Answer:- • seekTo in OpenGap Media API is a function that updates the latest position of the underlying audio file of a Media Object • getDuration is a function that returns the duration of the audio file in seconds. It will return the value -1, if the duration is unknown

Answer:- As the front-end uses JavaScript it does have some limitation • Data processing: Compare to JavaScript native language is much faster • Back-ground processing: Large number of application depends on background thread while PhoneGap API are built using JavaScript which does not support multi-threaded and hence does not support back ground processing • Advanced graphics: Apps that use advanced graphics can be accessed explicitly by third party libraries, which can be best done natively • Complex business logic: Number of complex business app can be accessed better with a native code • Access advanced native functionality: Number of native API’s are not supported by PhoneGap’s API

Answer:- • Memory-store.js (MemoryStore) • Is-store.js (LocalStorageStore) • Websql-store.js (WebSqlStore)

Answer:- VMware provides different applications and software for virtualization. VMware products are categorized into two levels, desktop applications, and Server applications. It is useful for: • Running multiple operating systems and applications on a single computer • Consolidate hardware to get vastly higher productivity from fewer servers • Save more than 50% of total cost spend on IT • It simplifies IT management and speeds up the deployment of new applications

Answer:- Different types of virtualization available are Application virtualization Presentation virtualization Network virtualization Storage virtualization

Answer:- VMware provides three different types of server software VMware ESX Server VMware ESXi Server VMware Server

Answer:- A hypervisor is a program that enables multiple operating systems to share a single hardware host. Each operating system has the host’s processor, memory and other resources all to itself. The hypervisor controls the resources and host processor, allocating what is required for each operating system in turn and make sure that the guest operating system cannot disrupt each other.

Answer:- VMware DRS stands for Distributed Resource Scheduler; it dynamically balances resources across various host under a cluster or resource pool. It enables users to determine the rules and policies which decide how virtual machines deploy resources, and these resources should be prioritized to multiple virtual machines.

Answer:- VMware fault tolerance is an important component of VMware vSphere, and it offers continuous access to applications by preventing data loss and downtime of virtual machines in the event of ESX server failure.

Answer:- FT logging is one of the options in VMKernel port setting which is more or less the same as enabling vmotion option in the vmkernel port.

Answer:- Different components used in VMware infrastructure includes • It consists of the lowest layer which acts as an ESX server host • It also uses the virtual center server which keeps tracks of all the VM associated images and manages it from one point • VMWare infrastructure client, it enables the client to communicate with user’s applications that are running on VMware • Web-browser is used to access the virtual machines • The license server is used to prepare a server which provides licensing to the applications • Database servers are availed to maintain a database

Answer:- vCloud Suite combines with multiple VMware components to give a complete set of cloud infrastructure capabilities in a single package, including virtualization, software-defined datacenter services, disaster recovery, application management, etc.

Answer:- The storage and availability in vCloud Computing Suite includes Storage DRS:It place and load balance virtual machines based on storage capacity and I/O latency Storage vMotion:It employs proactive, non-disruptive storage migration to reduce virtual machine storage I/O bottlenecks and free up valuable storage capacity Application HA:It gains high availability that is bound to specific applications Data Protection: Based on EMC avamar, it deploys a back-up and recovery tool

Answer:- In VMware HA, it has a mechanism to detect a host isolated from the rest of the hosts in the cluster. In simple words, it uses a heartbeat to communicate another host in the cluster. When the ESX host loses its ability to connect with other hosts in a cluster through heart-beat, then ESX host will be considered as a Host Isolation.