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Question Paper

HSST Computer Science / Application ( Senior ) Question Paper - 2004
Maximum: 100 marks                                          Time: 1 hour and 15 mins

1. Flow control in TCP/IP is handled using:
(A) Urgent pointer
(B) Acknowledgement number
(C) Checksum
(D) Variable-size sliding window


2. Which among the following is a protocol 'of Wireless LAN?
(A) 802.2 (B)802.3
(C) 802.5 (D) 802.11


3. The default payload of TCP segment established during connection setup in bytes is :
(A) 536 (B) 512
(C) 1024 (D) 1048

4. Which is the protocol among the following that is used for translating from physical address
to Internet address?

(A) ICMP
(B) ARP
(C) IGRP
(D)RARP


5. Which property among the ones given below is not possessed by the HTTP protocol?
(A) Non-cached (B) Lightweight
(C) Stateless (D) Application level


6. The port number assigned to FTP protocol is:
(A) 23  (B) 21
(C) 69  (D) 22


7. The protocol used in TCP/IP for dynamic address assignment is :
(A) ARP (B) RARP
(C) DHCP (D) ICMP


8. Which of the following is true about a cross compiler?
(A) It is written in the machine code of one processor and produces code for another
processor
(B) It is used for compiler porting
(C) It may be written in the same language as the one for which it is a compiler of
(D) All of these

9. Which of the following phases of a compiler is not in the backend?
(A) Syntax analysis (B) Intermediate code generation
(C) Code generation (D) Code optimization

10. FORTRAN does not support recursion because:
(A) It does not have pointer data type
(B) It is used for scientific and engineering applications
(C) It uses dynamic allocation
(D) It is not a format free language


11. For a given grammar, which among the following parsing tables are likely to have the most number of states?
(A) SLR
(B) LALR
(C) LR(O)
(D) LR(l)


12. A parsing algorithm used in top down parsing is :
(A) SLR
(B) LL
(C) LR
(D) LALR


13. Which among the following is not used for intermediate code generation?
(A) Quadruples (B) Triples
(C) Syntax trees (D) Parse trees


14. DAG is used in a compiler for:
(A) Intermediate code generation
(B) Code generation
(C) Code optimization
(D) Parsing


15. YACC is a program in UNIX used for:
(A) automatic scanner generation
(B) automatic parser generation
(C) automatic code generation
(D) none of these


16. Which of the following identifiers used in LEX contains the sequence of characters forming a token? 
(A) yylval
(B) yyerror
(C) yytext
(D) yystack


17. Consider the following grammar:
S-> (S) S ->x
Which of the following statements is (are) true?
(i) The grammar is ambiguous
(ii) The grammar is suitable for top-down parsing
(iii) The grammar is suitable for bottom-up parsing

(A) (iii) only
(B) (ii) only
(C) (i) only
(D) (ii) and (iii)


18. Which of the following operations is context free languages not closed under?
(A) Union
(B) Closure
(C) Intersection
(D) Substitution


19. A phenomenon in virtual memory schemes in which the processor spends most of the time swapping pages rather than executing instructions is :
(A) loading
(B) swapping
(C) trashing
(D) aging


20.Which among the following is not a reason for process termination?
(A) Normal termination
(B) Memory unavailable
(C) Protection error
(D) Invalid time



21. Which of the following is (are) true about virtual memory systems that use pages?

(i) The virtual address space can be larger than the amount of physical memory
(ii) Programs must be resident in main memory throughout their execution
(iii) Pages correspond to semantic characteristics of the program.

(A) (i) only 
(B) (ii) only 
(C) (i) and (ii) 
(D) (i) and (iii)

23. Which level of security is implemented in Windows NT?
(A) Al 
(B) Cl
(C) B2 
(D) C2

24. A method of executing two or more programs concurrently using the same computer describe:
(A) multi processing 
(B) multiprogramming
(C) virtual processing 
(D) time sharing


25. Windows is a ------- bit operating system.
(A) 8 
(B) 16
(C) 32 
(D) 64


26. The UNIX shell :
(A) does not come with the rest of the system
(B) forms the interface between the user and the kernal
(C) does not give any scope for programming
(D) does not allow calling one program from with in another


27. The invalid file in UNIX from among the ones given below is:
(A) /bin/unix 
(B) fete/passwd
(C) fete/group 
(D) fusr/bin/vi


28. The very first process created by the Kernal in UNIX is :
(A) init 
(B) getty
(C) fork
(D) none among these


29.A software package that includes two or more applications, such as word processing and
spreadsheets, providing for easy transfer of data between them is best defined as :

(A) software server 
(B) software set 
(C) integrated software package 
(D) application set


30. Which of the following is a software selection criteria?
(A) Appropriateness
(B) Efficiency 
(C) Compatibility
(D) All of the above

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