Solved Computer Science SLC Examination 2069 (2013)
Optional II [Computer Science]
Examinees are required to answer in their own words as far as practicable. Credit shall be given to clarity and originality, not rote learning.
Time: 1 hour 30 minutes Full Marks: 50
Pass Marks:20
Attempt all the questions.
Computer Fundamental (22 marks)
Computer Fundamental (22 marks)
1. Answer the following questions:
a) Write any four advantages of computer network.
Ans: Any 4 advantages of computer network are as follows:
i) Computer in a network can access network connected hardware devices like printer, disk drives, etc.
ii) Information can be exchanged rapidly in computer network.
iii) Computers in a network environment can be updated from any computer.
iv) Software packages can be shared between network connected computers.
i) Computer in a network can access network connected hardware devices like printer, disk drives, etc.
ii) Information can be exchanged rapidly in computer network.
iii) Computers in a network environment can be updated from any computer.
iv) Software packages can be shared between network connected computers.
b) What is internet? Write the name of any two E-commerce sites.
Ans: Internet is an interconnection of several thousands of computers of different types belonging to the various networks all over the world.
c) What is computer ethic?
Ans: Computer ethics is the set of moral principles or code of conducts that should be followed by computer user.
d) What is hardware security? Write any two software security measures.
Ans: The security given to the various hardware tools or equipment from being lost or damaged due to accidental or intentional harm is hardware security.
Any two software security measures are:
i) password
ii) backup
e) What is computer virus?
Ans: Computer virus is a program written by the programmer with the intention of destroying and damaging the data and programs residing in the computer system.
3. Match the following:Group A Group B
a) RJ-45 a) Multimedia
b) WAN b) Duplicate copy
c) Back up c) Fiber optic cable
d) microphone d) Twisted pair cable
e) Internet
a) RJ-45 a) Multimedia
b) WAN b) Duplicate copy
c) Back up c) Fiber optic cable
d) microphone d) Twisted pair cable
e) Internet
Answers
Group A Group B
a) RJ-45 a) Twisted pair cable
b) WAN b) Internet
c) Back up c) Duplicate copy
d) microphone d) Multimedia
a) RJ-45 a) Twisted pair cable
b) WAN b) Internet
c) Back up c) Duplicate copy
d) microphone d) Multimedia
4. Select the best answer:a) Which is not unguided media?
i) Fiber optics ii) Microwave iii) Infrared iv) Radio wave
i) Fiber optics ii) Microwave iii) Infrared iv) Radio wave
Ans: Fiber optics
b) Which is the internet service?
i) IRC ii) Telnet iii) E-mail iv) All of the above
b) Which is the internet service?
i) IRC ii) Telnet iii) E-mail iv) All of the above
Ans: All of the above
c) Which is not related to multimedia?
i) Printer ii) Sound card iii) Microphone iv) CD-ROM
c) Which is not related to multimedia?
i) Printer ii) Sound card iii) Microphone iv) CD-ROM
Ans: Printer
d) Which virus infects boot sector files?
i) Macro virus ii) Multipartite virus iii) Boot sector virus
d) Which virus infects boot sector files?
i) Macro virus ii) Multipartite virus iii) Boot sector virus
iv) Program virus
Ans: Boot sector virus
5. Give appropriate technical terms: a) Business through internet.
5. Give appropriate technical terms: a) Business through internet.
Ans: E-commerce
b) The software that protects computer virus.
b) The software that protects computer virus.
Ans: Antivirus Software
c) Physical layout of LAN.
c) Physical layout of LAN.
Ans: Topology
d) A sector word that gives user access to a particular program or computer
d) A sector word that gives user access to a particular program or computer
system.
Ans: Password
6. Write the full forms of: a) VOIP = Voice Over Internet Protocol
6. Write the full forms of: a) VOIP = Voice Over Internet Protocol
b) MAN = Metropolitan Area Network
c) UTP = Unshielded Twisted Pair
d) WWW = World Wide Web
Group B Database(10 marks) 7. Answer the following questions:
Group B Database(10 marks) 7. Answer the following questions:
a) What is database? Give two examples.
Ans: Database is a collection of related and organized information that can be used for different purpose.
Two examples of database are:
i) Dictionary
ii) Telephone Directory
Two examples of database are:
i) Dictionary
ii) Telephone Directory
b) Write any two types of primary key.
Ans: The uses of Primary key are:
i) To reduce and control duplication of record in a table.
ii) To set the relationship between tables.
i) To reduce and control duplication of record in a table.
ii) To set the relationship between tables.
c) What is query?
Ans: Query is an object of Ms-Access which extracts and arranges information from a table.
