Which of the following commands is used to absolutely assign all permissions to the owner, read and write permissions to the group and only executable permission to the others of the file note?

Consider the following statements : (a) UNIX provides three types of permissions * Read * Write * Execute (b) UNIX provides three sets of permissions * permission for owner * permission for group * permission for others Which of the above statement/s is/are true ?

A

Only (a)

B

Only (b)

C

Both (a) and (b)

D

Neither (a) nor (b)

Consider the following partial Schedule S involving two transactions T1 and T2. Only the read and the write operations have been shown. The read operation on data item P is denoted by read(P) and the write operation on data item P is denoted by write(P) Time Instance Transaction-id T1 T2 1 read(A) 2 write(A) 3 read(C) 4 write(C) 5 read(B) 6 write(B) 7 read(A) 8 Commit 9 read(B) Schedule S Suppose that the transaction T1 fails immediately after time instance 9. Which one of the following statements is correct?

A

T2 must be aborted and then both T1 and T2 must be re-started to ensure transaction atomicity

B

Schedule S is non-recoverable and cannot ensure transaction atomicity

C

Only T2 must be aborted and then re-started to ensure transaction atomicity

D

Schedule S is recoverable and can ensure atomicity and nothing else needs to be done

Which command is used with file named 'note' to remove the executable permission from the user and assign read permission to the group and others?

A

chmod u-x, go+r note

B

chmod go+r, u+x note

C

chmod g-x, uo+r note

D

chmod go+x, u-x note

E

None of the above

A file owner does not have a permission to edit the file but the group to which the file owner belong do have the permission to edit it. Can owner edit the file?

A

Yes

B

No

C

Cannot be defined

D

Error will be encountered

Which of the following commands is used to assign executable permission to the owner of the file named "note"?

A

chmod g+x note

B

chmod u+w note

C

chmod u+x note

D

chmod ugo+x note

E

None of the above

What command is used with file named 'letter' to remove the executable permission from the user and assign read permission to the group and others?

A

chmod go + x, u - x letter

B

chmod g - x, uo + r letter

C

chmod go + r, u + x letter

D

chmod u - x, go + r letter

E

None of the above

Which of these commands will set the permissions on file textfile to read and write for the owner, read for the group, and nothing for everyone else?

A

chmod 046 textfile

B

chmod 640 textfile

C

chmod 310 textfile

D

chmod rw r nil textfile

The Octal number to be given alogn with chmod command to make a file readable, writable and executable to the owner, readable and executable to group and others is:

A

0

B

755

C

744

D

555

E

None of the above

What command is used to assign executable permission to the owner of the file named "letter"?

A

chmod ugo + x letter

B

chmod u + x letter

C

chmod u + w letter

D

chmod g + x letter

E

None of the above

If a file has read and write permissions for the owner, then the octal representation of the permissions will be

A

1

B

6

C

5

D

3

E

None of the above

Which of the following commands is used to absolutely assign all permissions to the owner, read and write permissions to the group and only executable permission to the others of the file note?

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