Linux OS Shell Question: Which command can be used to test various file attributes: a) if b) file c) test d) type Linux Shell Interview QuestionAnswer: c) test Previous QuestionNext QuestionThe $ variables in a shell script context designates: a) The runtime of the script b) Number of command line arguments c) PID of the shell running the script d) The exit status of the shell scriptWhich of the following file set in the current directory are identified by the regular expression a?b*? a) afcc, aabb b) aabb, axbc c) abbb, abxy d) abcd, axbb