Languages-Java [3i Infotech Placement]: Sample Questions 48 - 49 of 141
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Question 48
Explanation
- “JAR” stands for java Archive.
- It is a file format based on the popular ZIP file format and used for aggregating many files into one.
- A JAR file is contains compressed version of class files, audio file, image files- as an aggregation of resources into a single, compressed file.
Question 49
Appeared in Year: 2004
Question MCQ▾
If this method is overridden in a sub class, ________
Choices
Choice (4) | |
---|---|
a. | The argument list of new method should exactly match that of overridden method |
b. | The return type of new method should exactly match that of overridden method |
c. | The new method can return any type of values |
d. | Both a. and b. are correct |
Answer
d.Explanation
- The overriding method has the same name, number and type of arguments, and return value as the method it overrides. (return type of a subclass can be a subclass of the return type of its superclass) .
- Overriding method can have different throws clause if it doesn՚t specify any types not specified by the throws clause in the overridden method.
- The access specifier for the overriding method can allow more but not less access than the overridden method. For example, a protected method in the superclass can be made public but not private.