Bhaktapur SEE MODEL SET-1
Subject: Opt. II
Computer Science
Time: 1:30 hrs. Full Marks: 50
Candidates
are required to give answers according to the instructions given.
Group
‘A’
1.
Answer the following questions in one sentence: [6x1=6]
a)
Define bandwidth.
Ans: The amount of data that can be carried from one point to another in a
given time period is called bandwidth.
b)
What is cyber-crime?
Ans: Cybercrime refers to criminal activities or
illegal actions that are conducted or facilitated through the use of digital
technology or the internet.
c)
Define AI.
Ans: Artificial
intelligence refers to the simulation of human intelligence in machines that
are programmed to think and act like humans.
d)
What is the storage size of text and currency data
type?
Ans: The storage size of text data type is 255 and
currency data type is 8 bytes.
e)
Define modular programming.
Ans: Modular programming is a technique used to divide
program into many small, manageable, logical and functional modules or blocks.
f)
Write any two features of C language.
Any two features of C language are:
It
is a high level language with some features of low level language.
It is mostly used
to prepare system software.
2.
Write appropriate technical terms for the following: [2x1=2]
a)
Physical
layout of computers in a network. Network Topology
b)
A
secret group of characters used to protect information systems from
unauthorized users. Password
3.
Write the full form of the following: [2x1=2]
a. STP
- Shielded Twisted Pair
b. NIC – Network Interface Card
Group
‘B’
4.
Answer the following questions: [9x2=18]
a)
Differentiate between client server architecture and
peer to peer architecture.
Ans: The difference between client server architecture
and peer to peer architecture are:
|
Client/ server network |
Peer-to-Peer network |
|
Client/ server network is a type of network model where at
least one computer is designed as a server and other computers on the network
called clients or workstations. |
Peer-to-Peer network is a type of network model where all
the computers have equal responsibilities on the network |
|
It provides central security administration and the
network administrator is responsible for data security and other resources
management of the network. |
It lacks centralized network administration, where the
network administrator needs to manage security on each computer. It provides
no reliable security and might put data in higher risks
|
b)
Write any four commandments of computer ethics.
Ans; Any four commandments of computer ethics are :
· Do not use a computer to harm other people.
· Do not use a computer to publish fake information.
· Do not search the file or record of other people.
· Do not destroy or delete the records of other people
c)
Define hardware security. Give any two measures of
software security.
Ans: Hardware security is the protection
given to the various hardware tools and equipment used in computer system from
the accidental or intentional harm.
Any two measures of software security are:
Password and Backup
d)
What is VR? Mention its application areas.
Ans: Virtual
reality is an artificial environment created with computer hardware and software and
presented to the user in such a way that it appears
and feels like a real environment.
Any
two areas where it is used are:
Gaming- VR Gaming
allows players to immerse (dip) themselves in virtual world and interact with
environment and characters
Education
- VR can help students learn by making the content more engaging and memorable.
e)
What is mobile computing? Write any four importance of
it.
Ans:
Mobile
computing refers to the use of portable computing devices, such as smartphones,
tablets, laptops, and wearables, that allow users to access and transmit data,
information, and applications without being tied to a fixed physical location.
Any four importance of it are:
It allows people to work and communicate from anywhere at
any time.
It keeps connected to the Internet, allowing to access
information all the times.
It increases the productivity of users reducing time and
cost.
It is one of the
major handheld sources of entertainment for users at present.
f)
Define DBMS with examples.
Ans: Ans: DBMS
is a software that manages databases, allowing users to store, access, and
manipulate data in an organized and secure way.
Examples of
DBMS software
are : MS-Access, Oracle, Fox pro, dBase etc.
g)
Define data redundancy. How can it be reduced?
Ans: Data redundancy refers to the repetition or
duplication of data within a database.
It can be reduced by normalizing the database,
eliminating duplicate data and storing it in separate tables, and using foreign
keys to establish relationships between the tables.
h)
What is data sorting? Write its two advantages.
Ans: Sorting refers to
the process of organizing data in a specific order (ascending or descending)
based on one or more fields in a table, query, or report.
Any two
advantages of using it are:
Sorting
helps to organize data and make it easier to find and retrieve specific
information.
Sorting can save time and improve efficiency by
allowing users to quickly access the data they need.
i)
Mention
any four data types used in MS-Access.
Any four data types used in MS-Access are text, memo,
Yes/No and Currency.
5.
