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COMPUTER SYSTEM & APPLICATIONS
Time : 3 Hours
October - 1998
Marks : 100
 
Section I
(PART A)
Q.1 a) Answer the following in one or two lines:
6
    i) What is the function of Arithmetic and logic unit?
 
    ii) Give two examples of system software.
 
    iii) When do you say that a 5.25’’ flopy disk is write protected?
 
    iv) What is an electronic spread sheet?
 
    v) What is a Compiler?
 
    vi) What is the use of DOS command called TYPE?
 
  b) Distinguish between Machine Language and Assembly language.
4
  c) Answer the following in COBOL :-Write COBOL statements for the following.
 
    i) To increase VOTER by 1 when AGE exceeds 18.
 
    ii) TO initialise data item E-NAME by storing 10 blank spaces.
 
    iii) To execute the paragrah TOT-PARA when SYS-CODE is 0.
 
    iv) To open IN-FILE for input and OU-FILE for output.
 
  d) Explain with an example the purpose of the following functions in LOTUS 1-2-3.
4
    i) @COUNT ii) @ VAR
 
       
 
Q.2 a) State Whether the following are true or false.
6
    i) A Micro-computer can be used even without the operatin system.
 
    ii) ROM is a volatile memory.
 
    iii) A serial printer prints one line at a time.
 
    iv) COPY A: TTT. DOC PPP. TXT is valid DOS command.
 
    v) A compiler does not execute a program.
 
    vi) Integrated circuites were used in Third generation computers.
 
  b) Write a short note on :
4
    i) Impact printers ii) Application softwere.
 
  c) Answer in COBOL :
4
    Write the entries for the first three divisions of a COBOL program for the following problem.
 
    i) Supose the name of the program to be written is ADR-LBL.
 
    ii) To compile and execute this program using IBM-PC.
 
    iii) Three independent data items will be used in the program : E-NO, 5 characters, E-NAME, 20 characters and ADDR-1, 60 Characters.
 
  d) The following data has been entered in LOTUS 1-2-3.
4
    A B C 1 NMAE AGE WEIGHT 2 (YRS) (KGS) 3 MOHIT 14 28 4 RAJAT 24 55 5 ANIL 19 68 6 KAJAL 15 40 7 SAM 14 33 8 CHARLIE 19 54 9Give commandsI) to re-arrange the above data according to the decreasing order of age.ii) to save worksheet as STUD.
 
Q.3 a) Mention any 2 differences between the following.
6
    i) Dot matrix printer and letter quality printer.
 
    ii) First generation and second generation of Conputers.
 
    iii) Hard disk and Floppy disk.
 
  b) Write a short note on Operating system
4
  c) What is the use of WORKING-STORAGE SECTION in a COBOL program? Explain.
4
  d) Answer in LOTUS 1-2-3.Write commands to do the following.
 
    I) To copy the contents from cells A4 to A20 to cells to C4 to C20.
 
    ii) To increase the values in cells C4 to C20 by 20%.
 
    iii) To find total of values in cells C4 to C20 in cell C22.
 
    iv) To print the current worksheet.
 
       
 
Q.4 a) Write short note on :
6
    i) CPU ii) LAN
 
  b) Write DOS commands for the following.
4
    i) To change the system date to today’s date.
 
    ii) To copy all the files from current directory to drive A.
 
    iii) To display the directory of those files whose filename begins with letter B.
 
  c) State whether the following statements are true or false in COBOL.
4
    i) Numeric literal cannot exceed 120 characters.
 
    ii) It is possible to define more than one file using SELECT clause.
 
    iii) If A = 5, B = 3 and C = 10 before executing the statement ADD A B TO C, then after executing this statement the value in C is 8.
 
    iv) Picture characters V and X cannot appear together in a picture description.
 
  d) Answer in LOTUS 1-2-3.
 
    Write commands to do the following.
 
    i) To retrieve a file.
 
    ii) To change the width of every column to 15.
 
    iii) To view the current graph.
 
    iv) To delete the contents of range of cells B1 to B20.
 
       
 
Q.5 a) Answer any one of the following in COBOL :
 
    i) There are 2 COBOL files called PAY & NEW-PAY. Both these files are assigned to disk in a program and have identical record structure. 01 PAY-REC 05 E-NAME PIC X (20) 05 B-PAY PIC 9(6) V99. and 01 NEW-PAY-REC. 05 NEW-E-NAME PIC X (20) 05 NEW-B-PAY PIC 9(6)V99.defined in DATA DIVISION. Write PROCEDURE DIVISION statements to open these files and copy the records of the file PAY to NEW-PAY when B-PAY is more than Rs. 3000, one by one till the end of file is reached.After this close these files and then stop the program.ii) Three are 2 COBOL files called MARK-FILE. Both these files are assigned to disk in a program and have idential record structure. 01 MARK-REC. 05-M-NAME PIC X(20) 05-M-MARK PIC 9(3). and 01 PASS-REC 05 P-NAME PIC X(20) 05 P-MARK PIC 9(3)defined in DATA DIVISION. Write PROCEDURE DIVISION statements to open these files and copy the records of the file MARK-FILE to PASS-FILE only when M-MARK is 35 or more, one by one till end of file is reached. After this close these files and then stop the program.
 
