Quick Answer
The answer is yes, static methods can modify static variables. This is correct because a static variable belongs to the class itself rather than any specific instance, and a static method operates at the class level, giving it direct access to modify that shared class data. On the Oracle Java Foundations 1Z0-811 exam, this concept tests your understanding of static context and the distinction between class-level and instance-level members. A common trap is assuming static methods cannot change any variables, but they can freely modify static variables—they just cannot access non-static instance variables directly. Remember the memory tip: "Static to static is automatic; static to instance is problematic."
This 1Z0-811 practice question tests your understanding of java basics and syntax. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A class defines a static variable initialized at declaration: static int count = 10;. A static method attempts to modify it: count = 20;. Which statement is true?
The variable cannot be accessed from a static method
Why wrong: Static methods can access static variables directly.
The code causes a compilation error
Why wrong: Static methods can access static variables.
The variable can be changed to 20
Static variables are modifiable unless declared final.
The variable is read-only
Why wrong: No final keyword, so it is not read-only.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The variable can be changed to 20
Option C is correct because static variables belong to the class, not instances, and can be accessed and modified by static methods. The assignment `count = 20;` is valid and changes the value from 10 to 20 at runtime.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The variable cannot be accessed from a static method
Why it's wrong here
Static methods can access static variables directly.
The code causes a compilation error
Why it's wrong here
Static methods can access static variables.
The variable can be changed to 20
Why this is correct
Static variables are modifiable unless declared final.
Related concept
Read the scenario before looking for a memorised answer.
The variable is read-only
Why it's wrong here
No final keyword, so it is not read-only.
Common exam traps
Oracle often tests the misconception that static methods cannot access static variables, or that static variables are implicitly final, leading candidates to choose compilation error or read-only options.
Trap categories for this question
Keyword trap
No final keyword, so it is not read-only.
Detailed technical explanation
Static variables are stored in the method area (or heap, depending on JVM implementation) and are initialized when the class is loaded. The assignment `count = 20;` directly modifies the single copy shared across all instances. In real-world scenarios, such as configuration counters or shared state, static variables must be used with caution in multithreaded environments to avoid race conditions.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 1Z0-811 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Java Basics and Syntax — This question tests Java Basics and Syntax — Read the scenario before looking for a memorised answer..
The correct answer is: The variable can be changed to 20 — Option C is correct because static variables belong to the class, not instances, and can be accessed and modified by static methods. The assignment `count = 20;` is valid and changes the value from 10 to 20 at runtime.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This 1Z0-811 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-811 exam.
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