

question

Which Scanner class method would you use to read a string as input

answer

nextLine

question

Which Scanner class method would you use to read a double as input

answer

nextDouble

question

You can use this class to display dialog boxes

answer

JOptionPane

question

When Java converts a lower-ranked value to a higher-ranked type, it is called a

answer

widening conversion

question

This type of operator lets you manually convert a value, even if it means that a narrowing conversion will take place

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cast

question

A left brace in a Java program is always followed by a right brace later in the program

answer

true

question

A variable must be declared before it can be used

answer

true

question

Variable names may begin with a number

answer

false

question

You cannot change the value of a variable whose declaration uses the final key word

answer

true

question

Comments that begin with // can be processed by javadoc

answer

false

question

If one of an operator's operands is a double, and the other operand is an int, Java will automatically convert the value of the double to an int

answer

false

question

The if statement is an example of a

answer

decision structure

question

This type of expression has a value of either true or false

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boolean expression

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>,<, and == are

answer

relational operators

question

&&,||, and ! are

answer

logical operators

question

This is an empty statement that does nothing

answer

null statement

question

To create a block of statements, you enclose the statements in these

answer

braces{ }

question

This is a boolean variable that signals when some condition exists in the program

answer

flag

question

How does the character 'A' compare to the character 'B'

answer

'A' is less than 'B'

question

This is an if statement that appears inside another if statement

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nested if statement

question

An else clause always goes with

answer

the closest previous if clause that doesn't already have its own else clause

question

When determining whether a number is inside a range, it's best to use this operand

answer

&&

question

This determines whether two different String objects contain the same string

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the equals method

question

The conditional operand takes this many operands

answer

three

question

This section of a switch statement is branched to if none of the case expressions match the switch expression

answer

default

question

You can use this method to display formatted output in a console window

answer

System.out.printf

question

The = operator and the == operator perform the same operation

answer

false

question

A conditionally executed statement should be indented one level from the if clause

answer

true

question

All lines in a conditionally executed block should be indented one level

answer

true

question

When an if statement is nested in the if clause of another statement, the only time the inner if statement is executed is when the boolean expression of the outer if statement is true

answer

true

question

When an if statement is nested in the else clause of another statement, the only time the inner if statement is executed is when the boolean expression of the outer if statement is true

answer

false

question

The scope of a variable is limited to the block in which it is defined

answer

true

question

What will the println statement in the following program segment display int x=5; System.out.println(x++);

answer

5

question

What will the println statement in the following program segment display int x=5; System.out.println(++x);

answer

6

question

In the expression number++, the ++ operator is in what mode

answer

postfix

question

What is each repetition of a loop known as

answer

iteration

question

This is a variable that controls the number of iterations performed by a loop

answer

loop control variable

question

The while loop is this type of loop

answer

pretest

question

The do-while loop is this type of loop

answer

posttest

question

The for loop is this type of loop

answer

pretest

question

This type of loop has no way of ending and repeats until the program is interrupted

answer

infinite

question

This type of loop always executes at least once

answer

do-while

question

This expression is executed by the for loop only once, regardless of the number of iterations

answer

initialization expression

question

This is a variable that keeps a running total

answer

accumulator

question

This is a special value that signals when there are no more items from a list of items to be processed; this value cannot be mistaken as an item from the list

answer

sentinel

question

To open a file for writing, you use the following class

answer

PrintWriter

question

To open a file for reading, you use the following class

answer

File and Scanner

question

When a program is finished using a file, it should do this

answer

close the file

question

This class allows you to us the print and println methods to write data to a file

answer

PrintWriter

question

This class allows you to read a line from a file

answer

Scanner

question

The while loop is a pretest loop

answer

true

question

The do-while loop is a pretest loop

answer

false

question

The for loop is a posttest loop

answer

false

question

It is not necessary to initialize accumulator variables

answer

false

question

One limitation of the for loop is that only one variable may be initialized in the initialization expression

answer

false

question

A variable may be defined in the initialization expression of the for loop

answer

true

question

In a nested loop, the inner loop goes through all of its iterations for every iteration of the outer loop

answer

true

question

To calculate the total number of iterations of a nested loop, add the number of iterations of all the loops

answer

false

Java Chapters 1-4 – Flashcards

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