Q. What does the Map function do in a MapReduce program?

View solution

Q. How are the output records of the Map function partitioned in MapReduce?

View solution

Q. What is the primary advantage of using MapReduce for massive data processing?

View solution

Q. What is the purpose of the MapReduce scheduler in a distributed processing framework?

View solution

Q. How many output files are typically produced by each Map function instance in MapReduce?

View solution

Q. What is the primary purpose of the Reduce phase in a MapReduce program?

View solution

Q. What determines which Reduce instance consumes output records with the same hash value from the Map phase?

View solution

Q. What is the purpose of the MapReduce main controller?

View solution

Q. What is the typical implementation of PageRank using MapReduce?

View solution

Q. What is one of the key advantages of MapReduce?

View solution

Q. How does the MapReduce program handle output records with the same hash value?

View solution

Q. What is the role of the control program in the implementation of PageRank using MapReduce?

View solution

Q. What characteristic of MapReduce contributes to its high fault tolerance?

View solution

Q. What is the typical number of Reduce instances in a MapReduce program?

View solution

Q. What is the primary function of the MapReduce scheduler?

View solution

Q. What are the two crucial aspects that enable parallel execution in database systems?

View solution

Q. What does the optimizer in a parallel DBMS translate SQL commands into?

View solution

Q. In a parallel DBMS, when does the filter subquery in a SQL command get performed in parallel?

View solution

Q. What is the final step required in a parallel DBMS after performing a hash join and calculating preliminary aggregate functions?

View solution

Q. Why is there a need for interfaces between MapReduce systems and DBMSs?

View solution