10+ Interview Questions and Answers

A pass through query is a SQL statement that is sent directly to a remote database server for processing.

• It is used to execute SQL statements on a remote database server.

• It is composed of a SQL statement and a connection string.

• It is useful for querying large datasets that are stored on a remote server.

• It can improve performance by reducing network traffic.

• Example: SELECT * FROM [ODBC;Driver={SQL Server};Server=myServerAddress;Database=myDataBase;Uid=myUsername;Pwd=myPassword...read more

Without a run statement, the program will not execute any code.

• The program will not run any code written in the main function.

• If there are any functions called within the main function, they will not be executed.

• The program will terminate without any output or error message.

• The absence of a run statement may indicate an incomplete or faulty program.

Merging data sets involves identifying common variables and combining them into a single dataset.

• Identify common variables between the datasets

• Ensure data types are consistent across datasets

• Use a join operation to combine the datasets

• Handle missing or duplicate data appropriately

• Perform data cleaning and preprocessing before merging

• Example: Merging customer data from two different sources based on customer ID

nodup vs nodupkey: nodup removes duplicates based on all variables, nodupkey removes duplicates based on key variables. if vs where: if is used for conditional processing, where is used for subsetting data.

• nodup removes duplicates based on all variables, while nodupkey removes duplicates based on key variables

• if is used for conditional processing within a data step or procedure, while where is used for subsetting data based on a condition

• Example: nodup vs nodupkey - nodup wil...read more

HCM extracts can be obtained through various modes such as BI Publisher, HCM Extracts, and HDL.

• BI Publisher is used for creating custom reports

• HCM Extracts are used for extracting data from HCM modules

• HDL is used for bulk data loading and extraction

I have experience working with Agile methodology.

• Utilized Agile methodology in previous projects

• Participated in daily stand-up meetings

• Worked in sprints to deliver incremental value

SAS has equivalent functions to SQL joins such as merge, join, and concatenate.

• SAS merge function combines two or more datasets based on common variables.

• SAS join function combines two or more datasets based on common variables and can specify the type of join (inner, outer, left, right).

• SAS concatenate function stacks datasets on top of each other.

• Examples: merge dataset1 with dataset2 on variable ID; join dataset1 with dataset2 on variable ID and specify an inner join; conc...read more

if is used for conditional statements, where is used for filtering data in SQL queries.

• if is used in programming languages for conditional statements, where is used in SQL queries for filtering data

• if can be used to execute a block of code based on a condition, where is used to filter rows based on a condition in SQL

• if can be used in various programming languages like Java, Python, etc., where is specific to SQL queries

Understanding the depth of machine learning algorithms and their applications

• Explain the different types of machine learning algorithms such as supervised, unsupervised, and reinforcement learning

• Discuss the importance of hyperparameters tuning in optimizing the performance of ML algorithms

• Provide examples of popular ML algorithms like Random Forest, Support Vector Machines, and Neural Networks