EMC Interview Questions Answers

 1) What information is displayed on the Availability Tracking screen?


The amount of planned downtime of a managed resource.

2) What causes the data source to report an unknown state?

The agent failed or shut down

3) How should you determine which ports to use for the AAM installation?

Use the ft_setup script to view available ports during installation

4) Which two tasks can occur on a secondary agent in EMC environment?

Restart the backbone, Maintain a copy of the database

5) A system administrator is monitoring the AAM domain and notices that a Resource Group is in the unknown state. What does this state indicate?

The agent on the node hosting the Resource group is in the failed state

6) Where is the initial microcode program load file - IMPL.bin - stored in Symmetrix?

Service Processor and Director boards

7) How are disks accessed by UNIX hosts?

Using device special files

8) What are iSCSI naming conventions?

iQN, EUI

9) How does TimeFinder/Snap save disk space while providing full access to theoriginal data on the snapshot copy?

It creates pointers to the original data

10) What is the difference between theNSXXXG and the NSXXX?

NSXXXG allows the sharing of back-end storage with other hosts

11) Which is monitored by the ControlCenter Host agent?

Windows 2000 disk

12) What is the benefit of SRDF/Automated Replication solution ?

The SRDF/Automated Replication solution provides a copy of the data on the Target device, which will be several minutes to hours behind the Source

13) What is the purpose of a TimeFinder/Mirror reverse split operation?

The BCV will synchronize from its mirror

14) What is the correct sequence for starting a ControlCenter component?

Repository, Server, Store

15) After a client has presented information to be stored on Centera, what is the next step?

Unique Content Address is calculated

16) What is the purpose of Dynamic Mirror Service Policy for Symmetrix?

It uses both M1 and M2 mirrors to fulfill read requests as quickly as possible

17) Which views in the ControlCenter Console can be used to monitor the environment?

Relationship, Topology

18) What is a feature of both TimeFinder/Mirror and TimeFinder/Mirror Clone?

Identical storage capacity as the Source device

19) How many octets in a default Class B IPv4 address make up the network portion?

2

20) What is the maximum number of Blades supported in the NSX range of equipment?

8

21) How many optical network ports are available on a NSX Blade?

2

22) lr.com has a primary CX600 array and a secondary CX400 array. lr.com wants to do data backup on the secondary site while the applications are still running on the primary site. How can lr.com accomplish this goal?

MirrorView and SnapView

23) Which best describes a Fan-out Ratio for a SAN attached array?

The qualified maximum number of initiators that can access a single Target port through a SAN

24) Which web interfaces can be used to manage standalone M-Series switches?

EWS

25) Which components are required in order to enable write caching in a CLARiiON array?

2 power supplies, 2 storage processors, 2 LCC cards and at least one standby power supply

26) Which is not a CLARiiON High Availability feature?

Dual consoles

27) What are Celerra Replicator features?

Point-in-time copy over an IP network, Only sends changed data over the IP network

28) Which types of disk drives are currently used on CLARiiON CX series storage systems?

Dual ported Fibre Channel disk drives and ATA disk drives

29) What is the function of the Control Center infrastructure?

Stores data for objects

30) What are characteristics of cache memory on a CLARiiON array?

Write cache is always mirrored, Page size is set for the array

31) In a Symmetrix, what is Parity RAID?

Difference data that are results of XOR calculation passed between drives by Das

32) Which protocol uses TCP/IP to tunnel Fibre Channel frames?

FCIP

33) Which network based backup solution maintains both NFS and CIFS attributes?

NDMP based backups

34) Which types of disk drives are currently used on CLARiiON CX series storage systems?

Dual ported Fibre Channel disk drives and ATA disk drives

35) What are features of Celerra Replicator?

Synchronous data recovery, Point-in-time copy over an IP network

36) What is the function of the Control Center infrastructure?

Stores data for objects

37) What are characteristics of cache memory on a CLARiiON array?

Write cache is always mirrored. Page size is set for the array

38) Which protocol uses TCP/IP to tunnel Fibre Channel frames?

FCIP

39) Which network based backup solution maintains both NFS and CIFS attributes?

NDMP based backups

40) Which product is used to create Logical Volumes on a Symmetrx system?

Control Center Symmetrix Manager

41) Which Symmetrix connectivity options can be used with mainframe hosts?

ESCON and FICON

42) Which control center view provides a single graphical view of the whole environment, including consolldated alters and threshold charts?

At A Glance

43) What is a benefit of using zoning in a SAN?

Security at the switch port level

44) What is a characteristic of enterprise directors?

Fully redundant components

45) Which protocol is used by open system hosts to access block level storage over IP?

ISCSI

46) How is free maintained in the CLARIION write cache?

Cache is flushed to the driver during I/O only the least -recently used page are flushed

47) Which symmetric presents devices to hosts?

Channel Director

48) In a Centera, what is an Access Profile?

Used by applications to authenticate to a Cluster

49) What is a characteristic of Centera?

