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Q:

Why cannot you run standard Java bytecode on Android?

Answer

Android uses Dalvik Virtual Machine (DVM) which requires a special bytecode. We need to convert Java class files into Dalvik Executable files using an Android tool called "dx". In normal circumstances, developers will not be using this tool directly and build tools will care for the generation of DVM compatible files.

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Subject: Application Development

Q:

What is AIDL?What data types are supported by AIDL?

Answer

- AIDL is the abbreviation for Android Interface Definition Language. 


- It handles the interface requirements between a client and a service to communicate at the same level through interprocess communication. 


- The process involves breaking down objects into primitives that are Android understandable.


 


AIDL supports following data types:


- String


- List


- Map


- CharSequence


- All native Java data types like int,long, char and Boolean

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Subject: Application Development

Q:

What is meant by index cardinality?

Answer

The number of distinct values for a column is called index cardinality. DB2's RUNSTATS utility analyzes column value redundancy to determine whether to use a tablespace or index scan to search for data.

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Subject: Mainframe Interview

Q:

File contains 5 records say D,E,F,C,A-I want to copy D and A records only by using file-aid?

Answer

Go to file-aid copy option.Enter the from dataset to be copied and to dataset to which you want to copy.go to options. Enter 0 at Initial records to skip field.Then enter 3 at the no of records to skip field and 1 to no of records to select.press enter and PF3.

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Subject: Mainframe Interview

Q:

What do you accomplish by GROUP BY ... HAVING clause?

Answer

GROUP BY partitions the selected rows on the distinct values of the column on which you group by. HAVING selects GROUPs which match the criteria specified

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Subject: Mainframe Interview

Q:

What exactly do you mean by UDP?

Answer

UDP (User Datagram Protocol) is a communications protocol that offers a limited amount of service when messages are exchanged between computers in a network that uses the Internet Protocol (IP).

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Subject: Microsoft Interview

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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Subject: Microsoft Interview

Q:

How would you free the memory allocated by the following program?

#include "alloc.h"

#define MAXROW 3

#define MAXCOL 4

main()

{

     int **p, i;

     p = (int **) malloc (MAXROW * sizeof (int *));

      for ( i = 0; i < MAXROW ; i++)

            p[i] = (int *) malloc (MAXCOL * sizeof (int ));

}

Answer

for ( i=0; i < MAXROW ; i++)


free (p[i]);


free (p);

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Subject: Programming