1: In "more", what does the space bar do? Nothing; causes an error. O Moves down one line. O Moves down one-half screenful. O Moves down one screenful. O Deletes the current screenful from the file. 2: What would the command "tr 0-9 A-Z do? O Pass the input unchanged. O Convert any lower-case letters on the input to upper-case letters. Convert any upper-case letters on the input to lower-case letters. Convert any digits on the input to upper-case letters. O Convert any digits on the input to lower-case letters. 3: What does "head" do? Shows only the first few lines of output of a command, or a file. O Selects some lines from the input to pass to the output. O Shows only the last few lines of output. Re-arranges input lines. Individually edits each line of input. 4: What does "sort" do? Transforms input characters before passing them to output. O None of the other answers is correct. O Shows only the first few lines of output. Breaks up lots of output into page-size chunks. O Re-arranges input lines, putting them in order. 5: Which filter does character transformation? Otr O sed more head Otail 6: What would the command 'tr A-Z a-z' do? Convert any lower-case letters on the input to upper-case letters. Convert any numbers on the input to lower-case letters. Pass the input unchanged. O None of the other answers is correct. O Convert any upper-case letters on the input to lower-case letters. 7: Which filter gives only the beginning of some output? O head O more Ogrep O tail O sort 8: Which sort key below specifies the first field on a line? O None of the other answers is correct. O Cannot be done. O+A O-k1,1 O+1 9: Which filter gives only the end of some output? O sed O tail Otr more Osort 10: Which command, placed at the end of a pipeline, will show the first 25 lines of the output? O None of the other answers is correct. O head +26-50 O head +25-50 O head +25tail -25 O head -25