Review Questions Set 2
What is a partitioned dataset?
A PDS is a collection of sequential datasets called members.
What are the three main objectives of system security? Integrity, availability, and malware Confidentiality, integrity, and quality Integrity, quality, and ascendancy Confidentiality, integrity, and availability
Answer: Confidentiality, integrity, and availability
A programmer has 40 sequential data sets. The 40 datasets collectively represent a program that will be used by a business. Which z/OS dataset type should the programmer use to store the datasets? A) 40 sequential files B) Four PDS datasets each with ten members C) 20 sequential files D) A VSAM KSDS E) One PDS
Correct answer(s): E
A z/OS catalog is: A) A place to store free space information B) A collection of VTOCs C) A dataset used to store information about z/OS users D) A collection of extents E) A dataset used to store location information about other datasets
Correct answer(s): E
Two common z/OS units of work are: A) SMTs and tasks B) SRBs and ENQs C) Tasks and SLOTs D) SRBs and PSWs E) Tasks and SRBs
Correct answer(s): E
What is a DASD volume?
Datasets in Z/OS are organized into DASD volumes. They are used of storing datasets.
What is a library in z/OS?
A library refers to a PDS or a PDSE.
What's the most accurate definition of a Network Interface Card (NIC)? A NIC controls the flow of information from the IP to the TCP, over hardware and software. A NIC moves information directly from the computer to computers on the internet. A NIC comprises of the hardware and software components that connects the RJ-15 cable to the RJ-45 A NIC is a computer hardware component that connects a computer to a network.
Answer: A NIC is a computer hardware component that connects a computer to a network.
What is the best definition of an address space? Is the actual physical memory Is addressable data storage not currently in a computer's main memory Appears to exist as main storage, although most of it is held in secondary storage A map of storage available to applications and users
Answer: A map of storage available to applications and users
What takes source code and compiles it into machine language? Programming Object code Language code Compilers
Answer: Compilers
Which of the following provides the ability to allow users on multiple systems to access data sets on shared DASD volumes? TSO GRS LPAR XCF
Answer: GRS
What does GDPS stand for? Geographically Dispersed Parallel Sysplex Graphic DiPlo Sysplex Geomegric Duplicity Parallel Sysplex
Answer: Geographically Dispersed Parallel Sysplex
What is the difference between master and user catalog?
A master catalog stores catalog information of dataset system dataset and aliases for user catalogs. user catalogs store catalog information of user datasets.
Architecture is comprised of: Hardware and firmware Hardware and operating systems Software and firmware Software and hardware
Answer: Software and hardware
What z/OS interface enables programs to use authorization services to control access to resources? Application programming interfaces Extensible Markup Language System management interface System authorization facility
Answer: System authorization facility
Applications running on an operating system through a simplified series of interfaces is referred to as Application programming interfaces False True
Answer: True
All of the data that can be read or written without moving all of the read/write heads of a disk device (DASD) is referred to as: A) Volume B) Circle C) Cylinder D) Cartridge E) Track
Correct answer(s): C
If a fixed block physical is 1000 bytes long and the records are recorded in blocks of 10, how long is each fixed length record (i.e. what is the logical record length)? A) 50 bytes B) 1010 bytes C) 100 bytes D) 10,000 bytes E) Can't tell with the information provided
Correct answer(s): C
Many z/OS system programmers who have worked with z/OS for a long time still refer to it using its original (old) name: A) MFT B) RAS C) MVS D) SRB E) VSE
Correct answer(s): C
Typical z/OS "middleware" would include A) End user application programs B) z/OS itself C) Java SDK D) auxiliary storage E) Database software and web server software
Correct answer(s): E
What is a dataset? What types of data sets are used on z/os?
Dataset refers to a file that contains one or more records. A record is the basic unit of information used by a program running on z/OS. Types of datasets: (1) Partition Dataset (PD and PD-E) (2) Sequential Dataset (SD and SD-E) (3) VSAM
How are dataset named in z/OS.
Each dataset name is unique which is up to 44 chars. A dataset name consists of segments names also called level qualifier. The first segment is called the HLQ (high level qualifier), and last segment is called LLQ (low level qualifier). Each name is 1 to 8 characters long. Each name must begin with a character A-Z or @, #, or $ followed by zero or more characters, numbers, or hyphens. All names have only upper case letters.
What is a sequential dataset?
It is a data structure for storing data in z/os. It consists of one or more records.
What are the various VSAM datasets?
Key Sequenced Datasets, Entry Sequenced datasets, Relative Record sequenced dataset, and Linear Datasets.
What is a PDSE?
PDSE is a partitioned dataset extended which basically the same as PDS with additional functionality to expand or remove storage space as needed.
How are VSAM files stored?
They are stored in control intervals consisting of one or more records.
What is the difference between a UNIX file and Z/OS dataset?
Unix files are store as text files or binary files. Text files are sequence of bytes separated by carriage return. Binary files are stored as a sequence of binary words. In Z/OS, datasets are stored as logical records. Executable modules are stored undefined records.
What is the minimum number of LPARs in a Sysplex? 2 32 16 1
Answer: 1
What is the maximum number of z/OS images in a Parallel Sysplex environment? 10 32 8 16
Answer: 32
Which is the best definition of a console as it pertains to Mainframe? A collection of optional software features, with a web-browser interface, that is used for configuring, managing, and monitoring data-copy functions. A user interface to a server, for example, the interface provided on a personal computer. A screen that resides within the computer.
Answer: A user interface to a server, for example, the interface provided on a personal computer.
