The quick 3 minute SQL quiz a really good tool to test your SQL knowledge. Start trying it today.
In DB2 giving TIMESTAMP is very common and it is so important data type. I have given some popular points on it.
The TDQ in CICS has many advantages. They are two types. Explained why they need in CICS programs
The popular commands I am giving collected based on my experience and other senior developers. The first few commands read here, before you move into next level.
The all about some very basics of ISPF key points, highly useful if you are a new to mainframe ISPF or an existing mainframe programmer. Read more.
CLIST is an interpreted language. CLISTs can be run in background (by running JCL which executes the TSO control program (IKJEFT01)). Read more with examples.
The simple way to split a data set in mainframe using DFSORT. Read more for examples.
COMPUTE in COBOL is the best keyword you can use it in calculation. The syntax explained here simplified way you can use it. Read more.
How and when to use GU and GHU calls is perfectly needed to write logic in IMS DB programs. Read more.
Really the best COBOL tutorial help you go thorough quickly to write programs and prepare for interview.