Objective-wise Tests – IO and NIO – 2025

Q1. What will the following code fragment print?

Path p1 = Paths.get("photos\\..\\beaches\\.\\calangute\\a.txt");
Path p2 = p1.normalize();
Path p3 = p1.relativize(p2);
Path p4 = p2.relativize(p1);

System.out.println(
p1.getNameCount()+" "+p2.getNameCount()+" "+
p3.getNameCount()+" "+p4.getNameCount());

Select 1 option(s):

Q2. Identify correct statements regarding System.in.

Select 2 option(s):

Q3. What will the following code print when run?

import java.io.Reader;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class MarkTest {

public static void main(String[] args) {

try (Reader r = new BufferedReader(new FileReader("c:\\temp\\test.txt"))) {
if (r.markSupported()) {
BufferedReader in = (BufferedReader) r;
System.out.print(in.readLine());
in.mark(100);
System.out.print(in.readLine());
System.out.print(in.readLine());
in.reset();
System.out.print(in.readLine());
in.reset();
System.out.println(in.readLine());
}else{
System.out.println("Mark Not Supported");
}
} catch (IOException e) {
e.printStackTrace();
}
}
}

Assume that the file test.txt contains:
A
B
C
D
E

Select 1 option(s):

Q4. How many methods have to be provided by a class that is not abstract and that says it implements Serializable interface?

Select 1 option(s):

Q5. Consider the following code:

class Bond
{
String ticker; double coupon; java.time.LocalDate maturity;
}

class Portfolio implements Serializable
{
String accountName;
Bond[] bonds;
}

public class TestClass {
public static void main(String[] args) throws Exception{
Portfolio portfolio = // get portfolio somehow
// serialize portfolio
}
}

Which of the following approaches can be taken independent of each other so that a Portfolio object can be serialized while preserving the state of the Bond objects contained in Portfolio?

Select 2 option(s):

Q6. What will the following code print when run?

import java.nio.file.Path;
import java.nio.file.Paths;

public class PathTest {
static Path p1 = Paths.get("c:\\finance\\data\\reports\\daily\\pnl.txt");

public static void main(String[] args) {
System.out.println(p1.subpath(0, 2));
}
}

Select 1 option(s):

Q7. Given:

public static void reader(String fileName1) throws Exception{
try (var fr = new FileReader(fileName1);) {
int charRead = 0;
while ((charRead = fr.read()) != -1) {
System.out.println("Read char " + charRead);
}
}
}

What can be done to the above code to make it read Strings instead of chars?

Select 1 option(s):

Q8. Given:

public static void createFile(String name) throws Exception{
try (
OutputStream os = new FileOutputStream(name); ) {

//INSERT CODE HERE

//flush and close the streams that are open
}

}

Which of the following combinations of the lines of code and their outcome when inserted above, are correct?

Select 2 option(s):

Q9. Given the following code fragment:

var raf = new RandomAccessFile("c:\\temp\\test.txt", "rwd");

//INSERT CODE HERE

raf.close();

var dis = new DataInputStream(new FileInputStream("c:\\temp\\test.txt"));
String value = dis.readUTF();
System.out.print(value);
dis.close();

Which of the following options can be inserted in the above code so that it will print hello world?

Select 1 option(s):