Advanced Java Questions & Answers – Reflection API

This set of Advanced Java Multiple Choice Questions & Answers (MCQs) focuses on “Reflection API”.

1. What are the components of a marker interface?
a) Fields and methods
b) No fields, only methods
c) Fields, no methods
d) No fields, No methods
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2. Which of the following is not a marker interface?
a) Serializable
b) Cloneable
c) Remote
d) Reader
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3. What is not the advantage of Reflection?
a) Examine a class’s field and method at runtime
b) Construct an object for a class at runtime
c) Examine a class’s field at compile time
d) Examine an object’s class at runtime
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4. How private method can be called using reflection?
a) getDeclaredFields
b) getDeclaredMethods
c) getMethods
d) getFields
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5. How private field can be called using reflection?
a) getDeclaredFields
b) getDeclaredMethods
c) getMethods
d) getFields
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6. What is used to get class name in reflection?
a) getClass().getName()
b) getClass().getFields()
c) getClass().getDeclaredFields()
d) new getClass()
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7. How method can be invoked on unknown object?
a) obj.getClass().getDeclaredMethod()
b) obj.getClass().getDeclaredField()
c) obj.getClass().getMethod()
d) obj.getClass().getObject()
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8. How to get the class object of associated class using Reflection?
a) Class.forName(“className”)
b) Class.name(“className”)
c) className.getClass()
d) className.getClassName()
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9. What does Class.forName(“myreflection.Foo”).getInstance() return?
a) An array of Foo objects
b) class object of Foo
c) Calls the getInstance() method of Foo class
d) Foo object
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10. What does foo.getClass().getMethod(“doSomething”, null) return?
a) doSomething method instance
b) Method is returned and we can call the method as method.invoke(foo,null);
c) Class object
d) Exception is thrown
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Sanfoundry Global Education & Learning Series – Java Programming Language.

To practice all areas of Java language, here is complete set of 1000+ Multiple Choice Questions and Answers.