Interview Questions

Q:

What is locking ? what are the advantages of locking?

Answer

Locking is a mechanism to ensure data integrity while allowing maximum concurrent access to data. It is used to implement concurrency control when multiple users access table to manipulate its data at the same time.


Advantages :


- Avoids deadlock conditions


- Avoids clashes in capturing the resources

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Subject: Oracle

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Q:

Goods that are excludable include both

A) public goods and common resources B) common resources and private goods
C) natural monopolies and public goods D) private goods and natural monopolies
 
Answer & Explanation Answer: D) private goods and natural monopolies

Explanation:

Goods that are excludable include both private goods and natural monopolies.

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Filed Under: Accounts Receivable
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

8 3257
Q:

What is salary TDS?

Answer

Means whatever income any employee received from the organisation and on that tax to be deducted. (e.g. Gross salary, Overtime, Bonus, Incentives etc.)

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Q:

What is an explicit constructor?

Answer

A conversion constructor declared with the explicit keyword. The compiler does not use an explicit constructor to implement an implied conversion of types. It’s purpose is reserved explicitly for construction

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Subject: C++
Job Role: Software Architect

0 3255
Q:

Name and explain the type of locks?

Answer

There are three types of lock, namely:


Shared – This type of lock permits two or more programs to read from the locked space but does not allow them to change it.


Update – This lock is more lenient. It permits the program to read and change the locked space.


Exclusive – This lock restricts all users from accessing the locked space.

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Q:

For printing out strings, there are echo, print and printf. Explain the differences.

Answer - echo is the most primitive of them, and just outputs the contents following the construct to the screen. print is also a construct (so parentheses are optional when calling it), but it returns TRUE on successful output and FALSE if it was unable to print out the string. However, you can pass multiple parameters to echo, like:

and it will output the string "Welcome to TechInterviews!" print does not take multiple parameters. It is also generally argued that echo is faster, but usually the speed advantage is negligible, and might not be there for future versions of PHP. printf is a function, not a construct, and allows such advantages as formatted output, but it’s the slowest way to print out data out of echo, print and printf.
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Subject: PHP

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Q:

Exlpain STL.

Answer

STL stands for Standard Template Library. It is a library of container templates approved by the ANSI committee for inclusion in the standard C++ specification.

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Subject: C++

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Q:

What is Language Integrated Query (LINQ)?

Answer

LINQ is a programming model that is the composition of general-purpose standard query operators that allow you to work with data, regardless of the data source in any .NET based programming language. It is the name given to a set of technologies based on the integration of query capabilities into any .NET language.

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Subject: .NET

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