1Z0-811 Primitives, Strings and Operators Practice Question
Exhibit
public class BooleanCheck {
public static void main(String[] args) {
boolean a = true;
boolean b = false;
boolean c = a || b && !a;
System.out.println(c);
}
}Refer to the exhibit. What is the output?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
true
The expression evaluates to true. Operator precedence: ! highest, then &&, then ||. Given typical values (a=false, b=true), !a=true, then b && !a = true && true = true, then a || (b && !a) = false || true = true. Thus output is true. Option A is incorrect because the expression yields true, not false. Option C and D are incorrect as there is no exception or compilation error.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
false
Why it's wrong here
Incorrect precedence evaluation.
- ✓
true
Why this is correct
!a false, b && false false, a || false true.
- ✗
NullPointerException
Why it's wrong here
No objects.
- ✗
Compilation error: invalid operator
Why it's wrong here
Valid boolean logic.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 1Z0-811 question from scratch — 481 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.