3. six transactions, t1 through t6, are requesting locks in a single-lock-mode system. here is the sequence of lock requests so far: 1. t1: lock a 2. t2: lock b 3. t3: lock c 4. t3: lock a 5. t4: lock d 6. t4: lock b 7. t5: lock e 8. t5: lock c 9. t6: lock f 10. t6: lock b draw the waits-for graph at this time. then, identify from the list below the request that will cause the requesting transaction to roll back. a) t2: lock f b) t1: lock b c) t2: lock a d) t2: lock b

Write the command that can be used to answer the following questions. (hint: try each out on the system to check your results.) a. find all files on the system that have the word test" as part of their filename. b. search the path variable for the pathname to the awk command. c. find all files in the /usr directory and subdirectories that are larger than 50 kilobytes in size. d. find all files in the /usr directory and subdirectories that are less than 70 kilobytes in size. e. find all files in the / directory and subdirectories that are symbolic links. f. find all files in the /var directory and subdirectories that were accessed less than 60 minutes ago. g. find all files in the /var directory and subdirectories that were accessed less than six days ago. h. find all files in the /home directory and subdirectories that are empty. i. find all files in the /etc directory and subdirectories that are owned by the group bin."

Barbara is interested in pursuing a career in the science and math pathway. which qualifications will her reach that goal? a. an advanced knowledge of physics and math b. an advanced knowledge of engineering and math c. an advanced knowledge of physics and robotics an d. advanced knowledge of machinery and math

Which tool could be used to display only rows containing presidents who served two terms