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NEW QUESTION: 1
Which of the following utilities is used to verify the existence of a host in a network?
A. PING
B. NETSTAT
C. CHKDSK
D. IPCONFIG
Answer: A
NEW QUESTION: 2
A Data Scientist is developing a machine learning model to classify whether a financial transaction is fraudulent. The labeled data available for training consists of 100,000 non-fraudulent observations and 1,000 fraudulent observations.
The Data Scientist applies the XGBoost algorithm to the data, resulting in the following confusion matrix when the trained model is applied to a previously unseen validation dataset. The accuracy of the model is
99.1%, but the Data Scientist has been asked to reduce the number of false negatives.
Predicted 0 1
Actual 0 99,966| 34 1 877|123
Which combination of steps should the Data Scientist take to reduce the number of false positive predictions by the model? (Select TWO.)
A. Decrease the XGBoost max_depth parameter because the model is currently overfitting the data.
B. Change the XGBoost eval_metric parameter to optimize based on rmse instead of error.
C. Increase the XGBoost scale_pos_weight parameter to adjust the balance of positive and negative weights.
D. Increase the XGBoost max_depth parameter because the model is currently underfitting the data.
E. Change the XGBoost evaljnetric parameter to optimize based on AUC instead of error.
Answer: B
NEW QUESTION: 3
SysOps管理者には、ビッグデータアプリケーション用にAmazon EBSボリュームタイプが必要です。 アプリケーションデータはまれにしかアクセスされず、順次保存されます。
最も費用対効果の高いソリューションになるEBSボリュームタイプは何ですか?
A. General Purpose SSD (gp2)
B. Provisioned IOPS SSD (io1)
C. Cold HDD (sc1)
D. Throughout Optimized HDD (st1)
Answer: C
Explanation:
Explanation
SC1 is backed by hard disk drives (HDDs) and provides the lowest cost per GB of all EBS volume types. It is ideal for less frequently accessed workloads with large, cold datasets. Similar to st1, sc1 provides a burst model: these volumes can burst up to 80 MB/s per TB, with a baseline throughput of 12 MB/s per TB and a maximum throughput of 250 MB/s per volume. For infrequently accessed data, sc1 provides extremely inexpensive storage. SC1 is designed to deliver the expected throughput performance 99% of the time and has enough I/O credits to support a full-volume scan at the burst rate.
References: https://aws.amazon.com/ebs/features/