$1.$ What is the primary role of computer design in the field of computing?

A$.$ Writing software applications

B$.$ Enhancing cybersecurity

C$.$ Shaping the capabilities and performance of computing systems

D$.$ Managing data storage

$2.$ What are the primary functions performed by an I$/$O controller in a computer system?

A$.$ Managing memory allocation

B$.$ Handling CPU operations

C$.$ Controlling input and output devices

D$.$ Regulating power consumption

$3.$ Which of the following is NOT a key responsibility of a computer designer?

A$.$ Defining system requirements

B$.$ Selecting appropriate hardware components

C$.$ Writing software code

D$.$ Conducting testing and validation

$4.$ How can cache hit time be reduced in a memory hierarchy design?

A$.$ Increasing cache size

B$.$ Using slower cache memory technology

C$.$ Reducing the number of cache levels

D$.$ Increasing the CPU clock speed

$5.$ What is the primary advantage of virtual memory in a computer system?

A$.$ Reducing CPU cache size

B$.$ Expanding the physical memory capacity

C$.$ Increasing cache hit time

D$.$ Decreasing CPU clock speed