Open Source Technologies - Dec 2016

Information Technology (Semester 5)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1(a) Explain backup commands in Linux.(5 marks) 1(b) Describe role in init signal.(5 marks) 1(c) Explain permissions on directory and files.(5 marks) 1(d) Describe 'Anroid Manifest.xml' file components.(5 marks) 2(a) What is daemon process. Name any five daemon processes. Explain working of any two in details.(10 marks) 2(b) What is an Activity? How is it created? Draw and explain activity life cycle.(10 marks) 3(a) What is process? Mention briefly the role of fork-exec mechanism in fork creation.(10 marks) 3(b) Explain with example usage of given commands-grep,
tr,
cat,
sort,
export.(10 marks) 4(a) Explain networking commands-nslookup,
traceroute,
host,
ping,
ifconfig.(10 marks) 4(b) What is data persistency in Android(10 marks) 5(a) Discuss significance of given files-/etc/passwd,
etc/shadow,
/etc/group,
/etc/gshadow(10 marks) 5(b) Draw hierarchical structure of Linux File system and explain ay five directories.(10 marks) 6(a) Explain various open source software licences.(10 marks) 6(b) Write is shell programming? Write a shell that will sequentially clear screen, print only name of current directory, display name of all currently logged in users.(10 marks)