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Input Output -Java Programming MCQ Questions and Answers

Learn competitive java programming mcq questions and answers on Input Output with easy and logical explanations. Page-4 section-1

31
System class is defined in .................
Discuss
Answer & Solution
Answer: Option B
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32 
try{
      File f = new File("a.txt");
}catch(Exception e){
}catch(IOException io){
}

Is this code create new file name a.txt ?
Discuss
Answer & Solution
Answer: Option C
Solution:

IOException is unreachable to compiler because all exception are going to catch up by Exception block.

33
Which of these classes defined in java.io and used for file-handling are abstract?
A. InputStream
B. PrintStream
C. Reader
D. FileInputStream
E. FileWriter
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Answer & Solution
Answer: Option C
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34
When comparing java.io.BufferedWriter and java.io.FileWriter, which capability exist as a method in only one of two ?
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Answer & Solution
Answer: Option D
Solution:

A newLine() method is provided in BufferedWriter which is not in FileWriter.

35
What does AWT stands for?
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Answer & Solution
Answer: Option C
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36
Which of these is used to perform all input & output operations in Java?
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Answer & Solution
Answer: Option A
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37
Which of these is a type of stream in Java?
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Answer & Solution
Answer: Option C
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38
Which of these classes are used by Byte streams for input and output operation?
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Answer & Solution
Answer: Option A
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39
Which of these classes are used by character streams for input and output operations?
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Answer & Solution
Answer: Option B
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40
Which of these class is used to read from byte array?
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Answer & Solution
Answer: Option D
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