Premium

Mapr (HP) Hadoop Developer Certification Questions and Answers (Dumps and Practice Questions)



Question : The four arguments to the Mapper class represents the input key type, input value type , output key type, and output value type

: The four arguments to the Mapper class represents the input key type, input value type , output key type, and output value type
1. True
2. False

Correct Answer : 1
Explanation:




Question : If the output value of the Mapper is Text, the input value to the Reducer can be LongWritable

: If the output value of the Mapper is Text, the input value to the Reducer can be LongWritable
1. True
2. False

Correct Answer : 2
Explanation:




Question : MapReduce job can be launched both Synchronously or Asynchronously

: MapReduce job can be launched both Synchronously or Asynchronously
1. True
2. False

Correct Answer : 1
Explanation:


Related Questions

Question : Which one of the following statements is true regarding a MapReduce job?
 : Which one of the following statements is true regarding a MapReduce job?
1. The job's Partitioner shuffles and sorts all (key.value) pairs and sends the output to all reducers
2. The default Hash Partitioner sends key value pairs with the same key to the same Reducer
3. Access Mostly Uused Products by 50000+ Subscribers
4. The Mapper must sort its output of (key.value) pairs in descending order based on value


Question : Which best describes what the map method accepts and emits?
 : Which best describes what the map method accepts and emits?
1. It accepts a single key-value pair as input and emits a single key and list of corresponding values as output.
2. It accepts a single key-value pairs as input and can emit only one key-value pair as output.
 3. Access Mostly Uused Products by 50000+ Subscribers
4. It accepts a single key-value pairs as input and can emit any number of key-value pair as output, including zero.


Question : You are developing a combiner that takes as input Text keys, IntWritable values, and emits
Text keys, IntWritable values. Which interface should your class implement?

 : You are developing a combiner that takes as input Text keys, IntWritable values, and emits
1. Combiner
2. Mapper
3. Access Mostly Uused Products by 50000+ Subscribers
4. Reducer
5. Combiner


Question : Identify which best defines a SequenceFile?
 : Identify which best defines a SequenceFile?
1. A SequenceFile contains a binary encoding of an arbitrary number of homogeneous Writable objects
2. A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous Writable objects
 3. Access Mostly Uused Products by 50000+ Subscribers
4. A SequenceFile contains a binary encoding of an arbitrary number key-value pairs. Each key must be the same type. Each value must be the same type.


Question : Your client application submits a MapReduce job to your Hadoop cluster. Identify the
Hadoop daemon on which the Hadoop framework will look for an available slot schedule a MapReduce operation.

 : Your client application submits a MapReduce job to your Hadoop cluster. Identify the
1. TaskTracker
2. NameNode
 3. Access Mostly Uused Products by 50000+ Subscribers
4. JobTracker
5. Secondary NameNode


Question : How are keys and values presented and passed to the reducers during a standard sort and shuffle phase of MapReduce?

 : How are keys and values presented and passed to the reducers during a standard sort and shuffle phase of MapReduce?
1. Keys are presented to reducer in sorted order; values for a given key are not sorted.
2. Keys are presented to reducer in sorted order; values for a given key are sorted in ascending order.
 3. Access Mostly Uused Products by 50000+ Subscribers
4. Keys are presented to a reducer in random order; values for a given key are sorted in ascending order.