The correct code snippet is option E. The code uses the OUTPUT statement to output only those observations where the Salary is greater than 100000 and the Department is 'IT. The code uses the 'if statement with the 'and' operator to check both conditions. Options A, B, C, and D are incorrect. Options A and B are incorrect because they only check one condition at a time. Option C is incorrect because it checks the conditions separately, and not together. Option D is incorrect because it outputs an observation for each condition separately not together The correct syntax for the OUTPUT statement is 'output dataset_name;'.

The correct statement is "PROC SORT DATA-CUSTOMERS OUT-CUSTOMERS_SORTED; BY CITY, ZIP_CODE DESCENDING; RUN;". This sorts the dataset by 'CITY in ascending order (default) and then within each city sorts the 'ZIP_CODE' in descending order.

Option A is correct as it uses the 'style' option to reference the custom style sheet and 'file' option to specify the output PDF file. Option D is also correct because the PROC REPORT procedure is more flexible for creating complex reports with a custom style sheet. Option B is incorrect because the 'nooverflow' option is not necessary for custom formatting and logo placement. Option C is incorrect because it tries to use ODS graphics which is not needed for the specified task. Option E is incorrect because it disables the report title and doesn't incorporate the custom style.

The 'FIRSTOBS and 'OBS' options allow you to specify the start and end row numbers for each chunk. This allows you to import the file in smaller sections, reducing memory pressure. The other options are not relevant for efficient chunk-wise import: SOUT=dataset' specifies the output dataset name, and 'REPLACE-YES are used for file type and overwriting datasets, is for data type guessing, and 'DELIMITER' is for specifying the field delimiter. The 'FIRSTOBS and SOBS' options are the key to efficient chunk-wise data import.

"LIBNAME SAS DATA '/home/data/customer_data' SERVER=server_name; The SERVER option in the LIBNAME statement allows you to specify the remote server hosting the SAS dataset.
The path '/home/data/customer_data' refers to the location of the dataset on that server. This is essential for accessing remote datasets within the SAS environment. Option A is incorrect as it doesn't specify a server, so it would attempt to access the dataset really. Option B is incorrect because it uses the USER and PASSWORD options which are typically for connecting to a SAS server but not the directory of the data. Option C is incorrect because it is not the correct method of defining a remote server connection. Option E is incorrect because the server name should be explicitly specified using the SERVER keyword.