View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 101. Which command can be used to inspect the execution plan of a Spark SQL query? 1) EXPLAIN 2) DESCRIBE HISTORY 3) VACUUM 4) RESTORE Answer: 1) EXPLAIN Explanation: The EXPLAIN command displays information about how Spark plans to execute […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 121. What information does the Delta Change Data Feed provide? 1) Only the current table schema 2) Row-level changes made to a Delta table 3) Spark executor logs 4) Cluster configuration history Answer: 2) Row-level changes made to a Delta […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 141. What is the primary purpose of a streaming checkpoint? 1) Store the progress and state information required for recovery 2) Store the complete source dataset 3) Replace the transaction log 4) Increase notebook memory Answer: 3) Store the progress […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 161. What is the primary purpose of a Databricks workflow job task dependency? 1) Control the execution order between tasks 2) Increase table storage automatically 3) Change column data types 4) Encrypt notebook output Answer: 1) Control the execution order […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 181. What is the primary purpose of a task dependency in a Databricks workflow? 1) To control the order in which tasks execute 2) To increase cluster memory automatically 3) To change the Delta table schema 4) To disable task […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 201. What is the primary purpose of a salting technique when processing skewed join keys? 1) To distribute heavily repeated keys across multiple partitions 2) To remove all duplicate records 3) To convert structured data into JSON 4) To disable […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 221. What is the main purpose of a window function in Spark SQL? 1) To perform calculations across related rows without collapsing them into one row 2) To permanently delete duplicate records 3) To create a new database 4) To […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 241. Which PySpark function should be used to combine DataFrames based on matching column names rather than column positions? 1) union() 2) unionByName() 3) joinByName() 4) mergeByName() Answer: 2) unionByName() Explanation: The unionByName() function combines two DataFrames by matching columns […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 261. Which Spark function is used to rename a column in a DataFrame? 1) renameColumn() 2) withColumnRenamed() 3) changeColumnName() 4) aliasColumn() **Answer: 2) withColumnRenamed() Explanation: The withColumnRenamed() function is used to rename an existing DataFrame column. It accepts the current […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 281. Which Spark SQL function can create an array containing multiple expressions? 1) array() 2) createArray() 3) make_array_column() 4) array_create() Answer: 1) array() Explanation: The array() function creates an array from multiple expressions or columns. It is useful when several […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 301. Which function can generate a unique numeric identifier for rows in a Spark DataFrame without requiring a global sequential sequence? 1) monotonically_increasing_id() 2) row_number() 3) dense_rank() 4) zipWithIndex() Answer: 1) monotonically_increasing_id() Explanation: The monotonically_increasing_id() function generates 64-bit integer values […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 321. Which Spark SQL function returns the number of characters in a string? 1) char_length() 2) string_size() 3) text_length() 4) count_chars() Answer: 1) char_length() Explanation: The char_length() function returns the number of characters contained in a string. It is useful […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 341. Which Spark SQL function splits a string into an array using a specified delimiter? 1) split() 2) string_split() 3) split_string() 4) tokenize() Answer: 1) split() Explanation: The split() function divides a string into an array based on a specified […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 361. Which function sorts the elements of an array in ascending order in Spark SQL? 1) array_sort() 2) array_join() 3) array_except() 4) arrays_zip() Answer: 1) array_sort() Explanation: The array_sort() function sorts the elements within an array and returns a new […]

View Full Databricks Certified Data Engineer Professional Exam Dumps and Practice Test Dumps   Question 381. Which Spark SQL function returns the position of the first occurrence of a substring within a string? 1) instr() 2) substring() 3) locate() 4) regexp_extract() Answer: 1) instr() Explanation: The instr() function searches for a specified substring within a […]