SEE New Model Computer Science Questions 2077 SET 1 [Vidhyarthi Publication]

SEE New Model Computer Science Questions 2077 SET 1 [Vidhyarthi Publication]

Computer Science

SEE  Model Question

Time: 1 hr 30 min

F.M. : 50

Group ‘A’ (10 Marks)

 

1.     Answer the following questions in one sentence.          [6×1=6]

 

a.     What is internet?

Internet is an interconnection of several thousands of computers of different types belonging to the various networks all over the world in order to share data and information.

 

b.     What is browser?

Web browser is a computer program that access web pages and displays them on the user computer.

 

c.      Which is the logical data type of MS Access?

Yes/No is the logical data type of MS Access.

 

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

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

 

e.     Which is the structure programming language?

C language is the structure programming language.

 

f.      Write any two data types of C language.

int and char are any two data types of C language.

 

2.     Write appropriate technical terms for the following:   [2×1=2]

a.      Crimes committed using electronic devices and cyber space. Cyber crime

b.     A malicious program of computer that damages data and software. Computer virus

 

3.     Write the full forms of the following:                            [2×1=2]

a.      UTP: Uninterruptible Power Supply

b.     WWW: World Wide Web

 

Group ‘B’ [24 Marks]

 

4.     Answer the following questions.                                     [9×2=18]

 

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

A computer network means two or more computers connected with each other to share data, hardware, software and other resources.

Any two disadvantages of it are:

                           i.          The sharing of information may leak the privacy of other clients.

                         ii.          The networking cost is high

 

 

 

b.     What is cyber ethics? Write any two cyber ethics.

Cyber ethics can be defined as to follow the rules and regulation of computer technology and not to harm other computer users knowingly or unknowingly.

Any two cyber ethics are:

                           i.          You should not spread false and illegal information.

                         ii.          You should not destroy, erase or edit personal or group records.

 

c.      What is hardware security? Write the role of UPS in hardware security.

The security given to the machine and peripheral hardware from theft and from electronic intrusion (interruption) and damage.

The role of UPS in hardware security system is that it controls fluctuation of electric voltage and provides enough backup electric power to the computer system when there is power failure.

 

d.     What is e-banking? Write any two uses of it.

E-banking refers to conduct financial transactions like funds transfer, payment of bills, opening bank accounts online etc via the internet

Any two uses of e-banking are:

                           i.          It saves the time of customers as they can easily access their account with the help of their device.

                         ii.          All transactions are recorded & stored digitally. So, the chances of human error are minimized.

 

e.     What is database management system? Give two examples.

DBMS is a software which helps to extract, view and manipulate data in an organized way. E.g. MS-Access and Oracle.

 

f.      What is database? Give any two examples.

A database is an organized collection of related information that can be used for different purpose so that it can easily be accessed, managed, and updated. E.g. Dictionary and Telephone Directory.

 

g.     Define field and record.

A column in a table is called field, and it contains a specific piece of information within a record.

Record is a collection of multiple related fields in a row which gives complete information about a person or thing.

 

h.     What is a report? Write its use.

Report is an object of Ms-Access which displays the output in an effective way to present the data in a printed format.

Uses of report are:

                           i.          It helps to prepare well formatted output.

                         ii.          It displays the information the way we want to view it.

 

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

Form is an object of Ms-Access which provides graphical interface to enter data into the tables or multiple linked tables.

Any two uses of form are:

                           i.          It provides an interactive platform for input of data into the database.

                         ii.          It helps to display data in more presentable form than a datasheet.

 5.     Write the output of the given program: (Workout with dry run)              [2]

DECLARE FUNCTION OUTPUT1(A)

CLS

N=135

CALL OUTPUT1(N)

END

 

SUB OUTPUT1(A)

DO WHILE A < > 0

R = A MOD 10

T = T + R

A = A \ 10

LOOP

PRINT T

END SUB

 

5.     Dry run Table

N	A	DO WHILE A < > 0	R=A MOD 10	T=T + R	A=A\10	PRINT T
135	135	135 < > 0 Yes	135 MOD 10 = 5	0+5=5	135\10=13	9
	13	13 < > 0 Yes	13 MOD 10=3	5+3=8	13\10=1
	1	1 < > 0 Yes	1 MOD 10=1	8 + 1=9	1\10=0
	0	0 < > 0 No Loop Exits

 

 The output of the program is:

9

 

