Computer Aptitude for SBI PO – Set 3

Computer Aptitude Questions for SBI PO 2017. 

Directions (1-5): A student has come to a University to get enrolled. The data flow diagram shows the procedure followed by university for the enrollment of a student

  1. If the registration form filled by the student is declared invalid, then to which of the following steps does the ‘No’ answer of ‘Valid?’ condition does go to?
    A) Asks Course
    B) Enrollment Cancel
    C) Fill Registration Form
    D) Either A or C
    E) Either B or C
    View Answer
      Option E
    After Valid? Condition, there are 2 things. First the candidate has filled some data wrong in form, then the candidate will be asked to fill another form.
    But if something filled in form by the candidate is against the policies of university, his enrollment can be cancelled.  So from given options, E) is the best to choose
  2. Which of the following condition will decrease the data flow diagram to minimum number of steps?
    A) The student has the required course fee.
    B) The student is ready to get enrolled in any course.
    C) The student has already collected the registration form before any enquiry.
    D) Both A and B
    E) All of A, B and C
    View Answer
      Option B
    A) If the student has required fee, then also the teller will ask for fee payment and will enquire if he/she has sufficient funds.
    B) If the student is ready to get enrolled in any course, he will just ask which course is available and will fill the form out. This will decrease 1 step of asking about particular course
    C) Only collecting registration form will not eliminate any step.  
  3. If after knowing the course fee, it is found that the candidate does not have the sufficient amount, but he wants to take admission in the same university. Then which another step can be definitely followed after ‘No’ answer of ‘Funds Available?’ condition?
    A) The candidate should fill another registration form.
    B) The candidate gets the required amount from home.
    C) The candidate enquires about another course
    D) The candidate’s candidature will surely be cancelled
    E) The candidate asks to calculate fee for another course.
    View Answer
      Option C
    A): Filling another registration form without knowing about the course is available or not is wastage of time
    B): Going to home and getting back the required amount is not descripted anywhere in diagram. So cannot be definitely said about this step.
    C): can definitely be the step. He enquires about some course for which he has sufficient funds and proceed further.
    E): For getting the amount calculated, he will have to fill out form for another course and get it validated.
  4. Which of the following step is logically missing in the given data flow diagram?
    A) Which transport facility will the candidate opt for coming to university.
    B) If the candidate is already registered or not
    C) The candidate is eligible or not.
    D) Candidate’s enquiry about class timings, holidays, etc.
    E) None of these
    View Answer
      Option A
    A) is a missing step because of the candidate opts for any of the university’s transport system, then its fees will also have to be calculated.
    B) This condition does not make sense.
    C) condition is covered in step where validation of form is done.
    The given data flow diagram depicts the University’s procedure. So D cannot be one of the steps in given diagram.


Directions (5-10): Study the following information and answer the questions that follow:

In a certain code, the symbol for 0 is # and for 1 is @. The numbers greater than 1 are to be represented using these two symbols only. The value of the symbol for 1 doubles itself every time it shifts one place to the left. Study the following examples.

‘0’ is written as #              ‘1’ is written as @

‘2’ is written as @#           ‘3’ is written as # @@

‘4’ is written as @##        ‘5’ is written as @#@

And so on

  1. What will be (@##@#@) – (@#@@)
    A) 22
    B) 32
    C) 26
    D) 30
    E) 33
    View Answer
     Option C

    (@##@#@) + (@@#) – (@#@@)
    = (100101) –  (1011)
    100101 =  25*1 + 24*0 + 23*0 + 22*1 + 21*0 + 20*1
    1011 = 23*1 + 22*0 + 21*1 + 20*1
    = 37 – 11 = 26
  2. What will be (@#@# – 1) × (@@@# – 1)
    A) @@@#@@#
    B) @@#@@#@
    C) @@@@#@
    D) @@@#@#@
    E) @@@###@
    View Answer
     Option D

    @#@#  = 10
    @@@#  = 14
    9*13 = 117
  3. What will be √[(@###@) + (@#@#) + (@##@##@)]
    A) 8
    B) 10
    C) 11
    D) 13
    E) 12
    View Answer
     Option B

    @###@  – 17
    @#@#  – 10
    @##@##@  – 73
    So √[(@####) + (@##@)] + (@##@##@)  = 17 + 10 + 73 = 100
  4. What will be the remainder of when (@@@#@#@) is divided by (@##@@)
    A) @@#
    B) @#@
    C) @##
    D) @#
    E) @@
    View Answer
     Option E

    @@@#@#@  = 1110101
    = 26*1 + 25*1 + 24*1 + 23*0 + 22*1 + 21*0 + 20*1
    = 117
    @##@@  – 19
    So remainder of (117/19) = 3 = (11) = (@@)
  5. What is the HCF of (@@#@@#) and (@@####)
    A) @##
    B) @@@
    C) @#@
    D) @@#
    E) None of these
    View Answer
     Option D