A processor unit (PU) is an un-characterized processor in a mainframe. Which characterized processor executes commands? SAP (System assistance processor) zIIP (Integrated information processor) zAAP (z Application assist processor) CP (Central processor)
Answer: CP (Central processor)
Which z/OS component manages communications between applications in a Parallel Sysplex? TCP/IP Cross-system coupling facility Hipersockets VTAM
Answer: Cross-system coupling facility
What's the best definition of an LDAP? Defines a standard method to access and update information in a directory. A semiconductor chip that displays visible or infrared light when activated. A set of system commands, library routines, and other tools that allow the user to establish and control logical volume storage.
Answer: Defines a standard method to access and update information in a directory.
Which of these provides a common set of methods for performing functions which the operating system is going to utilize? Software Firmware Hardware Operating System
Answer: Firmware
Which of the following are examples of application software? Inventory jobs Memory components Operating Systems Program products
Answer: Inventory jobs
What is the name of software that enables hardware on a mainframe? LMC (Licensed machine code) PR/SM (Processor resource/system manager) LIC (Licensed internal code) PDF (Program development facility)
Answer: LMC (Licensed machine code)
What term is used when the operating system moves data from auxiliary storage to central storage? Retrieving Paging Passing Relocating
Answer: Paging
In TSO/ISPF, what is the name of a data set which contains multiple members, each of which holds a sub-data set? Sub data set Sequential data set Member data set Partitioned data set
Answer: Partitioned data set
What is the status of the management process state when a process is waiting on the processor to handle the request? Holding Ready New Running
Answer: Ready
Which system component decides the allocation of system resources? Performance manager Resource manager Resource director Resource handler
Answer: Resource manager
Which mainframe component syncs the time of day between multiple servers? Sync element Server time protocol Server connect Sysplex timer
Answer: Server time protocol
RACF question: What's the initial security request flow for a user request assuming RACF? User request-> Resource Manager-> SAF-> RACF->RACF Database User request-> SAF-> RACF->RACF Database User request-> Resource Manager->SAD->SAF-> RACF->RACF Database
Answer: User request-> Resource Manager-> SAF-> RACF->RACF Database
What does VSAM stand for? Virtual Storage Access Method Virtually Stored Accessories Methodology Virtual Safe Access Method
Answer: Virtual Storage Access Method
Which z/OS component is used for managing workload distribution, workload balancing, and distributing resources to competing workloads? Workload distribution Resource control Resource balancing Workload manager
Answer: Workload manager
The concept of blocked data or blocking has to do with: A) How data is physically arranged on a storage device B) How the catalog entry for a data set is recorded C) How data is logically arranged on a storage device D) How data is manipulated by a program E) How data is presented to a program
Correct answer(s): A
A System z technique that allows multiple simultaneous operations of two or more programs under the control of one copy of z/OS is called A) SMO (symmetric multioperations) B) SMP (symmetric multiprocessing) C) Multiprogramming D) SMT (symmetric multithreading) E) Clustering
Correct answer(s): B
A System z technique whereby several programs appear to execute concurrently is called A) SMP (symmetric multiprocessing) B) SMT (symmetric multithreading) C) Multiprogramming D) TCMP (tightly coupled multiprocessor) E) SMO (symmetric multioperations)
Correct answer(s): C
What is the difference between byte stream file system and record-oriented file system?
In a byte stream file system, files are just a collection of sequential streams of bits, and there is a special character to tell the computer where a line (or record) ends and the next one begins. In a record-oriented file system, files are organized on the disk into separate records. With record-oriented files, you explicitly define the sizes and attributes of your records, so there is no need for a special end line character, which helps conserve system resources.
How to allocate PDS and PDS members from and ISPF panel?
To allocate a PDS using ISPF on the Option line: =3.2 and enter On option line enter: A (for allocate) On the Name line enter the name of the dataset that we are creating: ISPF.TEMP Press enter. In the next panel type the following and press enter: Command ===> Data Set Name . . . : C332100.ISPF.EX1 Management class . . . (Blank for default management class) Storage class . . . . (Blank for default storage class) Volume serial . . . . VPWRKE (Blank for system default volume) ** Device type . . . . . (Generic unit or device address) ** Data class . . . . . . (Blank for default data class) Space units . . . . . BLOCK (BLKS, TRKS, CYLS, KB, MB, BYTES or RECORDS) Average record unit (M, K, or U) Primary quantity . . 4 (In above units) Secondary quantity 2 (In above units) Directory blocks . . 5 (Zero for sequential data set) * Record format . . . . FB Record length . . . . 80 Block size . . . . . 8000 Data set name type LIBRARY (LIBRARY, HFS, PDS, LARGE, BASIC, * EXTREQ, EXTPREF or blank) Extended Attributes (NO, OPT or blank) Expiration date . . . (YY/MM/DD, YYYY/MM/DD Enter "/" to select option YY.DDD, YYYY.DDD in Julian form Allocate Multiple Volumes DDDD for retention period in days or blank) ( * Specifying LIBRARY may override zero directory block) ( ** Only one of these fields may be specified) Similarly, you can also allocate a sequential data set to the PDS you have just now created: on the Option line: =2 and enter In the next panel enter the name of the member you wish to edit. on the line Other Partitioned, Sequential or VSAM Data Set, or z/OS UNIX file: Name . . . . . 'C332100.DATASET(HELLO)' and press enter.
What is a VTOC? what is a catalog?
VTOC stands for volume table of content. It is a list of dataset that resides on the volume along with information about its location and size of each dataset and other attributes. A catalog describes the dataset name, attributes, and indicates the volume on which it a located.
