BACHELOR OF COMPUTER APPLICATIONS (BCA) (Revised …

1 BACHELOR OF COMPUTER . APPLICATIONS . (BCA). (Revised Syllabus). BCA (Revised Syllabus)/ASSIGN/SEMESTER-IV. ASSIGNMENTS. (July 2021 & January - 2022). (BCS-040, MCS-024, BCS-041, BCS-042, MCSL-016, BCSL-043, BCSL-044, BCSL-045). SCHOOL OF COMPUTER AND INFORMATION SCIENCES. INDIRA GANDHI NATIONAL OPEN UNIVERSITY. MAIDAN GARHI, NEW DELHI 110 068. 1. CONTENTS. Course assignment No. Submission-Schedule Page Code No. For July- For January- June Session December Session BCS-040 BCA(4)/040/ assignment /21-22 31st October, 2021 15th April, 2022 3. MCS-024 BCA(4)/024/ assignment /21-22 31st October, 2021 15th April, 2022 5. BCS-041 BCA(4)/041/ assignment /21-22 31st October, 2021 15th April, 2022 6. BCS-042 BCA(4)/042/ assignment /21-22 31st October, 2021 15th April, 2022 8.

2 MCSL-016 BCA(4)/L-016/ assignment /21-22 31st October, 2021 15th April, 2022 10. BCSL-043 BCA(4)/L-043/ assignment /21-22 31st October, 2021 15th April, 2022 12. BCSL-044 BCA(4)/L-044/ assignment /21-22 31st October, 2021 15th April, 2022 13. BCSL-045 BCA(4)/L-045/ assignment /21-22 31st October, 2021 15th April, 2022 16. Important Notes 1. Submit your assignments to the Coordinator of your Study Centre on or before the due date. 2. assignment submission before due dates is compulsory to become eligible for appearing in corresponding Term End Examinations. For further details, please refer to BCA. Programme Guide. 3. To become eligible for appearing the Term End Practical Examination for the lab courses, it is essential to fulfill the minimum attendance requirements as well as submission of assignments (on or before the due date).

3 For further details, please refer to the BCA. Programme Guide. 2. Course Code : BCS-040. Course Title : Statistical Techniques assignment Number : BCA(4)040/ assignment /2021-22. Maximum Marks : 100. Weightage : 25%. Last Date of Submission : 31st October, 2021 (for July session). 15th April, 2022(for January session). Note: This assignment has 8 questions of 80 marks (each question carries equal marks). Answer all the questions. Rest 20 marks are for viva voce. You may use illustrations and diagrams to enhance explanations. Please go through the guidelines regarding assignments given in the Programme Guide for the format of presentation. Q1: Given the following sample of 20 numbers: (10 Marks). 15 45 52 43 50 59 41 47 56 79 72 18 45 54 78 12 41 48 58 14.

4 (a) Compute mean, variance and standard deviation. (b) If the largest value in the above set of numbers is changed to 500, to what extent are the mean and variance affected by the change? Justify your answer. Q2: a) What are the various probability distributions, give respective formulas of each type of distribution. Now Solve the problem The probability that at least one of the two independent events occurs is Probability that the first event occurs but not the second is 3/25. Also the probability that the second event occurs but not the first is 8/25. Find the probability that none of the two events occurs. (5 Marks). b) Which Probability distribution is applicable to the situation given below, give reasons in support of our response.

5 Calls at a telephone switchboard occur at an average rate of 6 calls per 10 minutes. Suppose the operator leaves for a 5-minute coffee break. What is the probability that exactly two calls occur while the operator is away? (5 Marks). Q3: Two new types of petrol, called premium and super, are introduced in the market, and their manufacturers claim that they give extra mileage. Following data were obtained on extra mileage which is defined as actual mileage minus 10. (10 Marks). Ordinary Petrol 1 2 2 1. Premium Petrol 2 2 1 3. Super Petrol 4 1 2 3. 3. Using the above data perform the following: (i) Using ANOVA, test whether premium or super gives an extra mileage. (ii) What is your estimate for the error variance? Q4: A Statistics professor has given five tests.

6 A student scored 70, 75, 65, 80 and 95. respectively in the five tests. The professor decides to determine his grade by randomly selecting a sample of 3 test scores. Construct the sampling distribution for this process. (10 Marks). Q5: Following data are given for marks of a student in subject A and B in a certain examination: (10 Marks). SUBJECT A SUBJECT B. MEAN MARKS 36 85. STANDARD DEVIATION 11 8. If coefficient of correlation between A and B marks of subject = , then perform the following;. i) Determine the two equations of regression ii) Calculate the expected marks in A corresponding to 75 marks obtained in B. Q6: Construct 5- yearly moving averages from the following data (10 Marks). YEAR 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012.

7 SALE 105 107 109 112 114 116 118 121 123 124 125 127 129. Q7: Which Probability distribution is applicable to the situation given below, give reasons in support of our response. In 120 throws of a single dice, following distribution of faces was observed. (10 Marks). FACES 1 2 3 4 5 6 TOTAL. F0 30 25 18 10 22 15 120. From the given data, verify that the hypothesis dice is biased is acceptable or not. Q8: Write Short Notes on following . (10 Marks). a) Linear systematic sampling b) Time series Analysis c) Forecasting d) CHI - SQUARE distribution e) Goodness of Fit Test 4. Course Code : MCS-024. Course Title : Object Oriented Technologies and Java Programming assignment Number : BCA (4)/024/ assignment /2021-22. Maximum Marks : 100. Last Date of Submission : 31st October, 2021 (for July session).

8 15th April, 2022 (for January session). There are eight questions in this assignment which carried 80 marks. Rest 20 marks are for viva-voce. Answer all the questions. Give appropriate comments in programs to increase understandability. Wherever required, you may write java program, run it on machine and take its output as part of solution. Please go through the guidelines regarding assignments given in the Program Guide for the format of presentation. Question 1: (a) Explain basic concepts of Object Oriented Programming? Explain how data hiding is achieved in java. (5 Marks). (b) Explain different data types available in java. (5 Marks). Question 2: (a) Explain how class is defined in java with the help of a program. Also explain use of getter and setter methods.

9 (4 Marks). (b) Explain use of static methods in java. (2 Marks). (c) Write a java program to add two matrices of 4X4 in java. (4 Marks). Question 3: Write a java program to create an Account class and define constructors in it. Inherit Saving_Bank_Accountclass andCurrent_Bank_Account class from the Account class. Override constructors of Account class in Saving_Bank_Account and Current_Bank_Account classes. Define appropriate methods to operate these accounts. Make necessary assumptions . Give proper comment in your program to increase redability. (10 Marks). Question 4: (a) Explain uses of final and super keywords in java with the help of examples. (4 Marks). (b) What is a package in Java? Explain accessibility rules for packages. (4 Marks).

10 (c) Explain advantages of polymorphism with the help of example. (2 Marks). 5. Question 5: (a) What is interface? Explain difference between abstract class and interface with the help of examples. Also write advantages of using interfaces in java programming. (6 Marks). (b) What is an exception? Explain various causes of exceptions. With the help of a program explain how exceptions are handled in java. (4 Marks). Question 6: (a) What is multithreading? Explain how threads are synchronized in java. Also explain various APPLICATIONS where multithreading may be used. Describe how interthread communications takes place in java. (8 Marks). (b) Create an Applet to draw circle on the basis of input given by user. (2 Marks). Question 7: (a) What is object serialization?