Java Programming Test 1 Flashcards

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Questions and Answers

A Java program is best classified as:

malware

hardware

software (correct)

firmware

6 bits can be used to represent ________ distinct items.

When executing a program, the processor reads each program instruction from ________.

main memory

Which memory capacity is the largest?

12,000,000 megabytes Signup and view all the answers

Binary numbers are composed entirely of ________.

0s and 1s Signup and view all the answers

Volatility is a property of ________.

RAM Signup and view all the answers

The ability to directly obtain a stored item by referencing its address is known as ________.

random access Signup and view all the answers

Which phase of the fetch-decode-______ cycle might use a circuit in the arithmetic-logic unit?

execute Signup and view all the answers

In order for a computer to be accessible over a computer network, the computer needs its own ________.

network address Signup and view all the answers

For a computer to communicate over the Internet, it must use ________.

the combined TCP/IP protocol Signup and view all the answers

A URL (Universal Resource Locator) specifies the address of ________.

a document or other type of file on the Internet Signup and view all the answers

It is important to dissect a problem into manageable pieces before trying to solve the problem because ________.

most problems are too complex to be solved as a single, large activity Signup and view all the answers

Once we have implemented the solution, we are not done with the problem because:

all of the above Signup and view all the answers

Java is an example of:

a fourth generation language Signup and view all the answers

In the following list, which statement is not true regarding Java as a programming language?

It is a language whose programs do not require translating into machine language before they are executed Signup and view all the answers

Comments should ________.

be insightful and explain what the instruction's intention is Signup and view all the answers

The main method for a Java program is defined by ________.

public static main(String[ ] args) Signup and view all the answers

The line of Java code 'System.out.println("Hello");' will ________.

do nothing Signup and view all the answers

The instruction: System.out.println("Hello World"); might best be commented as ________.

// used to demonstrate an output message Signup and view all the answers

Which character below is not allowed in an identifier?

^ Signup and view all the answers

Which of the following is not syntactically legal in Java?

s t a t i c main(String[ ] args) Signup and view all the answers

Which of the following is a legal Java identifier?

i Signup and view all the answers

A unique aspect of Java that allows code compiled on one machine to be executed on a machine of a different hardware platform is Java's ________.

bytecodes Signup and view all the answers

Java is similar in syntax to what other high-level language?

C++ Signup and view all the answers

An error in a program that results in the program outputting $100 instead of the correct answer, $250 is ________.

a logical error Signup and view all the answers

Which of the following is true regarding Java syntax and semantics?

a Java compiler can determine if you have followed proper syntax but not proper semantics Signup and view all the answers

Study Notes

Java Basics

A Java program is classified as software.
6 bits can represent 64 distinct items.
During program execution, the processor reads instructions from main memory.

Memory and Data

The largest memory capacity is 12,000,000 megabytes.
Binary numbers consist exclusively of 0s and 1s.
RAM is characterized by volatility.

Accessing Data

The concept of random access allows direct retrieval of stored items using their addresses.
In the fetch-decode-execute cycle, the arithmetic-logic unit is utilized during the execute phase.

Networking

Computers require a unique network address for network accessibility.
Communication over the Internet necessitates the TCP/IP protocol combination.

URLs and Problem Solving

A URL specifies the address of a document or file on the Internet.
Decomposing complex problems into manageable pieces simplifies their resolution.

Solution Implementation

After implementing a solution, ongoing evaluation is essential due to potential inefficiencies, errors, or future specification changes.
Java is categorized as both a high-level language and a fourth-generation language.

Characteristics of Java

Java was introduced in 1995, is object-oriented, and supports web-based program execution.
Contrary to some beliefs, Java requires programs to be translated into machine language before execution.

Coding Practices

Comments in code should clarify the intent behind instructions.
The main method in Java is defined as public static void main(String[] args).
Code like // System.out.println("Hello"); serves as a comment and performs no action.

Identifiers and Syntax

Valid identifiers in Java can include characters like $, _, and letters but exclude characters like ^.
A piece of code written incorrectly like s t a t i c main(String[ ] args) is syntactically illegal.
The identifier i is a legal Java identifier, whereas class and idon'tlikeclass are not.

Java Execution Features

Java's bytecodes enable cross-platform execution; code compiled on one machine can run on different hardware.
Java syntax resembles C++, showcasing its high-level language structure.

Error Types

A logical error example is when a program outputs an incorrect amount, such as $100 instead of $250.
Java compilers can check for syntax but not always for semantics, which refers to the meaningfulness of the code.

Recap on Java Syntax and Semantics

A Java compiler verifies if syntax rules are followed, but semantic correctness relies on naming conventions and logical application within the program.

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Description

Test your knowledge of Java programming with these flashcards. This quiz covers key concepts such as memory, binary representation, and software classification. Prepare to reinforce your understanding of the fundamentals in Java.