Which Java code snippet correctly initializes a SequenceFile.Writer to write key-value pairs in Hadoop?

easy📝 Syntax Q3 of 15

Hadoop - Performance Tuning

ASequenceFile.Writer writer = SequenceFile.createWriter(conf, SequenceFile.Writer.file(path), SequenceFile.Writer.keyClass(Text.class), SequenceFile.Writer.valueClass(BytesWritable.class));

BSequenceFile.Writer writer = new SequenceFile.Writer(path, Text.class, BytesWritable.class);

CSequenceFile.Writer writer = SequenceFile.createWriter(path, conf, Text.class, BytesWritable.class);

DSequenceFile.Writer writer = SequenceFile.createWriter(conf, path, Text.class, BytesWritable.class);

Step-by-Step Solution

Solution:

Step 1: Review SequenceFile.Writer creation
The modern API uses builder pattern with options like file(), keyClass(), and valueClass().
Step 2: Identify correct syntax
SequenceFile.Writer writer = SequenceFile.createWriter(conf, SequenceFile.Writer.file(path), SequenceFile.Writer.keyClass(Text.class), SequenceFile.Writer.valueClass(BytesWritable.class)); correctly uses SequenceFile.createWriter with configuration and options.
Final Answer:
SequenceFile.Writer writer = SequenceFile.createWriter(conf, SequenceFile.Writer.file(path), SequenceFile.Writer.keyClass(Text.class), SequenceFile.Writer.valueClass(BytesWritable.class)); -> Option A
Quick Check:
Use builder pattern with createWriter [OK]

Quick Trick: Use builder pattern with createWriter [OK]

Common Mistakes:

Using deprecated constructors
Passing parameters in wrong order
Omitting configuration object

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Which Java code snippet correctly initializes a SequenceFile.Writer to write key-value pairs in Hadoop?

Step 1: Review SequenceFile.Writer creation

Step 2: Identify correct syntax

Final Answer:

Quick Check:

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