C952 Computer Architecture

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Free C952 Computer Architecture Questions

1.

Which of the following types of ports would you typically find on the rear I/O panel of a motherboard?

  • HDMI ports

  • SATA ports

  • USB ports

  • PCIe slots

Explanation

Explanation:

The rear I/O panel of a motherboard provides connectors for external devices and peripherals. Common ports include USB ports for connecting keyboards, mice, and external storage, and HDMI or other video outputs for connecting displays. SATA ports, however, are internal connectors used to attach storage drives inside the case, and PCIe slots are expansion slots on the motherboard for adding graphics cards or other expansion cards. Therefore, USB ports are a typical feature of the rear I/O panel, facilitating user connectivity.

Correct Answer:

USB ports

Why Other Options Are Wrong:

HDMI ports is incorrect because while HDMI ports may also appear on the rear I/O, they are primarily for video output and are not as universally used for general external peripheral connectivity as USB ports.

SATA ports is incorrect because SATA ports are internal connectors used for connecting hard drives and SSDs inside the computer case, not on the rear panel for external devices.

PCIe slots is incorrect because PCIe slots are located on the motherboard itself for expansion cards and are not part of the rear I/O panel accessible for external connections.


2.

Which of the following components is NOT part of the WAMP stack?

 

  • Windows

  • Apache

  • MySQL

  • PostgreSQL

Explanation

Explanation:

The WAMP stack is a software bundle used for web development that includes Windows (operating system), Apache (web server), MySQL (database), and PHP (programming language). PostgreSQL, although a popular relational database management system, is not included in the standard WAMP stack. WAMP specifically relies on MySQL as its database component for storing and managing data.

Correct Answer:

PostgreSQL

Why Other Options Are Wrong:

Windows is incorrect because it forms the “W” in WAMP, representing the operating system component of the stack.

Apache is incorrect because it is the web server in WAMP and is essential for serving web pages and handling HTTP requests.

MySQL is incorrect because it provides the database functionality in WAMP, allowing the stack to store, retrieve, and manage application data.


3.

Which cache configuration will improve overall performance for a program requiring one billion instructions on a 4 GHz processor?

  • Execute at three cycles and at five cycles

  • Execute at four cycles and at five cycles

  • Execute at three cycles and at four cycles

  • Execute at three cycles only

Explanation

Explanation:

Cache configurations with lower cycle times per instruction improve overall performance because each instruction takes fewer clock cycles to execute. In this context, executing instructions at three cycles (and optionally four cycles) is faster than configurations that include five cycles. Therefore, a cache configuration that supports execution at three cycles and four cycles minimizes instruction latency and enhances the performance of a program with one billion instructions. Optimizing cycle times directly reduces total execution time, making this configuration the most effective.

Correct Answer:

Execute at three cycles and at four cycles

Why Other Options Are Wrong:

Execute at three cycles and at five cycles is incorrect because the inclusion of a higher five-cycle instruction increases the average instruction execution time, reducing overall performance compared to configurations limited to three and four cycles.

Execute at four cycles and at five cycles is incorrect because both cycle counts are higher than three cycles, meaning each instruction takes longer, which negatively impacts total program execution time.

Execute at three cycles only is incorrect because while three cycles is optimal, some instructions may inherently require more than three cycles. Limiting the configuration to three cycles may not be realistic for all instructions, and the configuration with three and four cycles better balances performance and instruction requirements.


4.

What is a primary benefit of using a Hybrid Drive (SSHD) compared to a traditional Hard Disk Drive (HDD)?

  • It provides the same performance as a full Solid State Drive (SSD).

  • It offers a larger storage capacity at a lower cost than a full SSD.

  • It has a simpler technology that reduces the risk of failure

  • It operates solely on SSD technology for faster data access

Explanation

Explanation:

A Hybrid Drive (SSHD) combines a traditional hard disk drive (HDD) with a small amount of solid-state drive (SSD) memory. This allows frequently accessed data to be stored in the SSD portion, improving read and write performance compared to a standard HDD. At the same time, it maintains the large storage capacity and lower cost of an HDD. The primary benefit of an SSHD is this balance between improved performance for common tasks and cost-effective high-capacity storage, without fully relying on expensive SSDs.

Correct Answer:

It offers a larger storage capacity at a lower cost than a full SSD.

Why Other Options Are Wrong:

It provides the same performance as a full Solid State Drive (SSD) is incorrect because an SSHD cannot match the performance of a full SSD; only part of the drive is solid-state, so overall speed improvements are limited.

It has a simpler technology that reduces the risk of failure is incorrect because SSHDs combine two types of storage, making them more complex than standard HDDs, not simpler.

It operates solely on SSD technology for faster data access is incorrect because SSHDs still rely on a mechanical HDD for the majority of storage; they do not operate entirely on SSD technology.


5.

Which locality principle states that if a data location is referenced, it will tend to be referenced again soon?

  • Spatial

  • Residual

  • Canonical

  • Temporal

Explanation

Explanation:

The temporal locality principle refers to the tendency for a recently accessed data location to be accessed again in the near future. This principle underlies caching strategies and memory hierarchies in computer systems, where recently used data is kept in faster, more accessible storage to reduce access time. Temporal locality is fundamental in predicting which data should remain in cache, optimizing performance, and minimizing repeated memory fetches. In contrast, other forms of locality, such as spatial locality, relate to accessing nearby memory locations rather than revisiting the same location.

Correct Answer:

Temporal

Why Other Options Are Wrong:

Spatial is incorrect because spatial locality refers to accessing memory locations that are physically near previously accessed locations, not the same location being accessed repeatedly.

Residual is incorrect because this term does not describe a standard locality principle in computer architecture. It has no relevance to memory access patterns or caching strategies.