8. Choose the best answer:
a) Which of the following is not a database application?
i) Oracle ii) Foxpro iii) MS-Access iv) MS-Excel
a) Which of the following is not a database application?
i) Oracle ii) Foxpro iii) MS-Access iv) MS-Excel
Ans: MS-Excel
b) Memory space consumed by a currency data type maximally is …………
i) 2 bytes ii) 4 bytes iii) 8 bytes iv) 1 GB
b) Memory space consumed by a currency data type maximally is …………
i) 2 bytes ii) 4 bytes iii) 8 bytes iv) 1 GB
Ans: 8 bytes
c) The default data type of MS-Access is:
i) Number ii)Text iii) Memo iv) Auto number
c) The default data type of MS-Access is:
i) Number ii)Text iii) Memo iv) Auto number
Ans: Text
d) Row is also called …………
i) Record ii) Field iii) Database iv) Table
d) Row is also called …………
i) Record ii) Field iii) Database iv) Table
Ans: Record
9. Match the following: Group A Group B
i) OLE a) Data Entry
ii) Hyperlink b) Formatted Hardcopy
iii) Report c) 1 GB
iv) Form d) Up to 255 characters
e) Up to 2048 characters
Answers
Group A Group B
i) OLE 1 GB ii) Hyperlink Up to 2048 characters
iii) Report Formatted Hardcopy
i) OLE 1 GB ii) Hyperlink Up to 2048 characters
iii) Report Formatted Hardcopy
iv) Form Data Entry
Group-C
Programming(18 marks)
10.a) What is meant by mode of data file?
Ans: Mode of data file means opening a sequential file for one of the three modes of operation like output mode, input mode and append mode.
b) Write any two characteristics of ‘C’ language.
Ans: The characteristics are :
i) It is a high level language with some features of low level language.
ii) It is mostly used to prepare system software.
i) It is a high level language with some features of low level language.
ii) It is mostly used to prepare system software.
c) Write the function of the following statements:
i) NAME
i) NAME
Ans: The NAME statement renames a file on a disk.
ii) KILL
Ans: The KILL statement deletes the file or files from the specified drive and directory.
11. Write the output of the following program
DELARE SUB NUMBER()
CLS
CALL NUMBER
END
SUB NUMBER
N=3
C=1
WHILE C<=5
PRINT N
N=N*10+3
C=C+1
WEND
END SUB
12. Rewrite the given program after correcting the bugs:
REM display Records of students From Data File
OPEN “STDREC.DAT” FOR INP AS #1
PRINT “ROLL”,”NAME”,”ADDRESS”,”CLASS”,”SECTION”
DO WHILE NOT EOF
INPUT #1,RN,N$,AD$,CL,S$
PRINT RN,N$,AD$,CL,S$
NEXT
CLOSE #1
END
Debugged Program
REM display Records of students From Data File
OPEN “STDREC.DAT” FOR INPUT AS #1
PRINT “ROLL”, ”NAME”, ”ADDRESS”, ”CLASS”, ”SECTION”
DO WHILE NOT EOF (1)
INPUT #1, RN, N$, AD$, CL, S$
PRINT RN, N$, AD$, CL, S$
LOOP
CLOSE #1
END
13. Study the following program and answer the given questions:DECLARE SUB EXAM(N$)
CLS
INPUT “Enter word”;WO$
CALL EXAM(WO$)
END
SUB EXAM (N$)
FOR I = 1 TO LEN (N$)
PRINT RIGHT$(N$,I)
NEXT I
END SUB
a) Write the names of two built-in functions used in the above program.
Ans: The names of two built-in functions used in above program are LEN( ) and RIGHT$( ) .
b) List the real parameter in the program.
Ans: The real parameter used in the above program is WO$.
14. a) Write a program to find the numbers of vowels in an input string using ‘FUNCTION…..END FUNCTION’.
DECLARE FUNCTION COUNT (S$)
CLS
INPUT "ENTER ANY STRING"; S$
PRINT "TOTAL NO. OF VOWELS= "; COUNT(S$)
END
FUNCTION COUNT (S$)
VC = 0
FOR I = 1 TO LEN(S$)
B$ = MID$(S$, I, 1)
C$ = UCASE$(B$)
IF C$ = "A" OR C$ = "E" OR C$ = "I" OR C$ = "O" OR C$ = "U" THEN
VC = VC + 1
END IF
NEXT I
COUNT = VC
END FUNCTION
b) Write a program using sub procedure module to print the series 1,1,2,3,5,8.. up to ten terms.
DECLARE SUB SERIES ( )
CLS
CALL SERIES
END
SUB SERIES ( )
A = 1
B = 1
FOR I = 1 TO 10
PRINT A;
C = A + B
A = B
B = C
NEXT I
END SUB
OPEN “teldir.dat” FOR OUTPUT AS #1
DO
CLS
INPUT “ENTER NAME”; N$
INPUT “ENTER ADDRESS”; A$
INPUT “ENTER TELEPHONE NUMBER”; T#
WRITE #1, N$, A$, T#
INPUT “DO YOU WANT TO CONTINUE(Y/N)”; CH$
LOOP WHILE UCASE$(CH$) = ”Y”
CLOSE #1
END
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