[Solved] Identify the error in this Lambda architecture pseudocode: batch_result = batch_process(historical_data) speed_result = speed_process(real_time_data) final_output = merge(batch_result + speed_result)... | Hadoop

Hadoop - Modern Data Architecture with Hadoop

Identify the error in this Lambda architecture pseudocode:

batch_result = batch_process(historical_data)
speed_result = speed_process(real_time_data)
final_output = merge(batch_result + speed_result)
return final_output

Aspeed_process should not be called

BIncorrect merge function usage with '+' operator

CMissing batch_process function definition

Dfinal_output should be a list, not a variable

Step-by-Step Solution

Solution:

Step 1: Check merge function usage
merge expects two arguments, but '+' combines lists before merge.
Step 2: Identify correct merge call
Should call merge(batch_result, speed_result) instead of merge(batch_result + speed_result).
Final Answer:
Incorrect merge function usage with '+' operator -> Option B
Quick Check:
Merge needs separate arguments, not combined [OK]

Quick Trick: Use merge(a, b), not merge(a + b) [OK]

Common Mistakes:

Using '+' inside merge
Ignoring function argument requirements
Assuming '+' merges correctly

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More Hadoop Quizzes

Identify the error in this Lambda architecture pseudocode:

Step 1: Check merge function usage

Step 2: Identify correct merge call

Final Answer:

Quick Check:

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