Canonical is incorrect because canonical locality is not a recognized principle in memory hierarchy or caching theory. It does not relate to repeated data access.


6.

Which instruction in the ARM architecture excludes a carry value after arithmetic calculations?

  • Long multiplies

  • Reverse subtract

  • No divide

  • Conditional trap

Explanation

Explanation:

In ARM architecture, the reverse subtract instruction (RSB) performs subtraction in reverse order and does not update or include the carry flag from previous arithmetic operations. This allows arithmetic calculations where the carry flag is not affected, which can be useful for certain algorithmic operations that require independent subtraction results without influencing the processor’s status flags. The RSB instruction is designed specifically to compute the difference between two values in reverse order while excluding the carry.

Correct Answer:

Reverse subtract

Why Other Options Are Wrong:

Long multiplies is incorrect because long multiply instructions perform multiplication over extended registers and may affect the carry and overflow flags depending on the operation; they do not inherently exclude carry values.

No divide is incorrect because ARM does not have a standard “no divide” instruction, and division operations can impact status flags but are unrelated to carry exclusion in subtraction.

Conditional trap is incorrect because conditional trap instructions are used for exception handling and do not perform arithmetic operations; therefore, they are unrelated to carry values.


7.

What is the primary benefit of implementing pipelining in a CPU architecture?

  • It reduces the overall power consumption of the CPU.

  • It increases the instruction throughput by allowing multiple instructions to be processed simultaneously

  • It simplifies the CPU design by reducing the number of components.

  • It enhances the CPU's ability to execute floating-point operations.

Explanation

Explanation:

Pipelining in CPU architecture allows multiple instructions to be in different stages of execution simultaneously. By overlapping instruction fetch, decode, execute, and write-back stages, pipelining increases instruction throughput without necessarily reducing the execution time of individual instructions. This technique enhances overall CPU efficiency and performance by ensuring that all parts of the processor are utilized continuously.

Correct Answer:

It increases the instruction throughput by allowing multiple instructions to be processed simultaneously.

Why Other Options Are Wrong:

It reduces the overall power consumption of the CPU is incorrect because pipelining may increase power consumption due to more components being active simultaneously.

It simplifies the CPU design by reducing the number of components is incorrect because pipelining actually adds complexity to CPU design, requiring additional control logic to manage instruction flow.

It enhances the CPU's ability to execute floating-point operations is incorrect because pipelining benefits all types of instructions, not specifically floating-point operations.


8.

What role does the CPU socket play in a computer system?

  • It connects the CPU to the motherboard and defines compatibility with specific CPU types.

  • It stores temporary data for the CPU during processing.

  • It manages power distribution to the CPU.

  • It serves as a cooling mechanism for the CPU.

Explanation

Explanation:

The CPU socket is the physical interface on the motherboard that connects the processor to the system. It ensures proper alignment and electrical contact between the CPU pins or pads and the motherboard circuitry. The socket also defines compatibility with specific CPU types, including factors such as pin layout, supported voltages, and chipset features. Without the correct socket, a CPU cannot function in the system, making it essential for proper processor integration.

Correct Answer:

It connects the CPU to the motherboard and defines compatibility with specific CPU types.

Why Other Options Are Wrong:

It stores temporary data for the CPU during processing is incorrect because temporary data storage is handled by CPU registers, caches, and main memory, not the socket.

It manages power distribution to the CPU is incorrect because power regulation is managed by the motherboard’s voltage regulators and power delivery circuits, not by the CPU socket itself.

It serves as a cooling mechanism for the CPU is incorrect because cooling is provided by heat sinks, fans, or liquid cooling systems; the socket only provides mechanical and electrical connections


9.

Which of the following is an example of Infrastructure as a Service (IaaS)?

  • Amazon Web Services (AWS)

  • Salesforce

  • GoToMeeting

  • Google App Engine

Explanation

Explanation:

Amazon Web Services (AWS) is a prime example of Infrastructure as a Service (IaaS) because it provides virtualized computing resources, including servers, storage, and networking, over the internet. Users can provision, manage, and scale these resources as needed without owning physical hardware. Unlike Software as a Service (SaaS) or Platform as a Service (PaaS), IaaS focuses on providing the underlying infrastructure for IT operations, allowing organizations to build and manage their own applications on top of it.

Correct Answer:

Amazon Web Services (AWS)

Why Other Options Are Wrong:

Salesforce is incorrect because it is a Software as a Service (SaaS) platform that provides ready-to-use software applications, not raw infrastructure.

GoToMeeting is incorrect because it is a SaaS product offering online meeting services rather than infrastructure resources

Google App Engine is incorrect because it is a Platform as a Service (PaaS), providing a platform for developing and deploying applications without giving direct control over the underlying infrastructure.


10.

What is an advantage of implementing cloud computing?

  • It offers scheduled scaling

  • It provides local hosting

  • It provides automatic scaling

  • It offers additional services

Explanation

Explanation:

One of the major advantages of cloud computing is automatic scaling, which allows cloud resources to dynamically adjust to changing workloads without manual intervention. When demand increases, additional computational resources are allocated automatically; when demand decreases, resources are scaled down, optimizing cost and performance. This flexibility ensures that applications maintain performance under varying loads while minimizing resource wastage and administrative overhead.

Correct Answer:

It provides automatic scaling

Why Other Options Are Wrong:

It offers scheduled scaling is incorrect because scheduled scaling requires pre-defined adjustments rather than dynamically responding to real-time demand, which is less efficient than automatic scaling.

It provides local hosting is incorrect because cloud computing typically involves remote hosting in data centers, not local on-premises hosting.

It offers additional services is incorrect because while cloud platforms provide various services, the primary performance advantage for scalability and resource management comes from automatic scaling, not simply additional services.


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