Students, it’s time to reveal the hint of programming in java NPTEL week 7 assignment answers. And, identify where you can improve your marks in this assignment.
NPTEL Programming In Java Week 7 Assignment Answers
Q1. Which of these is method for testing whether the specified element is a file or a directory?
a. IsFile()
b. isFile()
c. Isfile()
d. isfile()
Answer: b. isFile()
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Q2. Which of the following is/are NOT Standard Stream(s)?
a. System.in
b. System.out
c. System.err
d. System.console
Answer: d. System.console
Q3. What will be the output of the Java code?
import java.io.*;
public class question
{
public static void main(String args[])
{
File obj = new File(" NPTEL/JULY/2022");
System.out.print (obj.getName());
}
}a. NPTEL
b. NPTEL/JULY/2022
c. /NPTEL/JULY/2022
d. 2022
Answer: d. 2022
Q4. What will be the output if the below program is executed?
import java.io.*;
public class Question {
public static void main(String[] args)
{
try {
PrintWriter writer = new PrintWriter(System.out);
writer.write("10"+ 6);
writer.close();
}
catch (Exception e) {
System.out.println(e);
}
}
}a. It will give compile-time error
b. It will give run-time error
c. j
d. 106
Answer: d. 106
Q5. Which method is used to write a byte to the current output stream?
a. public void write(int b) throws IOException
b. public void write(byte[] b) throws IOException
c. public void flush()throws IOException
d. public void close() throws IOException
Answer: a. public void write(int b) throws IOException
Q6. Which method of RandomAccessFile class reads a line from the file and returns it as aString?
a. WriteInt().
b. readLine()
c. readInt()
d. WriteDouble()
Answer: b. readLine()
Q7. Which of these class is not a member class of java.io package?
a. File
b. PrintStream
c. StringReader
d. Stream
Answer: d. Stream
Q8. Which of the following is/are interface(s) of java.io package?
a. FileReader
b. FileWriter
c. DataOutput
d. DataInput
Answer: c. DataOutput
d. DataInput
Q9. In which Java APIs the classes for handling all IO-streams are defined?
a. java.lang
b. java.util
c. java.io
d. java.awt
Answer: c. java.io
Q10. Consider the following program.
import java.io.*;
public class FileInfo {
public static void main(String args[]) {
File f = new File ("nptel.txt");
System.out.println("length: "+f.length());
}
}The file nptel.txt when browse with the Notepad text editor. it shows the content, which is shown below.
__________________________nptel.txt__________________________
HELLO
____________________________________________________________
If the program is executed, then what will be the output from the execution?
a. length: 6
b. length: 5
c. length: 0
d. length: 1
Answer: b. length: 5
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