## Download Question Paper of "Digital Circuits and Logic Designs 2" , Question Paper of BCA 2nd Semester, Subject Code : BSBC - 205, Paper ID 802091, Paper 8

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Roll  No……………..
Total  No.  of  Questions  :  07
BCA  (Sem.–2)
DIGITAL  CIRCUIT  &  LOGIC  DESIGN
Subject  Code  :  BC-205    (2007  to  2010  Batch)
Paper  ID  :  [B0209]
Time  :  3  Hrs. Max.  Marks  :  60
INSTRUCTION  TO  CANDIDATES  :
1. SECTION-A  is  COMPULSORY  consisting  of  TEN  questions  carrying
TWO  marks  each.
2. SECTION-B  contains  SIX  questions carrying  TEN marks  each  and  students
has  to  attempt  any  FOUR  questions.
SECTION-A
1. Write  briefly :
i) What are weighted and non  weighted codes?
ii) List various applications of logic gates.
iii) What is  encoder and decoder?  Explain.
iv) List various applications of shift register.
v) What is programmable counter?
vi) What is sequential logic circuit?
vii) Draw logic diagram of 4-input multiplexer.
viii)What  are limitations of K-Map?
ix) List various applications of multiplexer and de-multiplexer.
x) Convert binary number (1101.1101)  to octal
SECTION-B
2.       What is Logic Gate? What are its different types? Explain various applications of logic gates. 10
3.       What  is  binary  parallel  adder?  Draw  and  explain  the  working  of  4  bit
4.       Write short notes on the following :
(a) D  Flip Flop
(b) SOP  and  POS  Forms. 10
5.       What  is  Synchronous  counter?  How  it  is  different  from Asynchronous
counter? Draw and explain the working of Mod-6 Asynchronous counter.
10
6.       What is SIPO shift register? How it is different from  PIPO Shift register?
Draw and explain the working of 4 bit SIPO shift register. 10
7.       Explain the following :
(a) Error detection and correction  codes

(b) BCD. 10