Interview Questions

Q:

Can you access non static variable in static context ?

Answer

A static variable in Java belongs to its class and its value remains the same for all its instances. A static variable is initialized when the class is loaded by the JVM. If your code tries to access a non-static variable, without any instance, the compiler will complain, because those variables are not created yet and they are not associated with any instance.

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Subject: Java

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Q:

What File system is supported by Windows XP?

Answer

Windows XP supports four major file systems: FAT12, FAT16, FAT32 and NTFS. This means that Windows XP can be installed on these file systems. The use of NTFS is preferred especially when using a bigger hard drive space.

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Q:

What are the dialog boxes that are supported in android? Explain.

Answer

AlertDialog : An alert dialog box supports 0 to 3 buttons and a list of selectable elements, including check boxes and radio buttons. Among the other dialog boxes, the most suggested dialog box is the alert dialog box.


ProgressDialog: This dialog box displays a progress wheel or a progress bar. It is an extension of AlertDialog and supports adding buttons.

DatePickerDialog: This dialog box is used for selecting a date by the user.

TimePickerDialog: This dialog box is used for selecting time by the user.

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Q:

What’s the difference between include and require?

Answer It’s how they handle failures. If the file is not found by require(), it will cause a fatal error and halt the execution of the script. If the file is not found by include(), a warning will be issued, but execution will continue.
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Subject: PHP

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Q:

Which of the following is an example of market failure?

A) Prices do not reflect the full social cost of production B) A firm goes out of business because it cannot find a market for its products
C) Prices rise so that the consumers cannot afford the products they want to buy D) Producer surplus is maximized
 
Answer & Explanation Answer: A) Prices do not reflect the full social cost of production

Explanation:

Prices do not reflect the full social cost of production is an example of Market failure.

 

A market failure occurs when the supply of a good or service is insufficient to meet demand. This results in an inefficient distribution of resources among market participants.

It also occurs if externalities are not accounted for.

If a firm fails to maximize its profits this is not a general market failure.

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Filed Under: Marketing and Sales
Exam Prep: AIEEE , Bank Exams , CAT
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Q:

What is String Args in Java?

Answer

String Args (String []) is an array of parameters of type String.


In Java, 'args' contains the supplied command-line arguments as an array of String objects. In other words, if you run your program as 'java MyProgram Hello World' then 'args' will contain ["Hello", "World"]. When a java class is executed from the console, the main method is what is called.

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Q:

Differentiate between localStorage and sessionStorage objects.

Answer

- localStorage object stores the data without an expiry date while sessionStorage object stores the data only for one session. 


- With localStorage object, data will not be deleted when the browser window is closed while the data is deleted when the browser window closes with sessionStorage objects.

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Subject: Web Technology

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Q:

What is a PHP Filter?

Answer

A PHP filter is used to validate and filter data coming from insecure sources.
To test, validate and filter user input or custom data is an important part of any web application.
The PHP filter extension is designed to make data filtering easier and quicker.

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Subject: PHP

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