*1. What is MCDC ?* Ans:

__Modified Condition/Decision Coverage__– Every point of entry and exit in the program has been invoked at least once, every condition in a decision in the program has taken all possible outcomes at least once, every decision in the program has taken all possible outcomes at least once, and each condition in a decision has been shown to independently affect.

**2. What is Condition?**Ans:

A Boolean expression containing no Boolean operators.

*3. What is Decision?*Ans :

A Boolean expression composed of conditions and zero or more Boolean operators. A decision without a Boolean operator is a condition. If a condition appears more than once in a decision, each occurrence is a distinct condition.

*MCDC Examples :*

*1.*MCDC for A||(B&&C)**Ans:**

**2. MCDC for A&&(B||C)**

**Ans:**

**3. MCDC for (A||B)&&(C||D)**

**Ans :**

**4. MCDC for (A&&B)||(C&&D)**

**Ans:**

**5. MCDC for (A&&B)||(C||D)**

**Ans :**

**6. MCDC for (A&&B)&&(C||D)**

**Ans :**

**7. MCDC for ((A&&B)||((!B)&&C) )**

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hi,

Please add your suggestions and questions

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Can you please tell me how to do mcdc for following expression

a&&b&&c||d

and what is difference between( a&&b&&c||d ) and ( ( a&&d ) && ( c||d ) )

can u please mail mcdc for these expression in er.chandralal@gmail.com

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Hi Chandralal,

Brackets () has the highest priority so if you separate the equation with brackets that will be clear picture and easy to understand and easy to write test cases.

come to your question a&&b&&c||d ,we can write MCDC for this equation also before that we need to know the priority of operators and proceed.

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Can I pls tell me how to get after 5sec in MCDC based on delay

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Hiii siva

i have done good job.

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Sorry U have done god job.

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helloo siva

Send me ur mail id.i will send u RTRT tools notes.So u cn also add it in dis blog.

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Hi,

Thank you

my mail id : ch.sivaprasadreddy@gmail.com.

please send me RTRT notes.

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Can you plz forward me that material at

sunilchrlp@hmail.com

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can you send me RTRT notes.

my mail id : sreekanth.force@gmail.com

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Could you send RTRT notes at govindm299@gmail.com Thanks in advance.

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i have send u RTRT notes .u cn check it.

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Hi,

Can you please Send RTRT notes and LDRA notes

my mail id : muduli.jitendra@gmail.com

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Please send me the rtrt notes to my mail id ankaiahgada433@gmail.com

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how is first row derived ?

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Hi,

The first row is just assumption based on that will change the one input and ensure that output is modified based on the changed input.

I hope answered your question ,please feel free to reply if you have any doubts.

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plz send me rtrt notes and interviews question on do178b and mcdc

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Hi Swati Kumari,

You can find the Interview questions of DO178B and MCDC Related in this blog itself. Still if you have any questions which are not there in this blog please post the questions i'll get you the answers.

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nd if possible can u expalin the concept of stub in RTRT tool.??

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briefly tell how to select the first line, wheather it is trial and error method, because for for long boolean expression, it is difficult.

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Hi Suri,

The first row is just assumption based on that will change the one input and ensure that output is modified based on the changed input.

I hope this answered your question, please feel free to reply if you have doubts.

Thank You

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Will post the same in website soon.

Thanks.

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please send me RTRT notes to srinu7728b@gmail.com

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Hi Can any one tell me what is the MCDC condition for (A&&B)||(B&&C)

Note: 2nd B is B-BAR

Please explain me

Thanks n Regards

Abhishek

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hi Abhishek,

i have updated the MCDC conditions for (A&&B)||(!B&&C),

please check and post the doubts if any.

Please post such questions ,so that it will be useful for all.

