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Q:

What is static initializer block? What is its use?

Answer

A static initializer block is a block of code that declares with the static keyword. It normally contains the block of code that must execute at the time of class loading. The static initializer block will execute only once at the time of loading the class only.

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Subject: Java

0 2128
Q:

What guidelines should be followed to write a structured COBOL program ?

Answer

Following guidelines to be following while writing Cobol program:


- Use ? EVALUATE ? statement for constructing cases.


- Use scope terminators for nesting.


- Use in-line Perform statement for writing ?do? constructions.


- Use Test Before and Test After in the Perform statement while writing Do-While statements.

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Subject: Mainframe Interview

0 2127
Q:

How can we know the number of days between two given dates using php?

Answer

<?php
$tomorrow = mktime(0, 0, 0, date("m") , date("d")+1, date("Y"));
$lastmonth = mktime(0, 0, 0, date("m")-1, date("d"), date("Y"));
echo ($tomorrow-$lastmonth)/86400;
?>

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Subject: PHP

0 2125
Q:

SQL vs. PL/SQL

Answer

SQL is a structured query language while PL/SQL is an extension of SQL by introducing a procedural flow. PL/SQL has blocks of statements. PL/SQL works like other procedural languages and has concepts like control statements, sequential statements, exception handling etc.

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Subject: Oracle

0 2125
Q:

Explain the process of creating a context menu using the ContextMenu component

Answer

ContextMenu component provides the users with the ability to access some very frequently used commands. Context menu works by right click of mouse. They mainly provide access to commands particular to the control that has been clicked upon.

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Subject: .NET

0 2121
Q:

A database is used to

A) store data B) modify data
C) extract data D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A database is used to store, modify, extract and to search for the data within it.

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Filed Under: SQL
Job Role: Analyst , Database Administration , IT Trainer , Project Manager

7 2118
Q:

Differentiate different types of Doctypes from one another.

Answer

Doctype helps the web browser to correctly render the web pages. There are different types of Doctype that are available and they are as follows:


=> Strict Doctype: it consists of all the HTML elements and it is also known as DTD (Document type definition) but it doesn't include the presentational and deprecated elements i.e. font, center, etc. Framesets related elements are also not allowed in this. For example:


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"


"https://www.w3.org/TR/html4/strict.dtd">


=> Transitional Doctype: it consists of all the HTML elements and attributes. It is also known as DTD (Document type definition). It includes the presentational and deprecated elements i.e. font, center, etc. Framesets related elements are also not allowed in this. For example:


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"


"https://www.w3.org/TR/html4/loose.dtd">


=> Frameset Doctype: it consists of all the HTML elements and attributes. It is also known as DTD (Document type definition). It includes the presentational and deprecated elements i.e. font, center, etc. Framesets related elements are also allowed in this. For example:


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN"


"https://www.w3.org/TR/html4/frameset.dtd">

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Subject: Web Technology

0 2115
Q:

What is the use of super call?

Answer

By using super call we can call super class constructors  from sub class constructors and we can initialize super class private data.

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Subject: Java

0 2112