  b) Answer any one of the following in LOTUS 1-2-3.
7
    i) You are given following information.Month : Jan Feb Mar Apr May Jun Jul Aug Sep OctSales : 302 434 445 348 411 209 308 321 424 445Here months are entered in cells A2 to A11 and Sales values are entered in cells B2 to B11. Explain the procedure.a) To calculate MEAN and Standard Deviation of Sales.b) To Display PIE chart for Sales.c) You have entered Name, Basic pay for 20 employees in cells A2, A21 and B2.... B21 respectively. Explain the procedure to prepare a work-shhet showing DA. HRA, PF. and Net where DA is 110% of Basic pay, HRA is 30% of Basic pay, PF is 10% of (Basic pay + DA). Net is Basic Pay+ DA + HRA-PF. Also calculate average Net in cell C10 and save this file as MONTH4.
 
Section I (PART B)
 
Q.1 a) Answer the following in one to two lines :
6
    i) What is the function of Arithmetic and logic unit?
 
    ii) Give two examples of system softwere.
 
    iii) When do you say that a 5.25’’ flopy disk is write protected?
 
    iv) What is an electronic spread sheet?
 
    v) What is a Complier?
 
    vi) What is the use of DOS command called TYPE?
 
  b) Distinguish between Machine Language and Assembly language.
4
  c) Answer in C.
4
    i) What does the following program print.
 
    ii) main ()
{ float p = 210.6278;
int = q = 2719;
print f(‘’% 3f % 6. 1f/n’’, p,p);
Print f(‘’%+8d% - 8d/n’’, q,q);
 
  d) Write a C program to accept time in hours, minutes and seconds and then calculate and print the time in seconds.
4
       
 
Q.2 a) State whether the following are true or false.
6
    i) A Micro-computer can be used even without the operating system.
 
    ii) ROM is a volatile memory.
 
    iii) A serial printer prints one line at a time.
 
    iv) COPY A : TTT. DOC PPP. TXT is valid DOS command.
 
    v) A computer does not execute a program.
 
    vi) Integrated circuites were used in Third generation computers.
 
  b) Write a short note on :
 
    i) Impact printers ii) Application softwere.
 
  c) Answer in C :What does the following program print?
main ()
{int x =1, y = 3;
while (x<20) { y++;
x + = ++ y;
print f(‘’%d/n’’, x,y);}
 
  d) Write a C program to accept sales amount and then print sales amount, discount and net amount where discount is at the rate of 5% of sales.
4
       
 
Q.3 a) Mention any 2 differences between the following.
 
    i) Dot matrix printer and Letter quality printer.
 
    ii) First generation and second generation of Computers.
 
    iii) Hard disk and Floppy disk.
 
  b) What a short note on Operating system.
4
  c) Answer in C.
 
    i) What does the following program print.
 
    ii) main ()
{int x,y,z;
for (x=10;
x<15; x+ = 4)for (y = 2;
y < 5; y + =2){ z = x*y;
printf(‘’%d %d %d/n’’, x,y,z);
} }}
 
  d) Answer in C.
4
    i) What is the difference between gets () and scanf ()?
 
    ii) When do you use array variables in a program? Explain.
 
       
 
Q.4 a) Write short note on :
6
    i) CPU ii) LAN
 
  b) Write DOS commands for the following.
4
    i) To change the system date to today’s date.
 
    ii) To copy all the files from current directory to drive A.
 
    iii) To display the directory of those files whose filename begins with letter B.
 
    iv) To display directory of all the files from a subdirectory called DBASE.
 
  c) Answer in C.
 
    i) Rewrite the following program using do/while loop.
main ()
{int a = 0, n;
for (n = 10; n < 22; n+=3){ a + = n;
print f(‘’%d/n’’,a);
}}
 
  d) Write a program in C to print the sum of all even numbers from 100 to 500 are divisible by 13.
4
       
 
Q.5 a) Answer any one of the following in C :
14
    i) Write a program to enter principal amount (p) and rate of interest ® and print year (y) and compound interest (ci) each year for the first 5 year.
 
    ii) Write a program to accept 14 numbers and then find and print their mean (am) and standard deviation (sd).Where am =
 
    iii) Write a program to accept coefficients of quardratic equation ax2 + bx + c = 0 and then find and print their roots where the roots are :
 
       
 
Section II
 
Q.6 a) Write statements in dBASE for the following.
 
    i) To move the record pointer to the end of the file.
 
    ii) To increase the contents of memoryvaribale X by 1.
 
    iii) To delete records whose record numbers are 10, 15 and 20.
 
    iv) To execute a dBASE program called GATE.
 
    v) To change the drive in use to Drive C.
 
    vi) To undelete the first five records.
 
    vii) To display ‘’WISH YOU A BRIGHT FUTURE’’ at the centre of 80 column line in row 5 on the screen.
 
    viii) To erase the contents on the screen.
 
    ix) To display date before 60 days from today.
 
    x) To display number of characters in a character variable T.
 
  b) What is the use of QUICK MENU in WORLD-STAR? Give any three commands.
4

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