Computer Knowledge · General Awareness

Information Security

4,143 Questions

Information security involves protecting computer systems and data from unauthorized access, cyber threats, and damage. It is a core part of the computer knowledge section in various banking and government exams. Practicing these concepts helps in understanding digital signatures, network security, and access control effectively.

Cybersecurity threatsAccess controlCryptography basicsSecurity risk managementDatabase protection

Information Security Questions

Multiple choice

Using public key cryptography, X adds a digital signature $\sigma$to message M, encrypts <M, $\sigma$>, and sends it to Y, where it is decrypted. Which one of the following sequences of keys is used for the operations?

  1. Encryption: X’s private key followed by Y’s private key; Decryption: X’s public key followed by Y’s public key

  2. Encryption: X’s private key followed by Y’s public key; Decryption: X’s public key followed by Y’s private key

  3. Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public key followed by X’s private key

  4. Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private key followed by X’s public key
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Multiple choice

Dynamic linking can cause security concern because

  1. security is dynamic

  2. path for searching dynamic libraries is not known till runtime

  3. linking is insecure

  4. cryptographic procedures are not available for dynamic linking
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Static Linking and Static Libraries is the result of the linker making copy of all used library functions to the executable file. Static Linking creates larger binary files, and need more space on disk and main memory. Examples of static libraries (libraries which are statically linked) are, .a files in Linux and .lib files in Windows. Dynamic linking and Dynamic Libraries Dynamic Linking doesn’t require the code to be copied, it is done by just placing name of the library in the binary file. The actual linking happens when the program is run, when both the binary file and the library are in memory. Examples of Dynamic libraries (libraries which are linked at run-time) are, .so in Linux and .dll in Windows. In Dynamic Linking,the path for searching dynamic libraries is not known till runtime

Multiple choice

___________ is the software that establishes a barrier between trusted network and untrusted network, and is generally used as a network security tool.

  1. Firefox

  2. Firewall

  3. Switch

  4. Router

  5. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Firewall acts as a barrier between a trusted network & untrusted network through which we can prevent unauthorized access into the trusted network. Every system has its own firewall which prevents unauthorized access of other users into our system.This option is correct.

Multiple choice

Which of the following is an electronic document issued by the Certificate Authority (CA), generally used for authentication and verification of a website?

  1. Http cookie

  2. One Time Password (OTP)

  3. Digital certificate

  4. Message Authentication Code (MAC)

  5. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This also called as public key certificate issued by Certificate Authority (CA) and is an electronic document which authenticates and verifies a website, etc. is not malicious or not fake.

This option is true.