sneha


{ City } hyderabad
< Country > india
* Profession * qa trainee
User No # 1208
Total Questions Posted # 0
Total Answers Posted # 58

Total Answers Posted for My Questions # 0
Total Views for My Questions # 0

Users Marked my Answers as Correct # 6103
Users Marked my Answers as Wrong # 971
Answers / { sneha }

Question { AZTEC, 12721 }

Integrity constraints means..? how many and what are they?


Answer

Integrity constraints provide a way of ensuring that
changes made to the database by authorized users do not
result in a loss of data consistency.
An integrity constraint can be any arbitrary predicate
applied to the database.
They may be costly to evaluate, so we will only consider
integrity constraints that can be tested with minimal
overhead.

Types of integrity constraints


(1) Non-null
(2) Key
(3) Referential integrity
(4) Attribute-based
(5) Tuple-based
(6) General assertions

plzz let me know if it's wrong


Is This Answer Correct ?    18 Yes 9 No

Question { 36332 }

What does extern mean in a function declaration?


Answer

extern is significant only with data declarations. In
function declarations, it can be used as a stylistic hint
to indicate that the function's definition is probably in
another source file, but there is no formal difference
between

extern int f();

and
int f();


Is This Answer Correct ?    91 Yes 14 No


Question { Geometric Software, 16513 }

GENUINE opposite?


Answer

bogus, counterfeit, fake, false, illegitimate, sham, unreal


Is This Answer Correct ?    15 Yes 1 No

Question { Geometric Software, 22495 }

Sum of two consecutive nos is 55, larger one is?


Answer

Given that the sum of two consecutive numbers is 55
Let the numbers be x and x+1
x+(x+1)=55
therefore x=27 and the largest number is 28
therefore the answer is 28

Is This Answer Correct ?    105 Yes 11 No

Question { ABC, 158537 }

Explain the advantage and disadvantage of ethernet ?


Answer

advantages:
1.Conceptually Simple :
Ethernet is simply daisy-chained together with
coax cable and "T" adapters. There are usually no hubs,
transcievers, or other devices used.

2.Relatively Inexpensive:
Due to the simplicity inherent in the design of Ethernet,
it can be an inexpensive technology to implement.

3.Noise Immunity :
The coaxial cable used in a Ethernet network is very well
shielded, and has a very high immunity from electrical
noise caused by outside sources.

Disadvantages:
1.Difficult To Change:
Reconfiguring a ethernet is somewhat difficult to do once
it is in place. Any changes to the network will result in
at least some "down time," as the bus must be broken and a
new section spliced in at the point of the break.

2.Fault Intolerant :
If any device or cable section attached to the network
fails, it will most likely make the entire network go down.

3.Difficult Troubleshooting
Ethernet networks are very difficult to troubleshoot. There
is no easy way to determine what node or cable section is
causing a problem, and the network must be troubleshot by
a "process of elimination." This can be very time consuming.

4.Specialized Cable
The RG-58A/U coaxial cable used in Ethernet networks can
not be used for any other purpose. In the event that the
network is changed to another type, then the cable will
have to be replaced.

Is This Answer Correct ?    207 Yes 109 No

Question { Honeywell, 8763 }

What is the advantage of Ring network ?


Answer

1.Very orderly network where every device has access to the
token and the opportunity to transmit .
2.Performs better than a star topology under heavy
network load .
3.Can create much larger network using Token Ring.

Is This Answer Correct ?    10 Yes 4 No

Question { HCL, 45321 }

Advantage of SRAM over DRAM ?


Answer

1.Simplicity: SRAMs don't require external refresh
circuitry or other work in order for them to keep their
data intact.
2.Speed: SRAM is faster than DRAM.
MAin advantage is that
Static RAM is a type of RAM that holds its data without
external refresh, for as long as power is supplied to the
circuit. This is contrasted to dynamic RAM (DRAM), which
must be refreshed many times per second in order to hold
its data contents. SRAMs are used for specific applications
within the PC, where their strengths outweigh their
weaknesses compared to DRAM in terma of speed and sinplicity


Let me know if there is any another view


Is This Answer Correct ?    65 Yes 9 No

Question { Hughes, 5348 }

what is the diff b/n c and c++

a. dynamic scoping
b. nested switching
c. declaration of variables in any code block
d. separation of compilation and linking


Answer

declaration of variables in any code block

Is This Answer Correct ?    5 Yes 1 No

Question { BFL, 4451 }

process means?


Answer

A 'process' is an execution stream in the context of a
particular process state.
An execution stream is a sequence of instructions.
Process state determines the effect of the instructions. It
usually includes (but is not restricted to):
Registers
Stack
Memory (global variables and dynamically allocated memory)
Open file tables
Signal management information
*Key concept: processes are separated: no process can
directly affect the state of another process.
->Process is a key OS abstraction that users see - the
environment you interact with when you use a computer is
built up out of processes.
The shell you type stuff into is a process.
When you execute a program you have just compiled, the OS
generates a process to run the program.
even Your WWW browser is a process.

Is This Answer Correct ?    2 Yes 1 No

Question { BFL, 11586 }

polymorphism means?


Answer

It is a feature that allows one interface to be used for
general class of actions. The specific action is determined
by the exact nature of the situation. In general
polymorphism means "one interface, multiple methods", This
means that it is possible to design a generic interface to
a group of related activities. This helps reduce complexity
by allowing the same interface to be used to specify a
general class of action. It is the compiler's job to select
the specific action (that is, method) as it applies to each
situation

Is This Answer Correct ?    15 Yes 1 No

Question { Patni, 24871 }

in unix echo is used for


Answer

The echo command echoes its arguments

Another important use of the echo command is to toggle
echoing of commands on and off in batch files.

echo on turns on echoing of commands
echo off turns off echoing of commands



Is This Answer Correct ?    6 Yes 19 No

Question { Artech, 27571 }

What is Software Engineering? Please do explain in Brief.


Answer

Software engineering (SE) is the profession that creates
and maintains software applications by applying
technologies and practices from computer science, project
management, engineering, application domains and other
fields.

Software engineering, like traditional engineering
disciplines, deals with issues of cost and reliability.
Some software applications contain millions of lines of
code that are expected to perform properly in the face of
changing conditions, making them comparable in complexity
to the most complex modern machines.

Is This Answer Correct ?    44 Yes 7 No

Question { IBM, 17266 }

In a square , all the mid points are joined. the inner square
is shaded. If the area of the square is A, what is the
shaded area?


Answer

the shaded area is half the area of the square (having area
A)
therefore answer is A/2

Is This Answer Correct ?    36 Yes 7 No

Question { IBM, 15455 }

The very first process created by the kernal that runs
till the kernal process is haltes is


Answer

It is init

Is This Answer Correct ?    17 Yes 3 No

Question { Mascot, 9209 }

What is meant byStatic Variable ?


Answer

A static can only be accessed from the function in which it
was declared, like a local variable. The static variable is
not destroyed on exit from the function, instead its value
is preserved, and becomes available again when the function
is next called. Static variables are declared as local
variables, but the declaration is preceeded by the word
static.




Is This Answer Correct ?    7 Yes 2 No

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