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NEW QUESTION: 1
Which of the following best describes the workings of TextInputFormat?
A. Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the beginning of the broken line.
B. Input file splits may cross line breaks. A line that crosses tile splits is ignored.
C. The input file is split exactly at the line breaks, so each Record Reader will read a series of complete lines.
D. Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReaders of both splits containing the broken line.
E. Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the end of the broken line.
Answer: E
Explanation:
As the Map operation is parallelized the input file set is first split to several pieces called FileSplits. If an individual file is so large that it will affect seek time it will be split to several Splits. The splitting does not know anything about the input file's internal logical structure, for example line-oriented text files are split on arbitrary byte boundaries. Then a new map task is created per FileSplit.
When an individual map task starts it will open a new output writer per configured reduce task. It will then proceed to read its FileSplit using the RecordReader it gets from the specified InputFormat. InputFormat parses the input and generates key-value pairs. InputFormat must also handle records that may be split on the FileSplit boundary. For example TextInputFormat will read the last line of the FileSplit past the split boundary and, when reading other than the first FileSplit, TextInputFormat ignores the content up to the first newline.
Reference:How Map and Reduce operations are actually carried out
http://wiki.apache.org/hadoop/HadoopMapReduce(Map, second paragraph)

NEW QUESTION: 2
企業には、データ設定の一部としてアカウントレコードを作成するさまざまな単体テスト方法があります。新しい必須フィールドがアカウントに追加され、すべての単体テストが失敗します。
開発者が問題を修正するための最適な方法は何ですか？
A. アカウントに挿入前トリガーを追加して、必須フィールドの値を設定します。
B. すべての単体テストのデータ設定に必須フィールドを追加します。
C. 単体テストのアカウントを作成する単一の場所として機能するTestDataFactoryクラスを作成し、そこに必須フィールドを設定します。
D. 必須フィールドを、システム管理者プロファイルを除外する検証ルールに変更します。
Answer: C

NEW QUESTION: 3
You plan to deliver 100 client computers to a customer. The computers will run Windows 8. All of the computers support only Unified Extensible Firmware Interface (UEFI) Class 2.
You need to enable Secure Boot for the computers.
Which UEFI settings on the computers should you modify?
A. Disable support for the compatibility support module (CSM).
B. Disable support for the Trusted Platform Module (TPM).
C. Enable support for the Trusted Platform Module (TPM).
D. Enable support for the compatibility support module (CSM).
Answer: A
Explanation:
Secure Boot is supported for UEFI Class 2 and Class 3 PCs. For UEFI Class 2 PCs, when Secure Boot is enabled, the compatibility support module (CSM) must be disabled so that the PC can only boot authorized, UEFI-based operating systems.

NEW QUESTION: 4
In an IEEE 802.3 Ethernet frame, what is the significance of the DSAP field?
A. The DSAP field is only used on United States Department of Defense networks to indicate the information classification level.
B. The DSAP field indicates the network layer protocol.
C. The DSAP field is only used in Ethernet II frames.
D. The DSAP field specifies the TCP or UDP port that is associated with the transport protocol.
Answer: B