Interview

Front 1

A thread consists of four subcomponents:

Back 1

a program counter
a collection of variables that can only be accessed by the thread,
a collection of variables that can be accessed by the thread in question and other threads, and
a set of synchronization primitives that allow one thread to unambiguously influence the program counter of another.

Front 2

local state
global state

Back 2

Variables that can be accessed only by the thread are called local state.

Variables that can be accessed by more than one thread are typically called global state

Front 3

threads Vs. process

Back 3

threads share variables

processes are disjoint

Front 4

pthread_create

exit

Back 4

int pthread_create(pthread_t *new_thread_ID,
const pthread_attr_t *attr,
void * (*start_func)(void *),
void *arg);

int pthread_join(pthread_t target_thread,
void **status);


return or pthread_exit()

Front 5

different machine architectures use different binary representations for integers and floating point numbers.

Back 5

little endian

big endian

Front 6

network byte order

Back 6

convert you addresses to a canonical byte ordering that all architectures can then convert to a local representation

Front 7

uint32_t htonl(uint32_t host_long);

uint16_t htons(uint16_t host_short);

Back 7

uint32_t ntohl(uint32_t net_long);

uint16_t ntohs(uint16_t net_short);

Front 8

open socket

Back 8

#include < sys/socket.h >

int tcp_sd;
int udp_sd;

tcp_sd = socket(AF_INET, SOCK_STREAM, 0);
udp_sd = socket(AF_INET, SOCK_DGRAM, 0);

ret_val = -1 for failure

Front 9

socket strcuture

Back 9

struct sockaddr_in {
uint_8 sin_len; /* length of structure (16) */
sa_family_t sin_family; /* address family is AF_INET for IP */
in_port_t sin_port; /* port number (UDP/TCP)
struct in_addr sin_addr; /* IP address */
char sin_zero[8]; /* unused */
};

Front 10

server side socket:

Back 10

open ( socket() )
bind()
listen()
accept()

Front 11

bind

Back 11

#include < netinet/in.h >

bind(tcp_sd, (struct sockaddr *)&sa, sizeof(sa));

Front 12

listen

Back 12

listen(tcp_sd, 5);

5:# of connections

Front 13

accept

Back 13

new_sd = accept(tcp_sd, (struct sockaddr *)&remote_addr, sizeof(remote_addr));

tcp_sd: server socket
new_sd: active socket

Front 14

client side socket:

Back 14

socket
bind
connect

Front 15

Sub and Function

Back 15

Sub doesn't return value
Function returns value
keywords: SUB/FUNCTION

Front 16

vb.net - What is DLL hell?

Back 16

in short - Overwriting a older version of dll by a new version of dll is known as Dll Hell problem.
need to find more info for this one.

Front 17

What does VS.NET (visual studio.net) contains ?

Back 17

VS.NET contains .NET in short - FRAMEWORK includes Window form, Web
Form, Base Class Libraries and CLR.
Visual Studio .Net is basically a framework which makes easy
development of codes written in Various programming languages..
It contains two things
1.Framework Class Library:It contains various classes
managed within various namespaces.

2.Common Language Runtime:CLR is the execution engine which
helps in compiling the IL code into machine code,takes care
of security issues and many other critical tasks.
Web pages,windows apps,console applications,Class libriaries
are various options which can be created using VS.net

Front 18

Crystal report - Can we use a crystal report into a another crystal report

Back 18

yes, using crystal sub reporting, we can use a crystal
report in to another crystal report.

Front 19

how to create views in sql with syntax and example

Back 19

create view <Viewname> as
select a as A,b as B,c as C
from <tablename>
where <whereclause{optional}> order by A

CREATE VIEW view_name AS
SELECT column_name(s)
FROM table_name
WHERE condition

Using Views
CREATE VIEW [Current Product List] AS
SELECT ProductID,ProductName
FROM Products
WHERE Discontinued=No

Front 20

Advantage of vb.net over vb ?
difference between vb6 and vb.net

Back 20

http://allinterview.com/showanswers/20441.html
http://allinterview.com/showanswers/5000.html
1. vb.net support Multi-Threading.
2. vb.net is used as language in asp.net
3. vb.net is OO while vb is object based.
4. vb.net support exception handling.
5. VB.Net can be used in Managed Code
6. It supports inheritance, implement
7.having support for the console based applications
8.vb has its own interpreter and vb.net has compiler(CLR).

Front 21

In order to get assembly info whcih namespace we should import?

Back 21

system.reflection

Front 22

Where is the Version Information Stored on a assembly ? Write the Namespace to load assemblies at runtime Can you allow a class to be inherited but prevent the method from being overridden ? What happens in memory when you box and unbox a value type ? Write a progtam to convert decimal to byte without using library function.

Back 22

Version information is stored in assembly in manifest;
Namespace to load assemblies at run time is System...

in boxing & unboxing... boxing=value type convert into
refrence type for boxing no explicit conversion is required
unboxing=unboxing is opposte of boxing refrence type convert
into value type for unboxing explicte conversion is required..?

Front 23

What is difference between a panel and GroupBox ?

Back 23

panel is container for group of controls like groupbox. But
only difference is for panel no caption whereas groupbox
contains caption property. By using this we can give one
collective name for group of controls.
Both panel and groupbox acts like a container to other
controls they help us a lot in some applications where we
want a group of controls or objects should be disabled or
enabled when a specific task is performed

the main difference is

group box has a hording where u can place a text of ure own

whereas a panel is just like a frame what we used in VB but
has a scrollbar(hs,vs)

Front 24

what is the use of console application?

Back 24

Console Applications are command-line oriented applications
that allow us to read characters from the console, write
characters to the console and are executed in the DOS
version. Console Applications are written in code and are
supported by the System.Console namespace.

Front 25

Is VB.NET object oriented? What are the inheritances does VB.NET support ?

Back 25

yes,vb.net is object oriented.
vb.net supports only
1)single level inheritance/simple inheritance
2) multi level inheritance
3)hierachical inheritance

vb.net doesn't supports
multiple,hybrid inheritance.

Front 26

What is difference between Abstract Class and Interface?

Back 26

?