The assert keyword in Java is used to perform debugging checks during development. It tests assumptions made by the programmer, and if an assertion fails, the program throws an AssertionError. Assertions are typically disabled by default and must be enabled explicitly at runtime.
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What is the purpose of the assert keyword in Java?
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Question 2 of 15
2. Question
What is thrown when an assertion fails?
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Question 3 of 15
3. Question
Which of the following enables assertions during execution?
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Question 4 of 15
4. Question
What is the correct syntax for an assert statement?
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Question 5 of 15
5. Question
Which type of error is AssertionError?
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Question 6 of 15
6. Question
When should assertions be used?
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Question 7 of 15
7. Question
Which of the following is not a valid use of assert?
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Question 8 of 15
8. Question
What happens if assertions are not enabled and an assertion fails?
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Question 9 of 15
9. Question
Can assertions be used for validating public method arguments?
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Question 10 of 15
10. Question
In which Java version was assert introduced?
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Question 11 of 15
11. Question
What is the output of the following?
int a = 5; assert a > 10 : “a is too small”; System.out.println(“Done”);
Assume assertions are enabled.
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Question 12 of 15
12. Question
Can we catch an AssertionError using try-catch?
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Question 13 of 15
13. Question
What is the default behavior of the JVM regarding assertions?
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Question 14 of 15
14. Question
Are assertions checked at compile-time?
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Question 15 of 15
15. Question
Can assert be used inside static blocks or methods?
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Summary
The assert keyword in Java is a powerful debugging tool used to test assumptions within code during development. It throws an AssertionError if the condition fails, but does not replace proper exception handling. Assertions are disabled by default and should never be used for validating user input or production-level checks.
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