UNIX LINUX SYSTEM PROGRAMMING.pdf - Google Drive

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VI Semester B.E. (CSE/ISE) Degree Examination, Dec. 2014/Jan. 2015 (2 K11 Scheme) C164 : UNIX/LINUX SYSTEM PROGRAMMING Time : 3 Hours

Max. Marks :100

Instruction : Answer five full questions choosing atleast two from each Part. PART – A 1. a) Setting standards in the industry is essential, Why ? Discuss your views.

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b) Explain different error status codes in UNIX and POSIX API’s.

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c) Write a program to implement POSIX feature test macros.

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2. a) Discuss file types in UNIX.

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b) Explain, how does Kernel keeps tracks of all files which are open.

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c) Outline the significance of U mask.

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3. a) Explain directory permission setting mechanisms. b) Write a program to display mode number and name of the file and its size. 4. a) Explain process layout in memory. b) Mention the significance of setjmp and longjmp.

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c) Write the prototypes of the following : i) exec ii) fork iii) pipe.

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P.T.O.

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5. a) Explain the significance of exit and wait.

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b) How does unix maintain process accounting ?

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c) Write a program to implement fork API.

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6. a) Who is the mentor for parentless processes ? Give detailed flow. b) Derive the process of network logins. 7. a) What is a signal ? Explain its role in process management. b) Write a sample program to implement.

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i) SGINT ii) SIG CHLD. c) Mention the application of pipe. 8. Write a note on :

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i) Semaphore ii) Client server iii) Record locking mechanisms iv) Message queues.

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