Answer Posted / farishta

multi - programming : multiple programs can be run on the
same system
muti tasking : an logical extension of multi pprogramming
to perform multiple task at a same time or at different time

multi user : multiple users can work on time time or
different time
multi processing : multiple jobs by several cpus
timesharing : different tasks can share different rsources

What is the use of the tee command?

1099

---

What command is used to switching between users in unix?

1084

---

What do chgrp command do?

1220

---

What are the commands in UNIX to list the files in a Directory?

1189

---

What are file commands?

1235

---

When i run a programm of orphan process. Instead of getting child's parent (ppid)=1 ..i get 1400 and it varies as per system. How can i findthe right soluion??? My pgm: #include # include int main() { int pid; pid=fork(); if(pid < 0) {exit(-1);} else if(pid==0) { printf("Child Process is Sleeping ..."); sleep(10); printf("Orphan Child's Parent ID : %u ",getppid()); } else { printf("Parent Process Completed ... %u ",getpid()); exit(0); } return 0; } Output:

2272

---

Explain ‘library functions’ with respect to unix commands?

1175

---

What is the use of the command 'ls -x chapter[1-5]' ?

1216

---

Differentiate cmp command from diff command.

1173

---

Explain ‘system calls’ with respect to unix commands?

1097

---

Which command is used to create a directory?

1170

---

Which unix command lists files/folders in alphabetical order?

1764

---

What is unix command line?

1263

---

How do you grep recursively?

1111

---

Who wrote grep?

1071

---