1 . Which one of the following is true about firewalls?

• A. It filters network traffic
• B. It can be either a hardware or software device
• C. It follows a set of rules
• D. All of these
• D. None of these

Answer: Option D

Explanation:

2 . Karim has more books than Rahim but less than Hasan, If the numbers of books that Karim, Rahim and Hasan have respectively are p, q and r, then which one of the following is true?

• A. r
• B. p
• C. q
• D. q

Answer: Option C

Explanation:

3 . Which one of the following is true?

• A. Bangladesh is a lower middle-income country.
• B. Bangladesh is an upper middle-income country.
• C. Bangladesh is a low-income country.
• D. Bangladesh is a high-income country.

Answer: Option A

Explanation: