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Oracle基础级其他

Java Foundations (1Z0-811)

Oracle Java Foundations exam prep covering core Java syntax, data types, control flow, classes, objects, inheritance, interfaces, exceptions, and basic Java API usage. Includes 135 practice questions with explanations, a 150-minute exam format, and a 65% passing score.

Try the first chapter freePractice questions
75
Official exam questions
150 min
Exam duration
65/100
Passing score
JR ACADEMY / CERTIFICATION PREP

JR Academy practice bank

135practice questions
Build your foundation7 learning chapters
Practice with purposeFocused practice · answer explanations
Test your readinessMock exams · review

135 practice questions available

OverviewLearning pathFAQReviews
01

Understand the certification

Java Foundations 是 Oracle 认证路径中最简单的入门级,对在校生简历有微弱加分,但工作市场上几乎没有 JD 会提到这张证 — 直接考 1Z0-819 更划算。

Java Foundations (1Z0-811) 是 Oracle 面向零基础学习者的入门认证,75 题 / 150 分钟,及格线 65%(约 49 题),费用 $245 USD。覆盖 Java 基础语法(变量、数据类型、运算符)、面向对象基础(类、继承、多态、封装)、数组、String 操作、ArrayList、基本异常处理六大领域。

和 1Z0-808(OCA Java SE 8 Programmer I)相比,1Z0-811 难度明显更低:不考 Lambda、不考并发、不考 IO/NIO,纯粹是 Java 语法和 OOP 基础。适合还在学 Java 的大一大二学生或编程培训班学员,作为学习阶段的里程碑验证。

Oracle 将这张证定位为 "Oracle Certified Junior Associate",但这个头衔在求职市场上没有实际影响力。LinkedIn 上搜 1Z0-811 的持证人数不到 5000(对比 1Z0-819 约 15 万),招聘 JD 里从不要求 Java Foundations 认证。

Exam at a glance

Exam code
1Z0-811
Provider
Oracle
Format
Single choice / Multiple select
Language
English / 日本語
Validity
No expiry
Exam fee
$245
Official certification page

Skills in focus

Oracle 技术数据库管理系统架构性能优化故障排除

Learning outcomes

  • Prepare for the Oracle 1Z0-811 exam with a beginner-friendly study plan
  • Understand the core Java concepts needed for later certification paths
  • Write and read simple Java programs with more confidence
  • Build a stronger starting point for Java development roles

Who this is for

  • Students starting with Java for the first time
  • IT professionals who want a structured introduction to Java
  • Beginners preparing for the Oracle Java Foundations exam
  • Anyone planning to continue on to Java SE 8 or Java SE 11 certification

Before you start

  • No prior Oracle certification is required
  • Basic computer literacy is enough to start
  • A willingness to practice simple Java programs is recommended

What do you still need before the Oracle 1Z0-811 exam?

Tell us what you do now and where you want to go. See your gaps in skills, evidence, experience, expression and positioning, and what to work on first. No sign-in needed.

Compare with my situation
02

Your learning path

7 chapters

011Z0-811 考试概述与备考指南Free02Java 基础概念与开发环境Free03数据类型、变量与运算符70 min04控制流语句与数组80 min05类、对象与方法90 min06继承、接口与异常100 min
View the full learning path

Plan your preparation

Learning hours
20h
With relevant experience
2-3 weeks
Starting from scratch
6-8 weeks
Daily study
1-1.5h

Included in your preparation

  • 135 practice questions focused on Java fundamentals
  • Coverage of syntax, data types, control flow, classes, objects, inheritance, interfaces, and exceptions
  • Mock exam aligned to the official 75-question, 150-minute format
  • Simple explanations built for first-time Java learners
  • Clear study flow for people who need a guided entry into Java

1. 第一阶段:Java 基础语法(2-3 周)

安装 JDK 17+,用 IntelliJ IDEA Community 或 VS Code 写代码。重点练习原始数据类型(int/double/boolean/char)的类型转换规则、String 不可变性和 String Pool、数组声明和遍历。每天写 5-10 个小程序。

2. 第二阶段:OOP 四大特性(2-3 周)

封装(private + getter/setter)、继承(extends + super)、多态(方法重写 + 向上转型)、抽象(abstract class + interface)。考试最爱考的陷阱:方法重载(Overload)和重写(Override)的区别、this 和 super 在构造函数中的调用顺序。

