• Placement Questions

Placement Papers with Solutions

(#M40167132) JAVA QUESTION Exceptions 2 Keep an EYE

class ProductNotFoundException extends Exception {

//Some code

}

class Shop {

public void findProduct(int productId) throws ProductNotFoundException {

//some code

throw new ProductNotFoundException();

//some code

}

}

class ABCShop{

public void findProductsList(){

new Shop().findProduct(101);

}

}

Which of the following statement(s) are true for the above code?

A. This code will compile if we add throws ProductNotFoundException in the signature of method findProductsList().
B. This code will compile but returns no output
C. This code will compile if we add a try-catch block in findProductsList().
D. This code will compile if in method findProductsList () returns a list instead of void

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(#M40167131) JAVA QUESTION Exceptions Keep an EYE

Observe the code.

public class Sample {

public static void main(String args[]) {

int i=10,j=0,k;

try {

k=i/j;

}

catch(Exception e) {

System.out.println("Exception");

}

catch(ArithmeticException e) {

System.out.println("Arithmetic exception");

}

}

}

Predict the output.

A. ArithmeticException
B. Compilation Fails
C. Exception
ArithmeticException
D. Runtime exception

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(#M40167130) JAVA QUESTION finally block Keep an EYE

finally block will get executed whether or not an exception occurs. State True or False

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(#M40167129) JAVA QUESTION try, catch and finally Keep an EYE

Which of the following statement(s) are not true?

A. For each try block there can be zero or more catch blocks but only one finally block
B. Finally block will get executed whether or not an exception occurs.
C. A try block must be followed only by at least one catch block
D. A try block has multiple catch block, then those exception handlers can be in any order

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(#M40167128) JAVA QUESTION Exceptions Keep an EYE

Exception is an abnormal event or error that occurs during ________

A. Runtime
B. Compile time
C. any time - unpredictable
D. Any of these options

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(#M40167127) JAVA QUESTION Checked vs Unchecked exceptions Keep an EYE

Which exceptions should be explicitly handled or properly propagated?

A. Unchecked exceptions
B. Checked exceptions
C. Errors
C. None of the above

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(#M40167126) JAVA QUESTION static import Keep an EYE

Identify the correct options from the classes provided below.
More than one may be correct.

A. import static edu.ABC.model.Account.*;
public class Loan {
public double getInterest() {
return INTEREST_RATE;
}
}

B. import static edu.ABC.model.Account ;
public class Loan {
public double getInterest() {
return INTEREST_RATE;
}
}

C. import edu.ABC.model.Account ;
public class Loan {
public double getInterest() {
return Account.INTEREST_RATE;
}
}

D. package edu.ABC.model;
public class Loan {
public double getInterest() {
return INTEREST_RATE;
}
}

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(#M40167125) JAVA QUESTION String objects Keep an EYE

What is special about string objects as compared to objects of other derived types?(More than 1 may be correct)

A. Java provides string constant pool to store the string objects
B. You can concatenate two string objects using ‘+’
C. You can create string objects without or without using new operator

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(#M40167124) JAVA QUESTION Is array column size mandatory? Keep an EYE

Column size is mandatory to create an array in java. State true or false

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(#M40167123) JAVA QUESTION StringBuilder vs StringBuffer Keep an EYE

class MyLogger
{
private StringBuilder logger = new StringBuilder();
public void log(String message, String user)
{
logger.append(message);
logger.append(user);
}
}

The programmer must guarantee that a single MyLogger object works properly for a multi threaded system. How must this code be changed to be thread-safe?

A. Replace StringBuilder with StringBuffer

B. Replace StringBuilder with just a String object and use the string concatenation (+=) within the log method.

C. No change is necessary, the current MyLogger code is already thread-safe.

D. Synchronize the log method

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