    @@#@@# = 54
    @@#### = 48
    54 = 6*9 and 48 = 6*8
    So HCF of (54 and 48) = 6
    6 = 110 = @@#
  6. What will be (@#@#) + (@#@@@#)
    A) 50
    B) 52
    C) 56
    D) 48
    E) 45
    View Answer
     Option C

    @#@# = 1010 = 10
    @#@@@# = 101110 = 32 + 8 + 4 + 2 = 46


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41 Thoughts to “Computer Aptitude for SBI PO – Set 3”

  1. Pradeep Narayan

    dfd samj nhi aaya mam…… explain the 2nd and 3rd one….mam…:(((

      1. Pradeep Narayan

        2nd one and 3rd one ….mam..:))

        1. explanation is given na
          usme kya doubt hai ??

          1. Pradeep Narayan

            step kha reduce ho rha h mam…:))))))

          2. Pradeep Narayan

            ask course hatega aisa mam…?????

          3. Pradeep Narayan

            okzzz mam now got the point aise questions k liye kya krna padega means any extra thinking to be applied ya statement assumptions ki tarh jo dia h srf usi me se deduce krna h mam…:)))))

          4. Yes usi me se.
            Jo pta hai vo use nhi karna.
            Cz is dfd me u can think ki vo phle hi course fees pta krke rakhta. Money utna hi leke ata.
            I mean normally we people do like this only.
            But jo dfd me h vahi follow karo

          5. Pradeep Narayan

            yaaaa…..mam same mistk i followed the abov point…….thank yuu mam so mch…:)))))

          6. Ek step reduce hua na.
            Phle usne course ka naam btaya tha. N then pta ki vo available hai ya nhi. – 2 steps
            Par ab usne yhi puch liya ki konsa available hai. – 1 step

      2. Pradeep Narayan

        mam in 6th que something rong 1010 =10 1001 =9 mam
        1011 =13 and 1010 =14 in that case 140 is coming..instead of 117…mam..;)))

    1. Bharat Chauhan

      que 6me 10aur 14 kese aaye ye samja do nayi computer apptitude samaj nahi aa rahi h..koi link ho to do samaj ne k iye

  2. Aakanksha Berwal

    In Q6, why you’ve subtracted 1 from both the no. and then multiplied!.

  3. sachin shukla Banker of 2017

    ye coding system smjh nai ata 5–10 koi smjha do??????????????

    1. Pradeep Narayan

      symbol ones #@????

      1. sachin shukla Banker of 2017


        1. Pradeep Narayan

          mtlb jo # @ wale symbol k questions h uski bt kr rhr h aap????

          1. sachin shukla Banker of 2017

            haaan ji likha to h 5-10

          2. Pradeep Narayan

            then use binary conversion of decimal no…..:)))

          3. sachin shukla Banker of 2017

            agr possible ho to step by step clear kr do???

          4. Pradeep Narayan

            jase 10 decimal no h na decimal means base 10
            isko divide krte h 2 se to 5 tyms rem =0
            now 5 ko devide 2 se to 2 tyms rem =1
            now 2 ko divide krte h 2 se to 1 tyms rem =0
            now 1 ko divide kro 2 se to zro tyms rem =1
            now arrange the remainders frm last to first = 10 =1010
            aise hi same procedure apply krna h …hope u got my point…:))

          5. See 1st set for explanations.
            N see the comments in 2nd set

          6. Trisha

            u should see videos for it on youtube if not getting it by written steps..

          7. sachin shukla@Target SBI Mains

            okk now i have fully understood this topic

  4. Diya

    ma’am ques 6

    @#@# = 10

    @@@# = 14

    in dono ki value 10 and 14 kaise aayi???

    1. @#@# = 1010
      2^3 * 1 + 2^2 * 0 + 2^1 *1 + 2^0 * 0
      8 + 2

      Next vala try karo khud

      1. Diya

        thank u ma’am 🙂
        next one is done


    @Shubhra_AspirantsZone:disqus maam in q4 why ‘c’ cannot be a right option

  6. •?((¯°·._.• ค๓๒เкค •._.·°¯))؟•

    thankyou mam 🙂


    Q1 me C kese ho sakta he ? Diagram me to enrollment cancel he na

    1. see that the no option of Valid is not connected to anywhere
      so depending on conditions, again filling of form can be there or enrollment cancel

      1. आर के - आशिक (लवली)

        Could you please update more binary calculation quizzes for sbi po mains??

  8. आर के - आशिक (लवली)

    Could you please update more binary calculation quizzes for sbi po mains??

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