Technology Questions

Q:

What is the purpose $_PHP_SELF variable?

Answer

The PHP default variable $_PHP_SELF is utilized for the PHP script name and when you click "submit" catch then same PHP script will be called.

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Subject: PHP
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Q:

Which of these class have only one field 'TYPE' ?

A) Run time B) Process
C) Void D) System
 
Answer & Explanation Answer: C) Void

Explanation:

The Void class has one field, TYPE, which holds a reference to the Class object for the type void.

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Filed Under: Java
Job Role: Analyst , IT Trainer

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Q:

Text/Html is called the __________ of the page

A) content type B) MIME type
C) content type/MIME type D) None of these
 
Answer & Explanation Answer: C) content type/MIME type

Explanation:
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Filed Under: Web Technology

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Q:

Difference between system call and API

Answer

A system call is a function.subroutine which interrupts the currently executing program and transfers control to the interrupt routine.The contents of the executing program are saved and after the interrupt routine finishes its function,control is transferred back to the executing program. If we talk in the context of Linux then System calls are called kernel mode.


Whereas API (Application Programming Interface) is a function or a set of functions, objects, protocols or data-structures for the support of application development for developers/programmers. It is actually a kind of function definition which specifies how to make available of a specific service of the system/OS to the other program/process or system. Read more at: https://www.queryhome.com/48442/os-what-is-difference-between-system-call-and-api

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Q:

What is QUIESCE?

Answer

A QUIESCE flushes all DB2 buffers on to the disk. This gives a correct snapshot of the database and should be used before and after any IMAGECOPY to maintain consistency.

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Q:

What of the following describes protected access specifier?

A) The variable is visible only outside inside the block B) The variable is visible everywhere
C) The variable is visible to its block and to it’s derived class D) None of these
 
Answer & Explanation Answer: C) The variable is visible to its block and to it’s derived class

Explanation:
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Filed Under: C++

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Q:

What is the differences between ABAP and OOABAP. In which situation we use OOABAP?

Answer

OOABAP is used to develop BSP/PCUI applications and also anthing involved object oriented like BADIs, SmartForms..etc.where as ABAP is used to develop traditional programs in R/3.

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Subject: ABAP

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Q:

Which is true?

A) "X extends Y" is correct if and only if X is a class and Y is an interface B) "X extends Y" is correct if and only if X is a class and Y is an interface
C) "X extends Y" is correct if X and Y are either both classes or both interfaces D) "X extends Y" is correct for all combinations of X and Y being classes and/or interfaces
 
Answer & Explanation Answer: C) "X extends Y" is correct if X and Y are either both classes or both interfaces

Explanation:

A is incorrect because classes implement interfaces, they don't extend them. B is incorrect because interfaces only "inherit from" other interfaces. D is incorrect based on the preceding rules.

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Filed Under: Java

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