Assertions Questions and Answers
Assertions questions with answers in Java programming test a candidate’s ability to debug and validate logic efficiently. The assert keyword is used to verify assumptions during program execution, ensuring code reliability and preventing logical errors. Many placement tests from companies like TCS, Infosys, and Wipro include Java Assertion MCQs to evaluate coding fundamentals. This section offers a collection of Java programming questions and answers with explanations to help you understand the use, syntax, and runtime behavior of assertions. Practice these questions to strengthen your programming logic and prepare effectively for technical interviews and coding tests.
Assertions
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45 questions
41. How to enable assertions for a specific class only?
- -ea:ClassName
- -ea ClassName
- -assert ClassName
- -enable ClassName
42. What will happen if you use assertions in Java 1.3 without compatibility mode?
- Runtime exception
- Compilation error
- Warning message
- No effect
43. Which of these correctly checks if a list is not null and not empty using assertion?
- assert list != null && list.size() > 0;
- assert list != null || list.size() > 0;
- assert list != null : "List is empty";
- assert list.size() > 0;
44. What is the main advantage of using assertions over System.out.println for debugging?
- They execute faster
- They provide better error messages
- They can be disabled without code changes
- They work in all Java versions
45. Which Java version first introduced assertions?
- Java 1.2
- Java 1.3
- Java 1.4
- Java 5.0