BSCS Computer Security and Cybersecurity

Question 1

Which of the following best describes the CIA triad in information security?

Accepted Answer

Confidentiality, Integrity, Availability

Answer

Control, Identification, Authorization

Answer

Cryptography, Intrusion, Authentication

Answer

Configuration, Implementation, Access

Question 2

In symmetric encryption, which statement is true?

Accepted Answer

The same key is used for both encryption and decryption

Answer

Two different keys are used for encryption and decryption

Answer

No key is needed for decryption

Answer

The public key encrypts and the private key decrypts

Question 3

What type of attack involves an attacker secretly inserting themselves between two communicating parties to intercept or alter messages?

Accepted Answer

Man-in-the-Middle (MITM) attack

Answer

Replay attack

Answer

Denial of Service attack

Answer

SQL injection attack

Question 4

Which hashing algorithm produces a 256-bit digest and is widely used in TLS, digital signatures, and blockchain applications?

Accepted Answer

SHA-256

Answer

MD5

Answer

SHA-1

Answer

DES

Question 5

What is a buffer overflow attack?

Accepted Answer

An attack where input data exceeds a buffer's capacity, potentially overwriting adjacent memory and hijacking execution

Answer

An attack that floods a network with excessive traffic

Answer

An attack that intercepts data packets during transmission

Answer

An attack that repeatedly guesses passwords until one succeeds

Question 6

Which access control model assigns permissions based on a user's job function within an organization?

Accepted Answer

Role-Based Access Control (RBAC)

Answer

Discretionary Access Control (DAC)

Answer

Mandatory Access Control (MAC)

Answer

Attribute-Based Access Control (ABAC)

Question 7

What is the primary purpose of a digital signature?

Accepted Answer

To verify the sender's identity and ensure the message has not been altered

Answer

To encrypt the full message content for confidentiality

Answer

To compress the message for faster transmission

Answer

To hide the recipient's identity from network observers