Regards

Siva

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thank u shiva,but i have a doubt in that MCDC condition should change only one input at every single instance.But you changed 2 input

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Hi Abhishek,

i hope your are talking about “!B”. Actually if i change B input automatically !B input get affected (opposite). that’s why i have shown the transition when the B is changing automatically !B also getting change.

Hope I answered your question.

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guys

can anyone having rtrt notes & mcdc explanation notes please send to umanathgovind@gmail.com

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Hi Sir,

Can different people have different set of inputs to show independency for each input. Because I was getting different set of combination to prove for the same set of equation

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Hi Shruthika,

Thanks for posting the query!!!

Each Individual have their own way of proving the MCDC with different combinations, but final moto is to prove the independancy.

Regards,

Siva

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solve (A||B)&&(A||C)?

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hi Rajan,

Please find the MCDC for the (A||B)&&(A||C)

A C B Expression Output

false true true true

false true false false

false false true false

true false false true

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(A||B)&&(A||C)

by DeMorgan’s Theorem

=> (A+B).(A+C) // ||=> +, &&=> .

=> A.A+A.B+A.C+B.C

=> A+A.B+A.C+B.C // A.A=1

=> A(1+B+C)+B.C // Taking A commonly out

=> A(1+(B+C))+B.C

=> A+B.C // 1+A=A

=> A||(B&&C)

=> A || ( B && C ) O/P

T F T T

F F T F

F T T T

F T F F

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(A||B)&&(A||C)

by DeMorgan’s Theorem

=> (A+B).(A+C) // ||=> +, &&=> .

=> A.A+A.B+A.C+B.C

=> A+A.B+A.C+B.C // A.A=1

=> A(1+B+C)+B.C // Taking A commonly out

=> A(1+(B+C))+B.C

=> A+B.C // 1+A=A

=> A||(B&&C)

=> A || ( B && C ) O/P

T F T T

F F T F

F T T T

F T F F

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Hi ,

where do i can download RTRT tool.

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hi

help me how to download RTRT free version .

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hai can anyone suggest the MC/DC solution for the equation

1) (A&&B)IIA’

2) (A&&B)’IIC

3) PLEASE SEND ME RTRT NOTES TO MY EMAIL ID…subrahmanya2011@gmail.com

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CAN ANY ONE SEND ME THE RTRT NOTES AND DO 178B INTERVIEW QUESTION AND MCDC COVERAGE NOTES

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very urgent help me out please

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Hi Sirisha,

You can find all the details of DO178B,RTRT and MCDC in this website itself.

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Do we need to toggle output between test cases? I mean, for two input AND gate, Is it required to add scenario 3 between 2 and 4?

Scenario 1 : T T -> T

Scenario 2 : T F -> F

Scenario 3 : T T -> T

Scenario 4 : F T -> F

Is there any case when adding extra scenario just to toggle output

will be helpful?

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Hi Akash,

it’s purely depends on the project basis, but yes to show the transformation toggling is needed.

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Hi

can anyone send rtrt notes very urgent

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In Mcdc coverage what type of errors will get?

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Template of ptu in rtrt? And write syntax for c=a/b in rtrt.

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Write test cases If(a>100)and(b<100) then c is true otherwise d is true

Limits: a is 1-10

b is 40-100 and c is

independent

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If((a&&b||c)&&(d||e)&&f).How many test cases u will write?

Please explain clearly as early as possible.

And also

(A&&B)||(A&&C)

(A||B)&&(A||C)

Mcdc coverage also explain clearly please

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Can any one send me RTRT NOTES and MCDC like (A&B)//(C bar &D bar). Please share me all MCDC RELATED

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WHAT IS MASKING MCDC??

EXPLAIN THE MCDC FOR (A&&B ) || (A&&D)

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Hi Siva sir,

Robustness cases are possible in MCDC or not?

If possible then please write the MCDC robustness cases for a^b^c..

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How to choose the first row for MCDC?

which row shall I take first?

can you explain please

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What will be the MCDC for (A||B)&&C ??