Protection and Security Questions

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61.

SHA-1 produces __________ bit of hash.

A

128

B

160

C

150

D

112

Correct Answer: B

None.

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62.

Which two of the following are authentication algorithms?

A

MAC

B

AES

C

DAS

D

Digital-signature

Correct Answer: A

None.

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63.

What is the role of Key Distribution Center?

A

It is used to distribute keys to everyone in world

B

It intended to reduce the risks inherent in exchanging keys

C

All of the mentioned

D

None of the mentioned

Correct Answer: B

None.

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64.

In domain structure what is Access-right equal to?

A

Access-right = object-name, rights-set

B

Access-right = read-name, write-set

C

Access-right = read-name, execute-set

D

Access-right = object-name, execute-set

Correct Answer: A

None.

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65.

What is meaning of right-set?

A

It is a subset consist of read and write

B

It is a subset of all valid operations that can be performed on the object

C

It is a subset consist of read, write and execute

D

None of the mentioned

Correct Answer: B

None.

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66.

What is Domain?

A

Domain = Set of all objects

B

It is a collection of protection policies

C

Domain= set of access-rights

D

None of the mentioned

Correct Answer: C

None.

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67.

What does the access matrix represent?

A

Rows-Domains, Columns-Objects

B

Rows-Objects, Columns-Domains

C

Rows-Access List, Columns-Domains

D

Rows-Domains, Columns-Access list

Correct Answer: A

None.

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68.

What are the three additional operations to change the contents of the access-matrix?

A

copy

B

Owner

C

control

D

all of the mentioned

Correct Answer: D

None.

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69.

Who can add new rights and remove some rights?

A

copy

B

transfer

C

limited copy

D

owner

Correct Answer: D

None.

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70.

What are the three copyrights?

A

copy

B

transfer

C

limited copy

D

all of the mentioned

Correct Answer: D

None.

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