nptel assignment 7 answers 2023

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NPTEL Programming in Java Week 7 Assignment Solution 2023

NPTEL Programming in Java Week 7 All Programming Assignment Solutions – Jan 2023 | Swayam. With the growth of Information and Communication Technology, there is a need to develop large and complex software.

Further, those software should be platform independent, Internet enabled, easy to modify, secure, and robust. To meet this requirement object-oriented paradigm has been developed and based on this paradigm the Java programming language emerges as the best programming environment.

Now, Java programming language is being used for mobile programming, Internet programming, and many other applications compatible to distributed systems.

This course aims to cover the essential topics of Java programming so that the participants can improve their skills to cope with the current demand of IT industries and solve many problems in their own filed of studies.

COURSE LAYOUT

• Week 1 : Overview of Object-Oriented Programming and Java
• Week 2 : Java Programming Elements
• Week 3 : Input-Output Handling in Java
• Week 4 : Encapsulation
• Week 5 : Inheritance
• Week 6 : Exception Handling
• Week 7 : Multithreaded Programming
• Week 8 : Java Applets and Servlets
• Week 9 : Java Swing and Abstract Windowing Toolkit (AWT)
• Week 10 : Networking with Java
• Week 11: Java Object Database Connectivity (ODBC)
• Week 12: Interface and Packages for Software Development

Course Name : “Programming in Java 2023”

Question : 1 A byte char array is initialized. You have to enter an index value” n “. According to index your program will print the byte and its corresponding char value. Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “ exception occur ” .If there is no such exception, it will print the required output.

Question : 2 The following program reads a string from the keyboard and is stored in the String variable “ s1 “. You have to complete the program so that it should should print the number of vowels in s1 . If your input data doesn’t have any vowel it will print “ 0 “.

Question : 3 A string “s1” is already initialized. You have to read the index “n”  from the keyboard.  Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “exception occur” .If there is no such exception, your program should replace the char “a” at the index value “n” of the “s1” ,then it will print the modified string.

Question : 4 Complete the following code fragment  to read three integer values from the keyboard and find the sum of the values.  Declare  a  variable  “sum” of type int and store the result in it.

Question : 5 Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “ Please enter valid data ” .If there is no such exception, it will print the “ square of the number “.

Nptel Data Science For Engineers Assignment 7 Answers 2023

NPTEL Data Science for Engineers Assignment 7 Answers 2023 !  In this article we will discuss about the answers for Week 6 assignment of Data science for Engineers. Consider these answers as reference only. I am confident in providing these answers. Then Come with us until the last of page to know more about week 7 Assignment. 

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NPTEL also conducts certification exams for its courses, which are recognized by many industries and academic institutions. These exams are conducted online and provide a valuable credential for individuals seeking career advancement or further education.

Nptel Data Science For Engineers Assignment 7 Answers 2023  

You can find the answers for Data Science for Engineers Assignment 7 Answers 2023 below

b.  Predicting whether a patient is diagnosed with a disease or not.

On the other hand, predicting the average rainfall in a given month, predicting the price of a house, and predicting whether it will rain or not tomorrow are examples of regression problems, where the goal is to predict a continuous output variable.

In the glm() function, the family parameter is used to specify the distributional family of the response variable. For a variable with binary output (i.e., 0 or 1), the appropriate distributional family for logistic regression is the binomial distribution.

Load the dataset iris.csv as a dataframe irisdata, with the first column as index headers, first row as column headers, dependent variable as factor variable, and answer the following questions.

Q7.  What can you comment on the distribution of the independent variables in the dataframe?

          We can see that the table is not empty. It is filled with all values.

     lapply(iris_csv_iris[, 3:4], mean) $SepalWidth [1] 3.057333 $PetalLength [1] 3.758{codeBox} 

