Threat: It is the action that is dangerous and may misuse a vulnerability which leads to some harmful consequences. Threat may be accidental, intentional or can be an event, circumstance or capability. Vulnerability: In terms of computer security , vulnerability is nothing, but a form of weakness, which can be misused by the attackers or threat actors. Threat actors take advantage of the vulnerabilities to perform the unauthorised acts within a computer system.

Question

[5 marks] Give a recursive definition for the language anb2n where n = 1, 2, 3, ... over the alphabet Ó={a, b}. 2) [12 marks] Consider the following languages over the alphabet ={a ,b}, (i) The language of all words that begin and end an a (ii) The language where every a in a word is immediately followed by at least one b. (a) Express each as a Regular Expression (b) Draw an FA for each language (c) For Language (i), draw a TG using at most 3 states (d) For Language (ii), construct a CFG.

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Chapter 2, Problem 4E

Program Plan Intro

Threat:

It is the action that is dangerous and may misuse a vulnerability which leads to some harmful consequences. Threat may be accidental, intentional or can be an event, circumstance or capability.

Vulnerability:

In terms of computer security, vulnerability is nothing, but a form of weakness, which can be misused by the attackers or threat actors. Threat actors take advantage of the vulnerabilities to perform the unauthorised acts within a computer system.

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[5 marks] Give a recursive definition for the language anb2n where n = 1, 2, 3, ... over the alphabet Ó={a, b}. 2) [12 marks] Consider the following languages over the alphabet ={a ,b}, (i) The language of all words that begin and end an a (ii) The language where every a in a word is immediately followed by at least one b. (a) Express each as a Regular Expression (b) Draw an FA for each language (c) For Language (i), draw a TG using at most 3 states (d) For Language (ii), construct a CFG.

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