Question 1

What is the string contained in s after following lines of code? StringBuffer s = new StringBuffer(“Hello”); s.deleteCharAt(0); ?

Accepted Answer

deleteCharAt() method deletes the character at the specified index location and returns the resulting StringBuffer object. So after deleting the character at 0 ie 'H', the string returns 'ello' as the output.

Question 2

What is Cocoa and cocoa touch?

Accepted Answer

Cocoa is for Mac App development and cocoa touch is for apples touch devices - that provide all development environment

Question 3

Give example scenarios when an application goes into InActive state?

Accepted Answer

An app can get into InActive state when the user locks the screen or the system prompts the user to respond to some event eg SMS message, incoming call etc

Question 4

What are the tools required to develop iOS applications?

Accepted Answer

IOS development requires Intel-based Macintosh computer and iOS SDK

Question 5

What is Automatic Reference Counting (ARC) ?

Accepted Answer

ARC is a compiler-level feature that simplifies the process of managing the lifetimes of Objective-C objects Instead of you having to remember when to retain or release an object, ARC evaluates the lifetime requirements of your objects and automatically inserts the appropriate method calls at compile time

Question 6

What is ARC ?

Accepted Answer

ARC is a compiler-level feature that simplifies the process of managing the lifetimes of Objective-C objects Instead of you having to remember when to retain or release an object, ARC evaluates the lifetime requirements of your objects and automatically inserts the appropriate method calls at compile time

Question 7

What are the security laws which take care of the data in the cloud?

Accepted Answer

The security laws which are implements to secure data in the cloud are as follows: - Input validation : controls the input data which is being to any system - Processing : control that the data is being processed correctly and completely in an application - File : control the data being manipulated in any type of file - Output reconciliation : control the data that has to be reconciled from input to output - Backup and recovery: control the security breaches logs and the problems which has occurred while creating the back

Question 8

How does fault tolerance work in mapreduce?

Accepted Answer

In a mapreduce job the master pings each worker periodically In case a worker does not respond to that system then the system is marked as failed Even completed tasks are rescheduled because the output was stored in a in a local disk of a worker which failed Hence mapreduce is able to handle large-scale failures easily by simply restarting a task The master node always saves itself at checkpoints and in case of any failure it simply restarts from that checkpoint

Question 9

Write a SQL Query to find year from date.

Accepted Answer

SELECT YEAR(GETDATE()) as "Year";

Question 10

Write SQL Query to find second highest salary of Employee.

Accepted Answer

There are many ways to find second highest salary of Employee in SQL, you can either use SQL Join or Subquery to solve this problem Here is SQL query using Subquery : SELECT MAX(Salary) from Employee WHERE Salary NOT IN (select MAX(Salary) FROM Employee );

Question 11

A UNION query is which of the following?

Accepted Answer

A UNION query combines the output from multiple queries and must include the same number of columns.

Question 12

What is ALV programming in ABAP? When is this grid used in ABAP?

Accepted Answer

ALV is Application List viewer Sap provides a set of ALV (ABAP LIST VIEWER) function modules which can be put into use to embellish the output of a report This set of ALV functions is used to enhance the readability and functionality of any report output Cases arise in sap when the output of a report contains columns extending more than 255 characters in length In such cases, this set of ALV functions can help choose selected columns and arrange the different columns from a report output and also save different variants for report display This is a very efficient tool for dynamically sorting and arranging the columns from a report output The report output can contain up to 90 columns in the display with the wide array of display options

Question 13

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

Accepted Answer

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

Question 14

What is CTS and what do you know about it?

Accepted Answer

The Change and Transport System (CTS) is a tool that helps you to organize development projects in the ABAP Workbench and in Customizing, and then transport the changes between the SAP Systems and clients in your system landscape This documentation provides you with an overview of how to manage changes with the CTS and essential information on setting up your system and client landscape and deciding on a transport strategy Read and follow this documentation when planning your development project

Question 15

Which of the following is not considered a JavaScript operator?

Accepted Answer

this

Question 16

Describe the Basic Steps used to create a tiles application in DHTML.

Accepted Answer

- Create a template that designs a layout for your application - Create the composing pages - Create a definition which means that suppose that you configured Tiles, in webxml, to startup using the TilesServlet, we need to specify which files will contain the Tiles definitions to load - Render the definition

Question 17

What is Contextual Selector ?

Accepted Answer

Contextual selector addresses specific occurrence of an element It is a string of individual selectors separated by white space (search pattern), where only the last element in the pattern is addressed providing it matches the specified contex

Question 18

Which one of the following is not used to generate dynamic web pages ?

Accepted Answer

none of the mentioned

Question 19

The Internet was launched in 1969 and was originally called ?

Accepted Answer

The Internet was originally called Advanced Research Project Agency Network (ARPANET).

Question 20

What is JSON ?

Accepted 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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