       Error in match.fun(FUN) : '2' is not a function, character or symbol {codeBox}

 SepalWidth PetalLength     3.057333    3.758000 {codeBox}

               apply(iris_csv_iris[, 3:4], 1, mean)   [1] 2.45 2.20 2.25 2.30 2.50 2.80 2.40 2.45 2.15 2.30 2.60 2.50 2.20 2.05 2.60 2.95 2.60 2.45  [19] 2.75 2.65 2.55 2.60 2.30 2.50 2.65 2.30 2.50 2.50 2.40 2.40 2.35 2.45 2.80 2.80 2.30 2.20  [37] 2.40 2.50 2.15 2.45 2.40 1.80 2.25 2.55 2.85 2.20 2.70 2.30 2.60 2.35 3.95 3.85 4.00 3.15  [55] 3.70 3.65 4.00 2.85 3.75 3.30 2.75 3.60 3.10 3.80 3.25 3.75 3.75 3.40 3.35 3.20 4.00 3.40  [73] 3.70 3.75 3.60 3.70 3.80 4.00 3.70 3.05 3.10 3.05 3.30 3.90 3.75 3.95 3.90 3.35 3.55 3.25  [91] 3.50 3.80 3.30 2.80 3.45 3.60 3.55 3.60 2.75 3.45 4.65 3.90 4.45 4.25 4.40 4.80 3.50 4.60 [109] 4.15 4.85 4.15 4.00 4.25 3.75 3.95 4.25 4.25 5.25 4.75 3.60 4.45 3.85 4.75 3.80 4.50 4.60 [127] 3.80 3.95 4.20 4.40 4.45 5.10 4.20 3.95 4.10 4.55 4.50 4.30 3.90 4.25 4.35 4.10 3.90 4.55 [145] 4.50 4.10 3.75 4.10 4.40 4.05 {codeBox}

 a. Sepal widths of Versicolor flowers are lesser than 3 cm.

 d. Sepals of Setosa flowers are relatively more wider than Versicolor flowers

Conclusion:

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Programming in Java | Week 7

Session: JAN-APR 2024

Course name: Programming In Java

Course Link: Click Here

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These are NPTEL Programming In Java Week 7 Assignment 7 Answers

Q1. Which stream does Java application uses to read data from a source, it may be a file, an array, peripheral device or socket? a. InputStream b. OutputStream c. Input/OutputStream d. None of the above

Answer: a. InputStream

Q2. What is the primary purpose of input streams in Java? a. To write data to a file. b. To read data from a file. c. To append data to a file. d. To create directories.

Answer: b. To read data from a file.

Q3. Which class in Java is used to create a new directory? a. FileReader b. FileWriter c. File d. Directory

Answer: c. File

Q4. Which class in Java is used to read data line by line from a file? a. BufferedReader b. FileInputStream c. FileWriter d. OutputStream

Answer: a. BufferedReader

Q5. What does the following code do? FileInputStream fis = new FileInputStream(“test.dat”);

a. It creates a new file named test.dat if it does not exist and opens the file so you can write to it, if write permission is available. b. It thows an error if the file named test.dat does not exist and opens the file, if it exists, so you can read from it and write into it, if write permission is available.

c. It creates a new file named test.dat regardless of whether it exists or not and opens the file so you can write to it, if write permission is available. d. It creates a new file named test.dat regardless of whether it exists or not and opens the file so you can read from it and write to it, if write permission is available.

Answer: b. It thows an error if the file named test.dat does not exist and opens the file, if it exists, so you can read from it and write into it, if write permission is available.

Q6. What is the output of this program? (Assume ‘inputoutput.java’ file exists in the current directory) a. true b. false c. prints number of bytes in file d. prints number of characters in the file

Answer: c. prints number of bytes in file

Q7. What will be the output of the following Java program? a. abc b. abcd c. abcde d. none of the mentioned

Answer: d. none of the mentioned

Q8. What is the output of the following Java program? a. 30 b. Compiler Error c. Garbage value d. 0

Answer: b. Compiler Error

Q9. In order to restrict a variable of a class from inheriting to subclass, how variable should be declared? a. Protected b. Private c. Public d. Static

Answer: b. Private

Q10. A _________ is a type of object that organizes components in a container. a. Event adapter b. Event Handler c. Layout manager d. Grid Manager

Answer: c. Layout manager

Programming Assignment

Question 1 A Student class with private fields (name, age) is provided, Your task is to make the following: a parameterized constructor to initialize the private fields the getter/setter methods for each field Follow the naming convention as given in the main method of the suffix code.

Question 2 A BankAccount class with private field balance is provided, Your task is to make the following: a parameterized constructor to initialize the private field public void deposit(…) // to deposit money public void withdraw(…) // to withdraw money, should print “Insufficient funds!” if not enough money to withdraw public double getBalance() // to return the current balance Follow the naming convention as given in the main method of the suffix code.

