"Quiz" on introduction to VSAM
1. |
The program is going to read a sequential file and create an indexed file. The file is going to be indexed on CUST-ID. The SELECT statement coded for the VSAM file is: SELECT VSAM-OUTPUT-FILE |
2. |
Where must CUST-ID be defined? |
3. |
Code the WRITE statement to put the record onto the VSAM file. Assume that the 01 name is VSAM-REC. |
4. |
Write the SELECT statement that would be used to sequentially read the VSAM file that was just created. |
5. |
Write the READ statement that would be used to sequentially read the VSAM file that was just created. |
6. |
I want to sequentially start with CUST-ID equal to or greater than the value stored in TRAN-CUST-ID. First I must establish the KEY - write the code to do this? |
7. |
Continuing with #6, now I want to issue the START command. Write the correct code assuming that a successful start means performing B-200-PROC and an unsuccessful start means performing B-210-PROBLEM. |
8. |
If the START is successful, I can immediately start to work with the fields on the first record. TRUE or FALSE and explain. |
9. |
Write the SELECT statement that would be used to randomly read the VSAM file that was created above. |
10. |
Write the READ statement that would be used to randomly read the VSAM file that was created above. |
11. |
Write the SELECT statement that will allow you to read this file both randomly and sequentially within the program. |
12. |
If you want to randomly read a record from the file what must be done to establish the record you want to retrieve? |
13. |
Write the READ statement to randomly read a record from the file. |
14. |
Once you have READ a record randomly, you may now process records sequentially until a condition is met or EOF is reached. Code the READ statement to sequentially read a record in a dynamically accessed indexed file. |
15. |
Now lets assume this file was changes to include an alternate key based on CUST-NAME. Write the new SELECT that would be used to sequentially process this record. |
16. |
Assume that you want to start reading sequentially with the name ASH/SUSAN. Code the statement to locate the first record using sequential access. |
17. |
Continuing from #16, code the statement to READ the record for ASH/SUSAN. |
18. |
Now lets assume that you want to use dynamic access with this file. Code the SELECT statement. |
19. |
Code the statement to randomly read the record for ASH/SUSAN (remember you have dynamic access). |
20. |
Code the statement to sequentially read the next record from the file sequentially (remember you have dynamic access). |