Java MCQ Quiz ( Part -7 ) | infoStud blogs

Following quiz provides Multiple Choice Questions (MCQs) related to Core Java. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz

1. Which value is assigned to a reference value to show that there is no object?

1. zero
2. “”
3. void
4. 0

2. What happens to an object that no longer has reference variables that reference it?

1. It remains in main memory forever.
2. It is swapped out to the hard disk.
3. The garbage collection service exposes the memory it occupies to other objects.
4. It comes in the dumpster.

3. If an operator like “+” has more meaning depending on the context, is it called?

1. overloading
2. overload
3. Revise
4. oversize cargo

4. What is the name of an object that can not be changed after creation?

1. unalterable
2. forever
3. invariable
4. incomprehensible.

5. What is a current parameter?

1. The value passed to a method by the caller.
2. The identifier used in a method instead of the value passed to this method by the caller.
3. A variable used to control a counting loop.
4. The value returned by a method.

6. What is another name for object creation?

1. insubordination
2. initialization
3. instantiation
4. heredity

7. Which type of parameter passing is used in Java?

1. Call-by-value.
2. Call-By-Object.
3. Call-By-parameters.
4. Call-By-Waiting.

8. Will there be any effect on the caller when a method assigns a new value to a primitive parameter?

1. No, because all methods have a copy of the value of the caller.
2. No, as the method is not allowed to change the value of any parameter.
3. Yes, the change will affect the corresponding value of the caller.
4. Yes, because the method and its caller share the same memory section.

9. Does it have any effect on the caller when a method assigns a new object to an object reference parameter?

1. No, as this does not affect any objects that the caller can reference.
2. No, because this is not a legal operation.
3. Yes, because now the caller can reference the new object.
4. Yes, because the new object will replace one of the caller’s objects.

10. Does it have any effect on the caller if a method assigns a new value to an object element that it can access through an object reference parameter?

1. No, since she only has one copy of the object.
2. No, as it is not allowed to do that.
3. Yes, this will change the part of the object that both the method and the caller reference.
4. Yes, the caller will now get a new object.