PABSON PRE BOARD 2080
Subject: Computer Science Full Marks: 50
GROUP “A”
(Very Short Questions -10 Marks)
1. Answer the following questions : 6×1=6
a. Which connector is used with coaxial cable?
b. Why data decryption is necessary?
c. Which data types are used to store graphics and numeric characters in MS Access?
d. List any two objects of MS Access.
e. What is the function of MOD in QBASIC?
f. Write name of unary operators used in C programming.
2. Give the appropriate technical terms of the following: 2×1=2
a. The protection of computer systems and sensitive information from unauthorized access, theft or damage.
b. The internet tool which is used to upload/download data
3. Write the full form for the following: 2×1=2
(a) ISDN (b) VOIP
Group “B”
(Short Questions-24 Marks)
4. Answer the following questions: 2×9=18
a. What is topology? Draw the figure of star topology.
b. What is cyber ethics? List out any two cybercrime.
c. What is hardware security? Write any two measures of software security.
d. What is e-governance? Give any two examples.
e. Define cloud computing with example.
f. Differentiate between Database and DBMS.
g. What is primary key? Write its importance.
h. What is data type? List any two data types of MS Access.
i. Why update query is necessary in Database system? Give reason.
5. Write output of the given program showing necessary rough: 2×1=2
DECLARE SUB Show ()
CLS
CALL Show
END
SUB Show ()
FOR I = 1 TO 7 STEP 3
S=S+I^3
NEXT I
PRINT S
END SUB
6. Rewrite the program after correcting the bugs : 2×1=2
REM display records of students from sequential data file
OPEN “STUDENT.DAT” FOR INP AS #1
PRINT “SNO”, “NAME”, “ADDRESS”, “CLASS” , “SECTION”
WHILE NOT EOF
INPUT #1,SN,N$,AD$,C,SE$
PRINT SN,N$,AD$,C,SE$
NEXT
CLOSE #1
STOP
7. Read the following program and answer the following questions: 2×1=2
DECLARE FUNCTION num(N)
FOR I = 1 TO 5
READ N
Z=num(N)
S=S+Z
DATA 11,14,16,15,7
END
FUNCTION num(N)
if N MOD 2 = 0 THEN num=N
END FUNCTION
a) List the library functions used in the above program.
b) Write the name of the function used in the above program.
8. Calculate / Convert as per the instruction: 4×1=4
a) (101110111)2=(?)8
b) (248)10=(?)2
c) (1101)2×(110)2-(1011_2=(?)2
d) (1011101)2÷(101)2
9. a) Write QBASIC to print circumference of a circle using SUB and volume of a cylinder using FUNCTION. (4)
Hint : [C=2×22/7×R, VC=22/7×R^2×H]
b) A sequential data file “Employee.dat” has some records with field’s serial number, name , Address, post and salary for the number of employees. Write a program to display all the records of those employee’s whose salary is more than Rs. 50000. (4)
10. Write C program to read any three integers numbers from the keyboard and find the smallest number.
OR
Write C program to print first 10 natural number. (4)
The End
