Interview Questions

IUnknown as an interface of a COM object. Every COM object has to support IUnknown, besides optionally adding other interfaces.

IUnknown is made of QueryInterface, AddRef and Release.

Cloud data center doesn’t require experts to operate it, but it requires skilled people to see the maintenance, maintain the workloads and to keep the track of the traffic. The labor cost is 6% of the total cost to operate the cloud data center. Power distribution and cooling of the datacenter cost 20% of the total cost. Computing cost is at the end and is the highest as it is where lots of resources and installation has to be done. It costs the maximum left percentage.

These days channel members are being accepted by companies as their partners. The intermediaries are even being asked to integrate their business with the companies which results in lesser costs, greater efficiency and improved customer service. Corporates like Airtel are adopting PRM (Partner relationship management) software to give that added advantage to their supply chain. They organise rewards and recognition programs for their channel partners and also organise proper channels though which partners can vent any of their grievances relating to payments, violation of codes etc.

A savings account is the most basic type of account at a bank or credit union, allowing you to deposit money, keep the funds safe, and withdraw funds as needed. Savings accounts typically pay interest on your deposits, which helps you grow your money, but rates are relatively low on these low-risk accounts.

A checking account is a deposit account held at a financial institution that allows withdrawals and deposits. Also called demand accounts or transactional accounts, checking accounts are very liquid and can be accessed using checks, automated teller machines and electronic debits, among other methods.

Hence, Saving accounts usually offer higher interest rates than checking accounts.

You should have recorded in your cash books all amounts you?ve actually received and payments you?ve actually made. However, the cash books may be incomplete as your bank may have put extra transactions through your account, such as:

bank fees or interest charges
direct debits (payments) and direct credits (receipts).
Doing a regular bank reconciliation will allow you to:

take into account any extra transactions your bank puts through your account, and
check and record any errors or omissions.
By regularly doing a bank reconciliation (say monthly) you can be more confident that your records contain all the information you need to prepare your income tax return and activity statements.

reconciliation- This is a statement prepared to find the reason for difference in any two balance.
eg 1)bank reconciliation is prepared to find the reason of difference between the passbook & cash book balance
2)Stock reconciliation is prepared to the reason of difference between the physical balance & book balance or to find the stock balance as on certain date.
etc

The Singleton design pattern ensures a class only has one instance, and provides a global point of access to it. The class keeps track of its sole instance and ensures that no other instance can be created. Singleton classes are appropriate for situations where it makes sense for a single object to provide access to a global resource.Several Cocoa framework classes are singletons. They includeNSFileManager, NSWorkspace, NSApplication, and, in UIKit,UIApplication. A process is limited to one instance of these classes. When a client asks the class for an instance, it gets a shared instance, which is lazily created upon the first request.

Catalog views return information that is used by the SQL Server Database Engine. Catalog Views are the most general interface to the catalog metadata and provide the most efficient way to obtain, transform, and present customized forms of this information. All user- available catalog metadata is exposed through catalog views.

“In software testing, a test harness or automated test framework is a collection of software and test data configured to test a program unit by running it under varying conditions and monitor its behavior and outputs. It has two main parts: the test execution engine and the test script repository.”