Practice Free H13-231_V2.0-ENU Exam Online Questions
During a database stress test on a Kunpeng server, the system kernel logs (dmesg) show repeated "Alignment trap: not handling instruction" errors.
What is the most likely root cause of this log entry?
- A . The physical hard drive sectors are misaligned.
- B . A C/C++ application attempted an unaligned memory access, which the ARM processor rejected and the kernel could not emulate.
- C . The network packets are arriving out of order.
- D . The RAM modules are installed in the wrong DIMM slots.
During software migration, which software allows unmodified x86 Linux binaries to run on ARM64 environments through dynamic binary translation?
- A . QEMU
- B . KVM
- C . ExaGear
- D . Docker
When migrating virtual machines (Live Migration) between Kunpeng servers of different generations in Huawei Cloud Stack (HCS), what must be configured in KVM/QEMU to ensure the guest OS does not crash due to differing CPU features?
- A . Enable CPU Feature Masking (setting a baseline CPU model).
- B . Change the guest OS kernel to 32-bit.
- C . Disable the L3 cache on both host servers.
- D . Force the VM to use an IDE emulated hard drive.
In a Kunpeng server with a NUMA (Non-Uniform Memory Access) architecture, what is the most significant advantage of binding a process to a specific CPU node (Numa node)?
- A . It increases the CPU clock speed (Turbo Boost).
- B . It reduces cross-node memory access latency by utilizing local memory.
- C . It allows the process to consume more disk I/O.
- D . It disables the L3 cache to save power.
Modern Linux kernels have a feature called Auto NUMA Balancing, which periodically unmaps pages and faults them back to move memory closer to the CPU accessing it. For performance-critical databases like openGauss on Kunpeng, what is the best practice regarding this feature?
- A . Set kernel.numa_balancing = 1 to enable it for better performance.
- B . Set kernel.numa_balancing = 0 to disable it, avoiding unpredictable page migration latency spikes.
- C . It cannot be disabled on ARM architectures.
- D . It should only be enabled during the database backup window.
In a highly loaded Kunpeng server, hardware interrupts from a heavily utilized NIC are continuously hitting CPU 0, causing a bottleneck, while CPU 1 through 63 remain idle. Aside from configuring smp_affinity, which openEuler service can be enabled to automatically and dynamically balance these hardware interrupts across all available CPUs?
- A . irqbalance
- B . network-manager
- C . firewalld
- D . systemd-resolved
In the context of Kunpeng virtualization tuning, what is a best practice to prevent virtual machines from competing for CPU cache resources on the same physical host?
- A . Overcommit the CPU ratio to 10:1.
- B . Disable SR-IOV on the physical network adapters.
- C . Implement CPU Pinning (vCPU to pCPU binding) combined with NUMA topology awareness.
- D . Force all VMs to use IDE emulated disk controllers.
When migrating a Spark workload to Kunpeng, which specific open-source component in the Kunpeng Big Data ecosystem is used to accelerate Spark SQL shuffle operations?
- A . OmniOperator / OmniShuffle
- B . HBase
- C . Zookeeper
- D . Kafka
When migrating a relational database to openGauss on Kunpeng, what is a key architectural characteristic of the openGauss database engine that differs from standard PostgreSQL?
- A . It is a NoSQL, document-oriented database.
- B . It utilizes a thread-pool based, single-process multi-threaded architecture to improve high-concurrency performance.
- C . It relies entirely on in-memory storage with no disk persistence capabilities.
- D . It uses a multi-process architecture identical to standard PostgreSQL without modifications.
The Kunpeng Accelerator Engine (KAE) not only supports international cryptographic algorithms like AES and RSA but also heavily optimizes Chinese national standard cryptographic algorithms.
Which of the following algorithms are supported by KAE for hardware acceleration?
- A . MD5 and SHA-1
- B . SM3 and SM4
- C . Blowfish and Twofish
- D . RC4 and DES