Single instance storage

50) What is the Address Resolution Protocol responsible for resolving in Direct Routing?

The MAC address of a known IP address

51) How are characters transmitted in Synchronous transmissions ?

Multiple characters are transmitted at a time

52) What is the Address Resolution Protocol responsible for resolving in Indirect Routing?

The MAC address of the Default gateway

53) What is a function of NetWorker?

Centralize and automate backup and recovery

54) What are features of a NetWorker storage node?

Manages devices, generates tracking data, and supports multiplexing

55) With IP version four (IPv4) addresses, how many octets make up the address?

4

56) With IPv6, what is the size of the address space?

128 bits

57) How is metadata passed in NDMP2D backup ?

Metadata passes over the network infrastructure

58) A Windows client must perform which operation to access a NAS advertised connection point?

Map

59) A Windows client must perform which operation to access a NAS advertised connectionpoint?

Map

60) What is the final step when retrieving an object in the Centera environment?

Centera authenticates request and delivers object

61) What is the first step or event when storing an object in a Centera environment?

Unique Content Address is calculated

62) What is a characteristic of a Content Address in a Centera?

Location-independent

63) What do VLANs reduce?

The router traffic overhead in the network infrastructure

64) What is a characteristic of Centera fixed content?

Unalterable

65) How does NetBIOS handle name resolution?

Makes use of an /mhosts/file for local administration of name resolution

66) What is the second step or event when storing an object in a Centera environment?

Object is sent to Centera via Centera API over IP

67) What best describes the TimeFinder Full Establish operation between a Standard and BCV device pair?

Change the status of the BCV to Not Ready; copy the entire contents of the Standard device to the BCV

68) What is the purpose of Dynamic Mirror Service Policy for Symmetrix?

It uses both M1 and M2 mirrors to fulfill read requests as quickly as possible.

69) What are the data types supported in NAS?

File level

70) Which views in ControlCenter Console displays Front End Directors, Disk Directors, and all the devices for a Symmetrix array?

Visual Storage

71) What is the purpose of the Masking ControlCenter Task Bar in ControlCenter?

Storage Allocation

72) Which NetWorker servers can NetWorker Management Console manage?

All NetWorker servers in the enterprise

73) What does the OSI Data Link layer provide?

Data encapsulation

74) What tool is used by service personnel to troubleshoot the Centera?

Centera Viewer

75) Is AVM used by default when creating volumes with the GUI?

Yes. It is used by default when creating volumes with the GUI

76) Give name of a dynamic routing protocol :-

OSPF

77) What is a feature of SnapView Clones?

Copy requires same space as Source LUN

78) In a CLARRiiON array, a read cache operation begins when host requests data. What is the next step in the process?

The storage processor recognizes that the requested data is an cache memory, and retrieves the data

79) Which access method id used for file sharing over an IP network?

NAS

80) Which is a valid Fibre Channel Topology?

Switched Fabric

81) A read cache miss operation on a Symmetrix has several steps. The first step is that the hostsends a read request. What is the next step?

The Channel Director checks the track table.

82) At what percentage of cache capacity does high water mark cache flushing initiate in a CLARiiONsystem at the default setting?

80%

83) In a CLARRiiON array, a read cache operation begins when host requests data. What is the nextstep in the process?

The storage processor recognizes that the requested data is an cache memory, and retrieves the data

84) In ControlCenter, what does the Masking ControlCenter Task Bar do?

Storage Allocation

85) What determines the order data is flushed from Symmetrix Global Cache Memory?

Age-link-chain

86) Which two types of storage connectivity are associated with block level data?

DAS and SAN

87) Which protocol is used by open systems hosts to access block level storage over IP?

ISCSI

88) What is a characteristic of file level host storage access?

Data is accessed using NFS, CIFS, and FTP

89) Which Symmetrix connectivity options can be used with Open Systems and Windows Hosts?

Fibre Channel and SCSI

90) What are characteristics of a Content Address in a Centera?

Location-independent, Globally unique

91) Which Symmetrix system uses a two bus architecture that consists of an "X" nad a "Y" bus?

Symmetrix 4.8

92) What is a characteristic of Connectrix enterpise directors?

Fully redundant components

93) Which load balancing policy available in PowerPath relates to path failover only?

Request

94) What is Windows NT security account manager?

It is the database containing the identity of the users and their credentials

95) What is the function of the Automated Resource Manager - Storage Provisioning Services

component of ControlCenter?

Reports key historical performance data

96) In a Symmetrix, what is Dynamic Sparing?

One or more disk drives that used when Symmetrix detects a potentially failing or failed device

97) How does TimeFinder/Snap save disk space while providing full access to the original data on the snapshot copy?

It creates pointers to the original data

98) Can NAS clients access data that are physically separate?

Yes. They can access data irrespective of their physical locality

99) Give name of network topology popularly adopted in storage infrastructure?

Ring,Bus

100) Which is a feature of both TimeFinder/Mirror andTimeFinder/Mirror Clone?

Identical storage capacity as the Source device