Computer Systems & Security

Which of the following best describes the function of the Control Unit in a CPU?

• Performs logical comparisons and arithmetic operations

• Directs the operation of the processor by interpreting instructions

• Manages access to secondary memory

• Transfers data to output devices

In computer architecture, which memory component provides the fastest access to data?

• ROM

• RAM

• Registers

• Cache

Which of the following best illustrates a function of the Operating System’s device management?

• Allocating printer access in a multi-user environment

• Sorting files alphabetically

• Encrypting user data

• Installing antivirus

The reason why RAM is considered volatile is:

• It stores permanent data

• It cannot be erased

• It loses data when power is turned off

• It encrypts all stored content

Why is cache memory important in modern CPUs?

• It stores frequently accessed data to reduce average access time

• It serves as a backup for secondary memory

• It increases the size of RAM

• It replaces the need for registers

Which of the following is not directly accessible by the CPU?

• RAM

• SSD

• Cache

• Registers

Which HTTP disadvantage exposes users to data interception risks?

• It transmits data in plaintext without encryption

• It requires a certificate to function

• It slows down network traffic

• It hides the source IP address

Which of the following best defines a Denial of Service (DoS) attack?

• Overloading a service to make it unavailable to legitimate users

• Encrypting user data for ransom

• Phishing via malicious links

• Bypassing authentication systems

Which of the following cookies tracks previously authenticated sessions?

• Auto-fill cookie

• Authentication cookie

• Session cookie

• Zombie cookie

What role does a compiler play in program execution?

• Translates line-by-line and executes

• Manages memory allocation

• Converts entire high-level source code into machine code

• Encrypts the code