Write down the output of the given program. [2]
DECLARE FUNCTION TEXT$(A$)
CLS
A$= “TECHNOLOGY”
Y$= TEXT$(A$)
PRINT Y$
END
FUNCTION TEXT$(A$)
B= LEN(A$)
FOR I = 1 TO B
IF I MOD 2 = 1 THEN
B$= B$+MID$(A$,I,1)
END IF
NEXT
I
TEXT$= B$
END FUNCTION
Dry
Run
|
A$ |
B |
I=1
to B |
IF
I MOD 2 =1 |
B$=B$+MID$(A$,I,1) |
Y$ |
PRINT
Y$ |
|
TECHNOLOGY |
10 |
1
to 10 |
1
MOD 2=1 1=1
yes |
T |
TCNLG |
TCNLG |
|
|
|
2
to 10 |
2
MOD 2=1 0=1
no |
|
|
|
|
|
|
3
to 10 |
3
MOD 2=1 1=1
yes |
T+C
= TC |
|
|
|
|
|
4
to 10 |
4
MOD 2=1 0=1
no |
|
|
|
|
|
|
5
to 10 |
5
MOD 2=1 1=1
yes |
TC+N=TCN |
|
|
|
|
|
6
to 10 |
6
MOD 2=1 0=1
no |
|
|
|
|
|
|
7
to 10 |
7
MOD 2=1 1=1
yes |
TCN+L=TCNL |
|
|
|
|
|
8
to 10 |
8
MOD 2=1 0=1
no |
|
|
|
|
|
|
9
to 10 |
9
MOD 2=1 1=1
yes |
TCNL+G |
|
|
|
|
|
10
to 10 |
10
MOD 2=1 0=1
no |
TCNLG |
|
|
|
|
|
11
to 10 Loop
Exit |
|
|
|
|
The
output of the program is
TCNLG
6. Rewrite the following program after
correcting the bugs. [2]
DECLARE FUNCTION SUM(N)
CLS
INPUT “ENTER A NUMBER”; N
SU= SUM(N)
PRINT “SUM =”; SUM(N)
END
FUNCTION SUM(N)
WHILE N< > 0
R = R MOD 10
S= S + R
N = N \ 10
WEND
S= SUM
END SUB
Debugged Program
DECLARE FUNCTION SUM(N)
CLS
INPUT “ENTER A NUMBER”; N
SU= SUM(N)
PRINT “SUM =”; SU
END
FUNCTION SUM(N)
WHILE N< > 0
R = N MOD 10
S= S + R
N = N \ 10
WEND
SUM=S
END FUNCTION
7.
Study the following program and answer the given questions. [2]
DECLARE SUB TEST(A$)
CLS
A$= “COMPUTER”
END
SUB
TEST (A$)
L=
LEN(A$)
FOR I = L TO 1
STEP -2
PRINT MID$(A$, I, 1)
NEXT I
END SUB
a)
What
statement should be added in the main module to execute the program?
Ans: CALL TEST(A$) statement should be added in the
main module to execute the program.
b)
List
out the variables used in the above program with types.
Ans: the variables used in the above program are:
A$ - String Variable
L, I – Numeric Variable
Group
‘C’
8.
Convert/ calculate as per the instruction. [4]
a)
(670)8
= (?)10
b)
(FACE)16
= (?)2
c)
1100
x 110
d)
111011
÷ 100
9.
a) Write a program in QBASIC that asks for the length, breadth and height of a
box. Create a user defined function to find the volume of the box and sub procedure to find the total surface area
of the box. [Hint: Vol=l x b x h ; Area=2(lb+bh+lh) [4]
DECLARE SUB TSAREA (L, B, H)
DECLARE
FUNCTION VOLUME (L, B, H)
CLS
INPUT
“ENTER LENGTH”; L
INPUT
“ENTER BREADTH”; B
INPUT
“ENTER HEIGHT”; H
CALL
TSAREA(L, B, H)
PRINT
“VOLUME OF CUBOID ”; VOLUME(L, B, H)
END
SUB
TSAREA (L, B, H)
T
= 2 * (L * B + B * H + H * L)
PRINT
“TOTAL SURFACE AREA OF CUBOID ”; T
END
SUB
FUNCTION
VOLUME (L, B, H)
VOLUME
= L * B * H
END FUNCTION
b.
Write a program to open a data file “Record.dat” which contains student’s name,
class and address and print only those students’ records whose name starts from an alphabet “A”. [4]
OPEN "Record.dat" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT #1, N$, C, A$
A$ = UCASE$(LEFT$(N$,1))
IF A$ = “A” THEN PRINT N$, C, A$
WEND
CLOSE #1
END
10. Write a program in C language to enter a
number and check if it is odd or
even. [4]
#include<stdio.h>
#include<conio.h>
int main()
{
int n;
printf("Enter any number: ");
scanf("%d", &n);
if(n % 2= = 0)
printf("%d is even number", n);
else
printf("%d is odd number", n);
return 0;
}
OR
Write a program in C language to
display the series:
2, 4, 6, 8, 10, 12……………10th term.
#include
<stdio.h>
int
main()
{
int a=2,i;
for(i=1;i<=10;i++)
{
printf("%d ", a);
a=a+2;
}
return 0;
}
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