This is the java programming questions and answers section on "Packages" with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand.
1. Which of these keywords is used to define packages in Java?
Answer: Option C
Explanation:
package
2. Which of these is a mechanism for naming and visibility control of a class and its content?
- A. Object
- B. Packages
- C. Interfaces
- D. None of the Mentioned.
Answer: Option B
Explanation:
Packages are both naming and visibility control mechanism. We can define a class inside a package which is not accessible by code outside the package.
3. Which of this access specifies can be used for a class so that its members can be accessed by a different class in the same package?
- A. Public
- B. Protected
- C. No Modifier
- D. All of the mentioned
Answer: Option D
Explanation:
Either we can use public, protected or we can name the class without any specifier.
4. Which of these access specifiers can be used for a class so that it’s members can be accessed by a different class in the different package?
- A. Public
- B. Protected
- C. Private
- D. No Modifier
Answer: Option A
Explanation:
Public
5. Which of the following is correct way of importing an entire package ‘pkg’?
- A. import pkg.
- B. Import pkg.
- C. import pkg.*
- D. Import pkg.*
Answer: Option C
Explanation:
Operator * is used to import the entire package.
