1
GATE CSE 2003
+2
-0.6
Consider the $$ALU$$ shown below

If the operands are in $$2's$$ complement representation, which of the following operations can be performed by suitably setting the control lines $$K$$ and $${C_0}$$ only ( + and - denote addition and subtraction respectively)?

A
$$A+B,$$ and $$A-B,$$ but not $$A+1$$
B
$$A+B,$$ and $$A+1,$$ but not $$A-B$$
C
$$A+B,$$ but not $$A-B,$$ or $$A+1$$
D
$$A+B,$$ and $$A-B,$$ and $$A+1$$
2
GATE CSE 2002
+2
-0.6
Consider the following multiplexer where $$10, 11, 12, 13$$ are four data input lines selected by two address line combinations $${A_1}\,{A_0} = 00,01,10,11$$ respectively and $$f$$ is the output of the multiplex (or). $$EN$$ is the Enable input.

The function $$f(x,y,z)$$ implemented by the above circuit is

A
$$xyz'$$
B
$$xy+z$$
C
$$x+y$$
D
None of the above
3
GATE CSE 2001
+2
-0.6
Consider the circuit shown below. The output of a $$2:1$$ Mux is given by the function $$(ac+bc)$$

Which of the following is true?

A
$$f = x_1^1 + {x_2}$$
B
$$f = x_1^{\,1} + {x_2} + {x_1}x_2^{\,1}$$
C
$$f = {x_1}{x_2} + {x_1}^1{x_2}^1$$
D
$$f = {x_1} + x_2^1$$
4
GATE CSE 1996
+2
-0.6
Consider the circuit in Fig. Which has a four bit binary number $${b_3}\,{b_2}\,{b_1}\,{b_0}\,$$ as input and a five bit binary number $${d_3}\,{d_2}\,{d_1}\,{d_0}\,$$ as output. The circuit implements:
A
Binary to Hex conversion
B
Binary to $$BCD$$ conversion
C
Binary to grey code conversion
D
Binary to radix -$$12$$ conversion
GATE CSE Subjects
Theory of Computation
Operating Systems
Algorithms
Digital Logic
Database Management System
Data Structures
Computer Networks
Software Engineering
Compiler Design
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General Aptitude
Discrete Mathematics
Programming Languages
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