CompTIA A+ Certification Quiz Enhanced 7

What is the primary function of system RAM in a computer?

• To provide persistent storage when the computer is turned off

• To load applications and files

• To handle the graphics and user interface

• To cool down the system components

Answer explanation

To load applications and files

Which type of memory is faster and used for SSDs as compared to traditional HDDs?

• System RAM

• Flash memory

• Virtual memory

• External storage

Answer explanation

Flash memory is faster and used for SSDs compared to traditional HDDs due to its non-volatile nature and faster read/write speeds.

What happens when there is not enough system RAM available for applications?

• The system shuts down automatically

• The CPU's speed is increased to compensate

• Virtual memory is used to extend memory space

• The applications fail to load

Answer explanation

When there is not enough system RAM available for applications, virtual memory is used to extend memory space, allowing the applications to continue running by utilizing disk space as additional memory.

What is virtual memory also referred to as?

• Swap file or swap space

• Backup storage

• Additional RAM

• Secondary cache

Answer explanation

Virtual memory is also referred to as swap file or swap space, allowing the system to use disk space as an extension of RAM when needed.

Why does excessive use of paging in virtual memory slow down the computer?

• Because it increases the CPU temperature

• Because disk transfer rates are slower than RAM transfer rates

• Because it uses more electricity

• Because it reduces the lifespan of the HDD

Answer explanation

Because disk transfer rates are slower than RAM transfer rates

What is the primary function of virtual memory in a computer system?

• To increase the physical size of the RAM

• To serve as a temporary storage for the CPU

• To supplement RAM and protect the operation and integrity of the PC

• To speed up the processing power of the CPU

Answer explanation

To supplement RAM and protect the operation and integrity of the PC

How wide is the data bus in a single channel memory controller configuration typically?

• 32 bits

• 64 bits

• 128 bits

• 256 bits

Answer explanation

In a single channel memory controller configuration, the data bus is typically 64 bits wide, allowing for faster data transfer rates.

What is the maximum addressable memory limit for a 32-bit CPU with a 32-bit address bus?

• 2 GB

• 4 GB

• 16 exabytes

• 256 terabytes

Answer explanation

The maximum addressable memory limit for a 32-bit CPU with a 32-bit address bus is 4 GB, as each bit in the address bus doubles the memory capacity, resulting in 2^32 = 4 GB.

Which type of RAM is described as storing each data bit as an electrical charge within a single bit cell?

• Static RAM

• Dynamic RAM

• Flash Memory

• ROM

Answer explanation

Dynamic RAM stores each data bit as an electrical charge within a single bit cell, distinguishing it from other types of RAM like Static RAM, Flash Memory, and ROM.

What is the primary reason Synchronous DRAM (SDRAM) is referred to as such?

• It operates independently of the motherboard system clock.

• It is not synchronized with any clock.

• Its speed is synchronized to the motherboard system clock.

• It uses a different clock than the motherboard.

Answer explanation

Its speed is synchronized to the motherboard system clock.