3. 第三阶段:集合 + 异常 + 模考(1-2 周)

ArrayList 的基本操作(add/remove/get/size/contains)、for-each 遍历。try-catch-finally 执行顺序、常见异常类型(NullPointerException/ArrayIndexOutOfBoundsException/ClassCastException)。用 Enthuware 1Z0-811 或 MyExamCloud 做 2-3 次模考。

03

Career value

1Z0-811 的职业价值有限。在澳洲市场,Graduate Java Developer 的入门薪资约 $65-80K AUD,但这个薪资和有没有 1Z0-811 无关 — 企业看的是大学成绩、项目经验和面试表现。

唯一的实际用途是:如果你正在学 Java(大学课程或 bootcamp),拿到这张证可以验证自己的基础扎实程度,同时为后续考 1Z0-819(OCP)建立信心和学习节奏。

不适合的人群:有 1 年以上 Java 工作经验的人 — 直接考 1Z0-819,这张证对你来说太简单了。目标不是 Java 方向的开发者 — 花 $245 考一张没有求职价值的证不如拿去买 Udemy 课程。

Junior Java DeveloperGraduate Developer初级 Java 开发
澳洲
AUD 60,000 – 80,000
美国
USD 55,000 – 75,000
中国
CNY 100,000 – 180,000

Preparation tips

  • 75 题 150 分钟,时间充裕。代码输出题先手动在纸上跑一遍,不要凭直觉选。
  • 每道题的选项里通常有一个"编译错误"选项 — 先判断代码能否编译,如果能,再分析运行结果。
  • String 方法(substring/charAt/indexOf/length)的参数是 0-based index,但 length() 返回的是实际长度。substring(1,3) 包含 index 1 和 2,不包含 3。

Common mistakes

  • **String 比较用 == 而不是 .equals()** — `new String("abc") == new String("abc")` 返回 false,因为比较的是引用地址。这是 Java 初学者最经典的坑,考试至少 2-3 道。
  • **数组越界不是编译错误** — `int[] arr = new int[3]; arr[5] = 1;` 编译通过但运行时抛 ArrayIndexOutOfBoundsException。考试喜欢问"这段代码会怎样"。
  • **构造函数不能有返回类型** — 如果写了 `void MyClass()` 就变成普通方法而非构造函数,不会在 new 时自动调用。
04

Before you register

How difficult is the 1Z0-811 exam?

The 1Z0-811 exam contains approximately 75 questions with a 150-minute time limit, requiring a passing score of 65%. We recommend systematic study combined with extensive practice questions to prepare.

What is the exam fee and validity period?

The 1Z0-811 exam costs $245 USD. Oracle certifications typically do not have a fixed expiration date, but it is recommended to update regularly to stay current with the latest technologies.

How do I register for the exam?

You can register through the Oracle University website or Pearson VUE test centers. Both online proctored and in-person testing options are available.

05

Learner experiences

Loading reviews…

学校 Java 课学完后花 5 周准备。题目不难但阅读量大,75 题 150 分钟看起来时间够,实际上代码阅读题需要反复看。最容易错的是类型转换 — int 到 double 自动转换没问题,double 到 int 必须强制转换,忘了加 (int) 就编译错误。

大二 CS 在读

无工作经验 · 82% · 5 weeks

险过。OOP 那块考得比想象中细 — 构造函数链(子类构造函数默认调用 super())出了好几道。建议把继承和多态的规则整理成表格反复看。

Bootcamp 学员

转行学 Java · 71% · 8 weeks

06

Compare your next options

Oracle 1Z0-808

Oracle · 助理级

77 questions · 150 min

Oracle 1Z0-819

Oracle · 专业级

50 questions · 90 min

PCEP-30-02

其他 · 基础级

65 questions · 90 min

Done reading? Next steps

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Tell us what you do now and where you want to go. See your gaps in skills, evidence, experience, expression and positioning, and what to work on first. No sign-in needed.

Compare with my situation
  • SkillPractise Oracle 1Z0-811 by exam domainQuestions are grouped by the official exam domains, so you can see which domain still needs work.Open the question bank →
  • SkillOracle 1Z0-811 learning pathWork through the exam scope chapter by chapter, then come back to the questions.See the learning path →
  • ExpressionExplain it in an interviewRun a mock interview for a role that uses this certification and turn what you studied into project stories.Practise an interview →

Start with the first chapter.

2 free chapters · Full preparation from $29

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