Question 3 An abstract class shape is provided, Your task is to make the following: a parameterized constructor to initialize the Circle class @Override the area function to compute the area of a circle (Use Math.PI for value of pi, not 22/7) @Override the displayInfo() function to print exactly in the format provided by the test cases. Follow the naming convention as given in the main method of the suffix code.

Question 4 An interface shape is provided, Your task is to make the following: Create a class “Circle” that implements the “Shape” interface and provides its own implementation for calculateArea(). @Override the area function to compute the area of a circle (Use Math.PI for value of pi, not 22/7) Create another class “Rectangle” that implements the “Shape” interface and provides its own implementation for calculateArea(). @Override the area function to compute the area of a rectangle Follow the naming convention as given in the main method of the suffix code.

Question 5 Two interfaces are provided, namely Flyable and Swimmable, Your task is to make the following: Create a class “FlyingFish” that implements both interfaces and provides its own implementation for fly() and swim() It should have a private variable name, use a constructor to set the value and the functions fly() and swim() to print exactly as given in the test case. Follow the naming convention as given in the main method of the suffix code.

More Weeks of Programming In Java: Click here

More Nptel Courses: https://progiez.com/nptel-assignment-answers

Session: JULY-DEC 2023

Course Name: Programming In Java

Question 1 Complete the following code fragment to read three integer values from the keyboard and find the sum of the values. Declare a variable “sum” of type int and store the result in it.

Question 2 Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “Please enter valid data” .If there is no such exception, it will print the “square of the number”.

Question 3 A byte char array is initialized. You have to enter an index value”n”. According to index your program will print the byte and its corresponding char value. Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “exception occur” .If there is no such exception, it will print the required output.

Question 4 The following program reads a string from the keyboard and is stored in the String variable “s1”. You have to complete the program so that it should should print the number of vowels in s1 . If your input data doesn’t have any vowel it will print “0”.

Question 5 A string “s1” is already initialized. You have to read the index “n” from the keyboard. Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “exception occur” .If there is no such exception, your program should replace the char “a” at the index value “n” of the “s1” ,then it will print the modified string.

More Nptel Courses: Click here

Session: JAN-APR 2023

Course Name: Programming in Java

Q1. Which of these is a type of IO stream in Java? a. Integer stream b. Short stream c. Byte stream d. Character stream

Answer: c, d

Q2. Which of the following is a class in java.io package? a. FileReader b. ObjectInput c. ObjectOutput d. Datalnput

Answer: a. FileReader

Q3. Consider the following program. What will be the output if the above program is executed? a. It will give compile-time error. b. B c. 66 d. r

Answer: d. r

Q4. Consider the following program. What is the output of the above code? a. java/programm/2023 b. java’programm/ c. java d. 2023

Answer: d. 2023

Q5. Which method is used to read b length bytes from the input stream into an array? a. public void read(int b)throws IOException { { b. public int read(byte[ ] b)throws IOException {} c. public void read(byte[ ] b)throws IOException {} d. public int read(int b)throws IOException {}

Answer: b. public int read(byte[ ] b)throws IOException {}

Q6. How many standard streams Java can support? a. 2 b. 3 c 4 d. 1

Answer: b. 3

Q7. Which of the following stream is different from others? a. System.in b. System.out c. PrintStream d. FileOutputStream

Answer: c. PrintStream

Q8. Which of the following is used to read a string from the input stream? a. get() b. readLine( ) c. getLine( ) d. read()

Answer: b. readLine( )

Q9. Which of the following class(es) can be used for handling files in Java? a. java files b. java.io.File c. java.io d. java Filehandling

Answer: b. java.io.File

Q10. Which of the following statement(s) is/are true? a. The default delimiters for a Scanner object are the white space characters. b. The Scanner class has instance methods for reading each of the Java primitive types except char. c. The Scanner methods do not throw any checked exceptions. d. The Scanner class can be found in the java.util package.

Answer: a, b, c, d

Programming Assignment of Programming in Java

A byte char array is initialized. You have to enter an index value”n”. According to index your program will print the byte and its corresponding char value. Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “exception occur” .If there is no such exception, it will print the required output.

The following program reads a string from the keyboard and is stored in the String variable “s1”. You have to complete the program so that it should should print the number of vowels in s1 . If your input data doesn’t have any vowel it will print “0”.

A string “s1” is already initialized. You have to read the index “n”  from the keyboard.  Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “exception occur” .If there is no such exception, your program should replace the char “a” at the index value “n” of the “s1” ,then it will print the modified string.

