Interview Questions

Q:

How many types of constructor are there in C++?

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: C) 3

Explanation:

There are three types of constructor in C++. They are Default constructor, Parameterized constructor, Copy constructor.

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Filed Under: C++

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Q:

What’s the difference between accessing a class method via -> and via ::?

Answer :: is allowed to access methods that can perform static operations, i.e. those, which do not require object initialization.
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Subject: PHP

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Q:

How is 3G different from 2G?

Answer

- Packet data speed is higher in 3G, and it is up to 384 KBPS
- Voice and sms speed is also 384 KBPS in 3G
- 2G utilizes different switching techniques for voice and data, where as  3G uses single switching, irrespective of data
- 3G has at least 2MB of data link of a mobile, where in 2G the data rate is in KBPS
- 3G has WiMAX facility for faster VOIP and internet
- 2G uses GSM TDMA technology with narrowband 200Khz.
- 3G uses CDMA technology with broadband 5Mhz, with same frequency carrier and time.

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Q:

Assuming that the DEFINE JCL is not available, how do you get info about a VSAM files organisation?

Answer

Use the LISTCAT command.

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Q:

A binary tree with 7 nodes will have how many null branches?

A) 6 B) 7
C) 8 D) 5
 
Answer & Explanation Answer: C) 8

Explanation:

A binary tree with n nodes has exactly n+1 null nodes

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Q:

What is JSON ?

Answer

* JSON full form is JavaScript Object Notation.
* JSON is a lightweight text-based open standard designed for human-readable data interchange.
* It is derived from the JavaScript programming language for representing simple data structures and associative arrays, called objects.
* And JSON is language-independent, with parsers available for virtually every programming language.
* Uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python,php
* The JSON format is often used for serializing and transmitting structured data over a network connection.
* When third party data interchane(REST Services) then JSON may used there LIKE SHOP.
* It is primarily used to transmit data between a server and web application, serving as an alternative to XML.


 

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Q:

What is the types of assets?

Answer

There are three types of assets
1. Fixed assets     :
Those assets which will be used by the company for a long period of time.
a) Tangible assets: those assets which we can see and touch and exp Land & Buildings, Plant & Machinery,Furniture, fixtures and fittings
b) Intangible assets: Those assets which we can't see and touch like Goodwill, Patents, Copyrights, Trade Mark etc

2. Current assets  :
Those assets which can be easily converted into cash within one year like cash in hand, cash at bank, Bills receivable, stock etc

3. Fictitious assets:
its not the actual assets , its the expenditure occurred at the tine of commencement of firm ( capital expenditure )like preliminary expenses, discount on issue on debenture/shares, underwriting commission etc

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Subject: Accounts Payable

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Q:

Explain Row level and statement level trigger.

Answer

Row Level Trigger :
Row Level Trigger is fired each time row is affected by Insert, Update or Delete command. If statement doesn’t affect any row, no trigger action happens.

Statement Level Trigger :
This kind of trigger fires when a SQL statement affects the rows of the table. The trigger activates and performs its activity irrespective of number of rows affected due to SQL statement.

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Subject: Oracle

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