Solution of computer science asked in SEE 2078. The full mark of computer is 50 whereas pass mark is 16. The time duration of the examination is 1 hour 30 minutes.

Group A

1. Answer the following questions in one sentences: (6x1=6)

a) Write the name of any two search engine.

The two search engine are: Google and Bing

b) What is social media?

Social media are the web based application that allows user to connect, interact and share files between several user.

c) Which data type is suitable to store photographs of students in MS-Access?

OLE is used to store photographs of students in MS-Access.

d) Which view is used to modify a table structure in MS-Access?

Design view is used to modify a table structure in MS-Access.

e) Which statement is used to call sub-procedure?

CALL is used to call sub procedure.

f) Write any two data types used in C language.

float and int are the two data types used in C language.

2. Write appropriate technical term for the following. (2x1=2)

a) A system of copying data and information residing in computer into another location.  uploading

b) A company which provides services of Internet. ISP(Internet Service Provider)

3. Write the full form of the following. (2x1=2)

a) FTP: File Transfer Protocol

b) MAN: Metropolitan Area Network

Group B

4. Answer to the following question. (9x2=18)

a. What is computer network? Write any two advantages of it.

The group of computer interconnected with each other through transmission media for the purpose of sharing hardware, software and other resources is called computer network.The two advantages of it are:

• It helps to share expensive hardware.
• It helps to share database.

b. Define software security? Write any two protection measure for it.

The measure adopted to protect our computer software from intentional of accidental loss or damage is called software security. The two protection measure of it are:

• Regular Backup
• Password

c. What is a search engine? Write any two popular search engine.

The web based application designed to search content based on keyword supplied by the user is called search engine. The two popular search engine are: google.com and bing.com

d. Define e-commerce. Write any two benefits of it.

The process of buying and selling goods and services through internet is called e-commerce. The two benefits of it are:

• Always available.
• Physical store not required.

e. Write any two advantage and disadvantages of social media.

The two advantages of social media are:

• Connect with friends and families.
• Information sharing

The two disadvantages of social media are:

• Identity theft
• Hacking

f. What is DBMS? Write any two advantages of it.

DBMS stands for Database Management System which is a software that help to store, analyze and manipulate data according to the need of the user. The two advantages of DBMS are:

• It helps to reduce duplication of data.
• It helps in faster access of data.

g. What is primary key? Write any two feature of it.

The primary key is the field that helps to uniquely identify the records from the database. The two feature of it:

• Primary key does not accept null value.
• Primary key does not accept duplicate value.

h. Define field and record.

The column of a database table is called field.

The row of a database table is called record.

i. Define form. Write any two uses of it.

The object of a MS-Access that allows user to enter and modify data in database table. The two uses are:

• It allows user to enter data in database table.
• It allows user to modify data of database table.

5. Write the output of the given program (Workout with a dry run). (2)

DECLARE SUB ABC(A)
CLS
A=2
CALL ABC(A)
END

SUB ABC(A) 
FOR J=1 TO 5
PRINT A;
A=A+3
NEXT J
END SUB

Dry Run

Output:

2 5 8 11 14

6. Re-write the given program after correcting the bugs. (2)

DECLARE SUB series( )
CLS
EXECUTE series
END

SUB series
REM program to generate 1 1 2 3 5 ….. unto the 20th terms
A=1
B=1
FOR ctr = 10 to 1
DISPLAY A; B;
A=A+B
B=A+B
NEXT ctr
END series ()

Solution:

DECLARE SUB series( )
CLS
CALL series
END

SUB series
A=1
B=1
FOR ctr = 10 to 1 step -1
PRINT A; B;
A=A+B
B=A+B
NEXT ctr
END SUB

7. Study the following program and answer the given questions. (2)

DECLARE FUNCTION TEST(X)
X = 100
Z = TEST(X)
PRINT Z
END 

FUNCTION TEST (X)
FOR R=1 TO X
S=S+1
NEXT R
TEST = S
END FUNCTION

a) How many parameters are used in the above program?

One parameter X is used in the above program.

b) How many times does the statement s=s+1 execute in the above program?

The statement s=s+1 executes  100 times in the above program.

Group C

7. Convert / Calculate as per the instruction. [4x1=4]

Please refer to these video for the complete concept and solution of Number System.

i. (11111101) Binary into Hexadecimal

ii. (245) Decimal into Binary

iii. (1010)x(101) = ?

iv. (101110)/(110)

8. Answer the following questions. (2x4=8)

a) Write a program in QBASIC that asks length, breadth of a room and calculate its area and perimeter. Create a user-defined function to calculate area and sub program to calculate perimeter. [Hint: (Area = LxB , Perimeter=2x(L+B) ]

DECLARE FUNCTION area (l, b)
DECLARE SUB peri (l, b)
CLS 
INPUT “Enter length and breadth”; l, b
x = area (l, b)
PRINT “Area is”; x
CALL peri (l, b)
END

FUNCTION area(l ,b)
a = l*b
area = a
END FUNCTION

SUB peri(l, b)
p = 2x(l+b)
PRINT “Area is”; p 
END SUB

b) Write a program to create a sequential data file “salary.dat” to store programmer’s name, salary and post according to the need of the user.

OPEN “salary.dat” FOR OUTPUT AS #1
CLS
DO
INPUT “Enter name salary and post”; n$, s, p$
WRITE #1, n$, s, P$
INPUT “Press Y to add more”; x$
LOOP WHILE (x$ = “Y” OR x$ = “y”)
CLOSE #1
END

9. Write a program that asks a number and check whether it is negative, positive or zero. [4]

#include <stdio.h>
void main ( )
{
int n;
printf(“Enter any number”);
scanf(“%d”, &n);
if (n>0)
{
printf(“%d is positive”, n);
}
else if (n<0)
{ 
printf(“%d is negative”, n);
}
else
{ 
printf(“%d is zero”, n);
}
getch( );
}

OR,

Write a program in C language to display first 10 odd numbers.

#include <stdio.h>
void main ( )
{
int i;
for(i = 1; i<=20; i=i+2)
{
printf(“%d \t”, i);
}
getch( );
}

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