Linux OS Shell Question: Download Linux Shell PDF

What command would send the output of cmd1 to the input of cmd2?
a) cmd1 | cmd2
b) cmd1 || cmd2
c) cmd1 && cmd2
d) cmd1 ; cmd2
e) cmd1 cmd2

a) cmd1 | cmd2

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Functions improves the shell's program-ability significantly, because: a) when we invoke a function, it is already in the shell's memory, therefore a function runs faster than seperate scripts b) function provides a piece of code for repetative tasks c) both (a) and (b) d) none of the mentioned	Parameters can be passed to a function: a) by using the parameter variables $1, $2, $3……. b) by using the environment variables c) both (a) and (b) d) none of the mentioned