To change the priority of a running job in JCL, you can use the _______ command.
- ADJUST
- ALTER
- CHANGE
- MODIFY
The ALTER command is used to change the priority of a running job
As a JCL expert, you are tasked with optimizing a job scheduling process that involves intricate dependencies. What strategies and best practices would you apply to enhance the efficiency of job execution?
- Adjusting job priorities
- Employing resource optimization techniques
- Parallelizing job steps
- Using conditional processing
Optimizing a job scheduling process involves strategies like parallelizing job steps, using conditional processing, adjusting priorities, and employing resource optimization techniques. Implementing these best practices enhances the efficiency of job execution in a complex and dependent environment.
When is the PEND statement typically used in a JCL job?
- After each EXEC statement
- At the beginning of a job
- At the end of a job step
- Before the JOB statement
The PEND statement is typically used at the end of a job step in JCL
When is the SET statement processed during the JCL execution flow?
- After the execution of EXEC statement
- After the execution of JOB statement
- At the beginning of the execution
- At the end of the execution
The SET statement is processed at the beginning of the execution
The job dependency parameter used to specify a job that must complete successfully before the current job starts is _______.
- AFTER_JOB
- DEPENDENCY_JOB
- PREDECESSOR_JOB
- PREVIOUS_JOB
The correct parameter is PREDECESSOR_JOB, indicating a job that must complete successfully before the current job starts.
To receive notifications about the status of a job, you can use the _______ parameter in the JOB statement.
- ALERT
- MONITOR
- NOTIFY
- STATUS
The NOTIFY parameter in the JOB statement is used to receive job status notifications
You encounter a situation where the BLKSIZE of a dataset needs to be adjusted for better performance. Describe the steps you would take to determine the optimal BLKSIZE value for the dataset.
- All of the above options
- Analyze existing workload and access patterns
- Consult with storage and system administrators
- Experiment with different BLKSIZE values
Determining optimal BLKSIZE involves analyzing workload, experimenting with different values, and consulting with relevant parties to strike a balance between I/O efficiency and storage considerations.
What are the potential issues if you do not de-allocate data sets properly in JCL?
- All of the above
- Incorrect output
- Job termination
- Wasting resources
Not properly de-allocating datasets can lead to wasting resources
The _______ parameter in the DSN statement allows you to specify the number of primary and secondary allocation units for a dataset.
- ALLOC
- SPACE
- TRACKS
- UNIT
The SPACE parameter in the DSN statement allows specifying the allocation units for a dataset.
Explain the significance of DISP=NEW in a JCL DD statement, and in what scenarios would you use it?
- Allocate a new dataset with the specified name
- Release a dataset without deleting it
- Reuse an existing dataset with the specified name
- Specify a cataloged dataset
DISP=NEW is used to allocate a new dataset with the specified name, creating it if it does not exist.