Which of the following statements is (are) correct for access controls?
I Access controls limit access to program documentation, data files, programs, and computer hardware.
II Passwords should consist of words that can be found in a common dictionary and should be of a maximum length so that they can be easily remembered.
III. A backdoor is a means of access to a program or system that bypasses normal security mechanisms. Backdoors should be maintained so that there can be quick access to the system or program for emergency situations.
a. I and II only are correct.
b. I only is correct.
c. Ill only is correct.
d. II and III only are correct.
Answer:B
Choice "b" is correct. 
Statement I is the only correct statement. Access controls limH access to program documentation, data files, programs, and computer hardware.
Statement II is incorrect. Passwords should not consist of words that can be found in a common dictionary and should be of a minimum, not a maximum, length.
Statement III is incorrect. A backdoor is a means of access to a program or system that bypasses normal security mechanisms. Backdoors should be eliminated.