Tag: operating systems

1 Run with root user

2 Run with &

3 Run with root user using &

4 None

1 They never releases the memory utilized

2 They release the memory but kernel does not use them

3 Since they are running

4 It’s a false statement

1 Its not possible

2 use isused() function

3 Try to open file with locking enabled

4 Try to write the file after opening

1 Use filelock()

2 use lockfile()

3 Use lockfd()

4 use fcntl()

1 Use ls -l

2 Use sizeof()

3 Use filesize()

4 Use fstat()

1 Use getmemory()

2 Use sysctl()

3 Use freemem()

4 Use malloc()

1 A port to connect printer 2

A port to connect keyboard

3 An abstraction to pass data across processes

4 A hardware device

1 A mechanism to share non-sharable resources

2 A mechanism to access memory very fast

3 A mechanism to access kernel details

4 None

1 A printer queue

2 An IPC mechanism with destructive execute

3 An IPC mechanism with destructive write

4 An IPC mechanism with destructive read

No differences

2 IPC mechanism vs Non-IPC mechanism

3 Non-destructive read vs destructive read

4 Destructive read vs non-destructive read