Complete the following code fragment to read three integer values from the keyboard and find the sum of the values. Declare a variable “sum” of type int and store the result in it.

Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “Please enter valid data” .If there is no such exception, it will print the “square of the number”.

More Weeks of Programming In Java: Click Here

Session: JULY-DEC 2022

Course Name: Programming in Java NPTEL

1) 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()

2) 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

3) What will be the output of the Java code? a. NPTEL b. NPTEL/JULY/2022 c. /NPTEL/JULY/2022 d. 2022

Answer: d. 2022

4) What will be the output if the above program is executed? a. It will give compile-time error b. It will give run-time error c. j d. 106

Answer: d. 106

5) 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: b. public void write(byte[] b)throws IOException

6) Which method of Random AccessFile class reads a line from the file and returns String ? a. WriteInt() b. readLine() c. readInt() d. WriteDouble()

Answer: b. readLine()

7) Which of these class is not a member class of java.io package? a. File b. PrintStream c. StringReader d. Stream

Answer: d. Stream

8) Which of the following is/are interface(s) of java.io package? a. FileReader b. File Writer c. DataOutput d. DataInput

9) 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

10) Consider the following program. 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

Programming Assignment Solutions

Question 1 Complete the following code fragment to read three integer values from the keyboard and find the sum of the values. Declare a variable “sum” of type int and store the result in it.

Question 2 Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “Please enter valid data” .If there is no such exception, it will print the “square of the number”.

Question 3 A byte char array is initialized. You have to enter an index value”n”. According to index your program will print the byte and its corresponding char value. Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “exception occur” .If there is no such exception, it will print the required output.

Question 4 The following program reads a string from the keyboard and is stored in the String variable “s1”. You have to complete the program so that it should should print the number of vowels in s1 . If your input data doesn’t have any vowel it will print “0”.

Question 5 A string “s1” is already initialized. You have to read the index “n”  from the keyboard. Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “exception occur” .If there is no such exception, your program should replace the char “a” at the index value “n” of the “s1” ,then it will print the modified string.

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NPTEL Software Testing Week 6 Assignment Answers 2024

1. Typically, how do logical constraints occur in pre-conditions and postconditions that specify assumptions on inputs to methods or describe the properties of the methods?

• The logical conditions can be any logical predicate.
• The logical conditions occur in conjunctive or disjunctive normal form.
• The logical conditions are a simple OR or AND combinations of two or more clauses.
• The logical conditions always describe what the methods should not process as inputs.

2. State true or false: It is desired that a logical predicate used in a decision statement be a tautology.

3. How do logical predicates occur in finite state machines?

• They occur as guards in the transitions of a finite state machine.
• They occur as predicates in the states of a finite state machine.
• They occur in the actions labeling the transitions of a finite state machine.
• They occur in the events of a finite state machine.

4. State true or false: The logical predicates occuring in the condition statements of a method are all simple propositional logic formulas.

Consider the following code that has two conditional statements and the corresponding two logical predicates. Answer the following questions with reference to logical coverage criteria on this code.

5. Which of the options below best describe what the above program computes?

• It computes the sum of all the numbers up to the limit l.
• It computes the sum of all the even numbers up to the limit l.
• It computes the sum of all the odd numbers up to the limit l.
• It computes the number of odd numbers up to the limit l.

6. How many clauses are there in the above program, per predicate?

• There are two predicates, each having one clause.
• There are two clauses in the program, to be considered as a part of the second predicate.
• There are four clauses in the program, two per predicate.
• There are l different clauses in the program, one for each iteration of the loop.

7. What does predicate coverage test for the second clause in the above program?

• It tests for the number being odd or even.
• It tests for the number being within or outside the limit.

8. What does the test case for predicate coverage evaluating to true for the first predicate mean in the above program?

• The first predicate evaluating to true indicates repeated iterations of the for loop.
• The first predicate evaluating to true indicates exit from the for loop.

9. State true or false: Clause coverage and predicate coverage are the same for both the predicates in the above program?

10. In the ith iteration of the for loop, which of the following represents the actual predicate corresponding to the if statement?

• The predicate in the ith iteration is s%2 == 1.
• The predicate in the ith iteration is (1 + i)%2 == 1.
• The predicate in the ith iteration is i%2 == 1.
• The predicate in the ith iteration is 1%2 == 1.

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