Programming in Java Nptel Week 6 Assignment Answers
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3. What is the output of the following program? a. 1 b. 2 c. 0 d. Compilation Error
Answer : c. 0
4. Which exception is thrown when an array element is accessed beyond the array size? a. ArrayElementOutOfBounds b. ArrayIndexOutOfBoundsException c. ArrayIndexOutOfBounds d. None of these
9. For the program given below, what will be the output after its execution?
a. 1 b. 2 c. 0 d. 01
Answer: a. 1
10.Which of the following method returns a reference to the currently executing thread object? a. public static boolean interrupted(); b. public static Thread currentThread(); c. public final boolean isAlive(); d. public final void suspend();
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These are NPTEL Programming In Java Week 6 Assignment Answers
Q1. What is the output of the following program? a. “Programming In Java” b. Run time error c. Compile time error d. ArithmeticException
Answer: c. Compile time errorc. Compile time error
Q2. What is the output of the following program? a. 1 3 b. 1 2 3 4 c. Runtime error d. 1 2
Answer: a. 1 3
Q3. For the program given below, what will be the output after its execution? a. 0 b. true c. 1 d. false
Answer: c. 1
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These are NPTEL Programming In Java Week 6 Assignment Answers
Q4. Which of the following is a correct constructor for a thread object? a. Thread(Runnable a, String str); b. Thread(Runnable a, int priority); c. Thread(Runnable a, ThreadGroup t); d. Thread(int priority);
Answer: a. Thread(Runnable a, String str);
Q5. What is the output of the following program? a. Compiler Error b. “Running” c. Runtime Exception d. No output, but no error
Answer: b. “Running”
Q6. How many threads does the following program run on? a. 0 b. 1 c. 2 d. 3
Answer: c. 2
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These are NPTEL Programming In Java Week 6 Assignment Answers
Q7. In the following java program, what is the NAME of the thread? a. thread b. main c. system d. None of the above
Answer: b. main
Q8. Which of the following line(s) of code is suitable to START a thread at #1? a. Thread t = new Thread(Nptel); b. Thread t = new Thread(Nptel); t.start(); c. Nptel run = new Nptel(); Thread t = new Thread(run); t.start(); d. Thread t = new Thread(); Nptel.run();
Answer: c. Nptel run = new Nptel(); Thread t = new Thread(run); t.start();
Q9. What is the name of the priority of this Thread in this program? a. 1 b. 4 c. 0 d. 5
Q10. What does I/O stand for in Java? a. Input/Output b. Inheritance/Overriding c. Integer/Object d. Iteration/Observation
Answer: a. Input/Output
These are NPTEL Programming In Java Week 6 Assignment Answers
Programming Assignment
Question 1 Complete the code fragment to read two integer inputs from keyboard and find the quotient and remainder.
Solution:
int quotient = x / y;
int remainder = x % y;
System.out.println("The Quotient is = " + quotient);
System.out.print("The Remainder is = " + remainder);
These are NPTEL Programming In Java Week 6 Assignment Answers
Question 2 Complete the code segment to count number of digits in an integer using while loop.
Solution:
int count = 0;
while (num != 0){
num = num / 10;
count++;
}
System.out.print(count);
These are NPTEL Programming In Java Week 6 Assignment Answers
Question 3 Complete the code segment to display the factors of a number n.
Solution:
for (int i = 1; i <= num; i++){
if (num % i == 0){
System.out.print(i + " ");
}
}
These are NPTEL Programming In Java Week 6 Assignment Answers
Question 4 Complete the code segment to find the standard deviation of the 1-D array. Use the following formula: σ=√(1/N∑N to i=1(Xi−μ)2) Here, σ = Population standard deviation N = Number of observations in the population Xi = ith observation in the population μ = Population mean
Solution:
for (int i = 0; i < arr.length; i++){
sum += arr[i];
}
mean=sum/arr.length;
for (int i = 0; i < arr.length; i++){
sq += Math.pow((arr[i] - mean), 2);
}
res = Math.sqrt(sq / arr.length);
These are NPTEL Programming In Java Week 6 Assignment Answers
Question 5 Write a program which will print a pattern of “*” ‘s of height “n”. For example: Input: n = 3 Output: *** ** * ** ***
Solution:
for (int i = n; i >= 1; i--){
for (int j = 1; j <= i; j++){
System.out.print("*");
}
System.out.println();
}
for (int i = 2; i <= n; i++){
for (int j = 1; j <= i; j++){
System.out.print("*");
}
System.out.println();
}
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These are NPTEL Programming In Java Week 6 Assignment Answers
These are Programming In Java Assignment 6 Answers
Programming Assignment
Question 1 Complete the code segment to print the following using the concept of extending the Thread class in Java: —————–OUTPUT——————- Thread is Running. ————————————————-
Solution:
// Write the appropriate code to extend the Thread class to complete the class Question61.
public class Question61 extends Thread{
public void run(){
System.out.print("Thread is Running.");
}
Question 2 In the following program, a thread class Question62 is created using the Runnable interface Complete the main() to create a thread object of the class Question62 and run the thread. It should print the output as given below. —————–OUTPUT——————- Welcome to Java Week 6 New Question. Main Thread has ended. ————————————————-
// Create main() method and appropriate statements in it
public static void main(String[] args)
{
Question62 ex = new Question62();
Thread t1= new Thread(ex);
t1.setName("Main Thread");
t1.start();
System.out.println("Welcome to Java Week 6 New Question.");
t1.setName("Main Thread");
}
These are Programming In Java Assignment 6 Answers
Question 3 A part of the Java program is given, which can be completed in many ways, for example using the concept of thread, etc. Follow the given code and complete the program so that your program prints the message “NPTEL Java week-6 new Assignment Q3”. Your program should utilize the given interface/ class.
Solution:
// Class MyThread is defined which extends class B
class MyThread extends B {
// run() is overriden and 'NPTEL Java' is printed.
public void run() {
System.out.print("NPTEL Java week-6 new Assignment Q3");
}
}
Question 4 Execution of two or more threads occurs in a random order. The keyword ‘synchronized’ in Java is used to control the execution of thread in a strict sequence. In the following, the program is expected to print the output as given below. Do the necessary use of ‘synchronized’ keyword, so that, the program prints the Final sum as given below: —————–OUTPUT——————- Final sum:6000 ————————————————-
// Returns the sum of a and b. (reader)
// Should always return an even number.
public synchronized int sum() {
return(a+b);
}
// Increments both a and b. (writer)
public synchronized void inc() {
a++;
b++;
}
}
These are Programming In Java Assignment 6 Answers
Question 5 Given a snippet of code, add necessary codes to print the following: —————–OUTPUT——————- Name of thread ‘t1’:Thread-0 Name of thread ‘t2’:Thread-1 New name of thread ‘t1’:Week 6 Assignment Q5 New name of thread ‘t2’:Week 6 Assignment Q5 New ————————————————-
