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Q:

An accepted deadline for a project approaches. However, the project manager realizes only 75% percent of the work has been completed. The project manager then issues a change request. What should the change request authorize?

A) Additional resources using the contingency fund B) Escalation approval to use contingency funding
C) Team overtime to meet schedule D) Corrective action based on causes
 
Answer & Explanation Answer: D) Corrective action based on causes

Explanation:
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Filed Under: PMP Certification

Q:

What’s the difference between md5( ), crc32( ) and sha1( ) crypto on PHP?

Answer The major difference is the length of the hash generated. CRC32 is, evidently, 32 bits, while sha1() returns a 128 bit value, and md5() returns a 160 bit value. This is important when avoiding collisions.
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Subject: PHP

Q:

If the variable $a is equal to 5 and variable $b is equal to character a, what’s the value of $$b?

Answer 100, it’s a reference to existing variable.
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Subject: PHP

Q:

So if md5( ) generates the most secure hash, why would you ever use the less secure crc32( ) and sha1( )?

Answer Crypto usage in PHP is simple, but that doesn’t mean it’s free. First off, depending on the data that you’re encrypting, you might have reasons to store a 32-bit value in the database instead of the 160-bit value to save on space. Second, the more secure the crypto is, the longer is the computation time to deliver the hash value. A high volume site might be significantly slowed down, if frequent md5() generation is required.
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Subject: PHP