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The ________ is code that recognizes some special sequence of input or is triggered by being run from a certain user ID by an unlikely sequence of events.


1. Trap doors
2. Trojan horse
3. Logic Bomb
4. Virus 

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Correct Answer - Option 1 : Trap doors

The correct answer is Trap doors.

The Trap doors are code that recognizes some special sequence of input or is triggered by being run from a certain user ID by an unlikely sequence of events.

  • Trap Door:
    • A trap door is a secret entry point into a program that allows anyone to gain access to any system without going through the usual security access procedures.
    • It is a method of bypassing normal authentication methods.
    • Hence it is also known as a back door.
    • It is used by the Programmers to debug and test programs. 
    • It can become a threat when any dishonest programmers gain illegal access. 

  • A standalone malicious program that may give full control of an infected PC to another PC is called Trojan horse.
  • A logic bomb is a small code that is intentionally inserted into a software system and will set off a malicious function when specified conditions are met. 
  • A virus is a computer program that can change and replicates itself by modifying other computer programs and inserting its own code. 

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