Electronic Devices And Digital Circuits B.C.A Model Question Papers : alagappauniversity.ac.in

Name of the University : Alagappa University
Degree : B.C.A
Subject Code/Name : Electronic Devices And Digital Circuits
Document Type : Model Question Papers
Website : alagappauniversity.ac.in

Download Model/Sample Question Paper : May 2008 : www.pdfquestion.in/uploads/alagappauniversity.ac.in/4060.-B.C.A.(Upto2002).docx

Electronic Devices & Digital Circuits :

Time : Three hours
Maximum : 100 marks

Related : Alagappa University Lab-III Oracle And Visual Basic B.C.A Model Question Papers : www.pdfquestion.in/4123.html

1. (a) Convert the following binary numbers to decimal numbers (10)
(i) 00111
(ii) 11001
(iii) 10110
(iv) 11110

(b) Convert each of the following Hexa decimal numbers to binary number (10)
(i) FF
(ii) ABC
(iii) CD42
(iv) F329.

2. (a) Construct a three input NOR Gate and verify its truth table. (10)
(b) Construct a three input NAND Gate and verify its truth table. (10)
3. (a) Prove Demorgan’s first theorem using Logic Circuit and truth table. (10)
(b) Explain the commutative, Associative, and Distributive laws of boolean theorems. (10)
4. (a) Draw the circuit diagram of half adder, truth table and with the boolean expressions for sum and carry. (10)
(b) Draw the circuit diagram of full adder, truth table and write the boolean expressions. (10)

5. (a) Differentiate between R-S and J-K flip-flops. (10)
(b) With neat diagram Explain the shift-left register with an example. (10)
6. (a) Draw the circuit diagram of synchronous counter and state the advantages of its. (10)
(b) Draw the circuit diagram of Ring counter and why the circuit is called Ring counter. (10)
7. (a) Draw and explain the cross-section of an n-channel J-FET. (10)
(b) Draw and explain the cross-section of an n-channel MOSFET. (10)
8. (a) What is an op-amp? List the characteristics of an ideal op-amp? (10)
(b) What is a differential amplifier? Draw the circuit of op-amp as a differential amplifier and derive the values of . (10)

B.C.A. Degree Examination, May 2008. :
Computer Fundamentals : (upto 2002)
Time : Three hours
Maximum : 100 marks
Answer any FIVE questions.
All questions carry equal marks.
1. (a) Explain the main parts of a personal computer. (7)
(b) Write about classification of computers. (7)
(c) Explain business data processing. (6)
2. (a) What are the basic data types? (8)
(b) Convert the decimal number 48 into binary number. (4)
(c) Explain the purpose 2’s complement. (8)

3. Explain :
(a) Magnetic disk
(b) Magnetic tape
(c) Line printer. (20)
4. (a) Explain arithmetic and logic units. (10)
(b) Explain RAM and ROM. (10)
5. (a) Explain different types of software. (10)
(b) Explain the functions of operating system. (10)
6. (a) Write about the features of word processing. (10)
(b) Explain data base management systems. (10)
7. Explain the stages in program development. (20)
8. Write short notes on :
(a) top down design (6)
(b) debugging (6)
(c) testing and verification. (8)

B.C.A. Degree Examination, May 2008 :
Cobol And Business Data Processing : (Upto 2002 onwards)
Time : Three hours
Maximum : 100 marks
Answer any FIVE questions.
1. (a) Distinguish manual data processing and computer data processing applications. (6)
(b) What is literal? What are the different types of literal in COBOL? Explain. (8)
(c) Distinguish files and records in COBOL. (6)
2. (a) What is a level number? How they are declared and differentiated? (10)
(b) Explain the editing characters in COBOL with example. (10)
3. (a) Explain the various types of Arithmetic verbs with its syntax and example. (10)
(b) What is table? How they are declared and used in COBOL? Explain it with example. (10)
4. (a) Explain the rules of file operation statements with its syntax. (10)
(b) Explain the various types of file organization in COBOL. (10)
5. (a) Explain the data processing concepts. (10)
(b) Distinguish verification and validation in COBOL. (10)
6. (a) What is bubble sort? Explain it with example. (10)
(b) Distinguish linear search and binary search with example. (10)
7. (a) Explain the four stages of payroll processing. (10)
(b) What is inventory? Why they are used in business? What is the purpose? Explain with example. (10)
8. Write a COBOL program to create an employee file? Access the above file to calculate the net pay. (20)

Fortran Programming : (Upto 2002)
Time : Three hours
Maximum : 100 marks
Answer any FIVE questions.
1. (a) Write FORTRAN expression for the following mathematical expressions. (10)
(b) Explain READ statement with suitable example. (10)
2. (a) Explain Logical IF statement with suitable example. (10)
(b) Write a FORTRAN program to find the largest number among the three numbers. (10)
3. (a) Explain DO statement with suitable example. (10)
(b) Write a FORTRAN program to find the sum of the series 1 + 3 + 5 + . . .N. (10)
4. (a) What is subscripted variable? What is the use of DIMENSION statement? (8)
(b) Write a FORTRAN program to sort the given set of n numbers into ascending order. (12)
5. (a) Explain the format characters I, F and X with suitable example. (10)
(b) Write a FORTRAN program to find the mean of set of n integers.