BCA MAGADH UNIVERSITY QUESTION (2015)

BCA MAGADH UNIVERSITY QUESTION (2015) 

                                                                              2015
                                                                       Time: 3 hours
                                                                       Full Marks: 75
                                                      The questions are of equal value.
                                                Answer five questions, selecting atleast two
                                                   two questions, from each section.
 
                                                                      Section- A
 
(1). What is computer Network ? Describe different Network Topologies.

(2). What is Boolean algebra ?  Describe a half adder using:
       (a) NAND gates only
       (b). NOR gates only

(3) (a). What is Switching? Differentiate between circuit switching and packet switching.
      (b). How is performance improved is CSMA/ CD protocol compared to CSMA protocol ?

(4) (a). Discuss 7 layers of OSI model, with their functionality.
      (b). Why transport layer protocols, like TCP and UDP are called end to end protocols ? What is  the differences between them?

(5)  Write short notes on any two of the following:
       (i). POP and web- based E-mail
       (ii). VSAT
       (iii). Internet v/s Intranet
       (iv). Growth of internet.

                                                                      Section-B

(6) (a). What is the function of if-statement? explain with example.
      (b). Write a program in C to determine whether n given number is " Odd" or " Even" and print the  message.
              NUMBER IS EVEN
               OR
              NUMBER IS ODD
              Without using else option.

(7). What are pointers ? Why are they required ? How do you declare and initialize them? Write a program to read two integers x and y and swap the contents of the two variables x and y using pointers.

(8). What do you meany by strings ? State some library functions for string manipulation. Also create a function in C to find the length of the string.

(9) (a). Write a program to find the number of vowels in the given line text.
      (b). Differentiate between an array and  a structure. Explain with an example.

(10). Differentiate between:
         (a). Relational operators and logical operators
         (b). ++ x and x++
         (c). Logical AND  and logical OR  operators
         (d). >> and << operators
         (e). While and do-while loops.