This is the java programming questions and answers section on "java.io Package" 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 packages contain classes and interfaces used for input & output operations of a program?
- A. java.util
- B. java.lang
- C. java.io
- D. All of the mentioned
Answer: Option C
Explanation:
java.io provides support for input and output operations.
2. Which of these class is not a member class of java.io package?
- A. String
- B. StringReader
- C. Writer
- D. File
Answer: Option A
Explanation:
String
3. Which of these interface is not a member of java.io package?
- A. DataInput
- B. ObjectInput
- C. ObjectFilter
- D. FileFilter
Answer: Option C
Explanation:
ObjectFilter
4. Which of these class is not related to input and output stream in terms of functioning?
- A. File
- B. Writer
- C. InputStream
- D. Reader
Answer: Option A
Explanation:
A File describes properties of a file, a File object is used to obtain or manipulate the information associated with a disk file, such as the permissions, time date, and directories path, and to navigate subdirectories.
5. Which of these is specified by a File object?
- A. a file in disk
- B. directory path
- C. directory in disk
- D. None of the mentioned
Answer: Option C
Explanation:
directory in disk
