Use getmemory()

Use sysctl()

Use freemem()

Use malloc()

A port to connect printer

A port to connect keyboard

An abstraction to pass data across processes

A hardware device

A mechanism to share non-sharable resources

A mechanism to access memory very fast

A mechanism to access kernel details

None

A printer queue

An IPC mechanism with destructive execute

An IPC mechanism with destructive write

An IPC mechanism with destructive read

No differences

IPC mechanism vs Non-IPC mechanism

Non-destructive read vs destructive read

Destructive read vs non-destructive read

sed 's/ */$//' test1

sed 's/ *$//' test1

sed 's/ *$//' test1

sed 's/ *$\/\/' test1

duplicate()

dup()

cp()

mknod()

Use chshell command

update the file /var/passwd

update the file /etc/users

update the file /etc/passwd

Both are Unix scheduling utilities

at is restricted one and crontab is not restricted

No difference

at takes input from user while cron takes from a confiuration file

mount -t

mount -R

mount

mount -Rt

lpqrm

lprm

jobs -r

lpc -rm

True

False

True

False

True

False

True

False

Add printer and queues

Add modem & flash drive

Add printer alone

Invalid command

select() and poll() have no differences

poll() is event driven while select() is not

select() is event driven while poll() is not

None

The process file name of init

The proc file name of RAM

Invalid file

The core dump file

Resolve by update PATH variable

Resolve by setting SHELLPATH variable

Resolve by updating LD_LIBRARY_PATH

Resolve by setting LIBRARY_PATH variable

True

False