6.     Re-write the given program after correcting the bugs.                              [2]

REM to create a new file

CLS

OPEN “ABC.DAT” FOR INPUT AS #1

DO

            INPUT “Enter Name, Roll No & Total. “; N$, R, T

            INPUT #1, N$, R, T

            INPUT “Supply more records Y/N”; C$

LOOP WHILE UCASE(Y$)=”Y”

CLOSE #1

END

 

Debugged Program

REM to create a new file

CLS

OPEN “ABC.DAT” FOR OUTPUT AS #1

DO

            INPUT “Enter Name, Roll No & Total. “; N$, R, T

            WRITE #1, N$, R, T

            INPUT “Supply more records Y/N”; C$

LOOP WHILE UCASE$(C$)=”Y”

CLOSE #1

END

 

7.     Study the following program and answer the given questions.                   [2×1=2]

OPEN “EMP.DAT” FOR INPUT AS #1

DO

INPUT #1, N$, A$, S

IF UCASE$(A$)=”KATHMANDU” THEN

                        PRINT N$, A$, S

END IF

LOOP WHILE NOT EOF(1)

CLOSE #1

END

a.     Write the use of statement “INPUT #1, N$, A$, S” in the above program.

the use of statement “INPUT #1, N$, A$, S” in the above program to read data from the data file EMP.DAT.

b.     What happens if you remove “UCASE$” from the above program?

If UCASE$ is removed then if Kathmandu is in small letters then it won’t be displayed on the screen.

8.     Convert / Calculate as per the instruction.                                                  [4×1=4]

a.      (ABC)₁₆ = (?)₈

Soln:

Converting Hexadecimal value to binary

Hexa-decaimal number	A	B	C
Binary value in four bits	1010	1011	1100

Again,

Converting Binary to octal

Binary value in three bits	101	010	111	110
Octal number	5	2	7	6

 

(ABC)₁₆ = (5276)₈

 

b.     (52)₁₀ = (?)₂

Soln:

		Remainder
2	52
2	26	0
2	13	0
2	6	1
2	3	0
2	1	1
2	0	1

 

(52)₁₀ = (110100)₂

 

a.      (1010)₂ + (110)₂ – (1111)₂ = (?)₂

 

	1	0	1	0
	+	1	1	0
1	0	0	0	0
-	1	1	1	1
0	0	0	0	1

 

(1010)₂ + (110)₂ – (1111)₂ = (1)₂

 

 

 

a.      (1101101)₂ ¸ (110)₂

110)	1	1	0	1	1	0	1(	10010
	-1	1	0
	0	0	0	1	1	0
				-1	1	0
				0	0	0	1
							-0
							1

 

Quotient=10010

Remainder=1

 

 

9.     a. Write a program in QBASIC that allows the user to input length, breadth and height and then calculate the area of 4 walls. Hint: [A = 2H(L+B)]

 

DECLARE FUNCTION AREA (L, B, H)

CLS

INPUT “ENTER LENGTH”; L

INPUT “ENTER BREADTH”; B

INPUT “ENTER HEIGHT”; H

PRINT “AREA OF FOUR WALLS”; AREA(L, B, H)

END

 

FUNCTION AREA (L, B, H)

A = 2 * H * (L + B)

AREA = A

END FUNCTION

 

b. Write a program to create a sequential data file named “Employ.Dat” to store Name, Post, Address and Salary for the number of employees. The program should terminate on user’s choice.

OPEN “Employ.Dat” FOR OUTPUT AS #1

TOP:

CLS

INPUT “Enter Name”; N$

INPUT “Enter Address”; A$

INPUT “Enter Post”; P$

INPUT “Enter Salary”; S

WRITE #1, N$, A$, P$, S

INPUT “Do you want to continue”; CH$

IF UCASE$(CH$)=”Y” THEN GOTO TOP

CLOSE #1

END

 

10.  Write a program in C language to input a number and then check whether the number is positive, negative or zero number.

 

#include<stdio.h>

#include<conio.h>

int main()

{

int n;

printf("Enter any number: ");

scanf("%d", &n);

if(n>0)

printf("%d is positive number",n);

else if(n<0)

printf("%d is negative number",n);

else

printf("%d is zero number",n);

return 0;

}

 

OR

 

Write a program in C language to display the series 1, 1, 2, 3, 5, 8 upto 10^th terms.

 

#include<stdio.h>

#include<conio.h>

int main()

{

int a,b,c,i;

a=1;

b=1;

for(i=1;i<=10;i++)

{

    printf("%d \n", a);

    c=a+b;

    a=b;

    b=c;

}

return 0;

}

***