GATE-CS-2003 Question 16

Introduction

In the field of Computer Science, the GATE-CS (Graduate Aptitude Test in Engineering - Computer Science) examination is conducted to assess the technical knowledge and skills of candidates aspiring to pursue higher education or career opportunities in computer science. This particular question, Question 16 from the GATE-CS-2003, focuses on a specific problem related to computer programming.

Problem Description

Given an input string that represents a gate-level circuit, the task is to write a program to identify and print all the AND gates in the circuit. Each gate is represented by gate(i, inp1, inp2) format, where i is the gate number, and inp1 and inp2 are the input wires to the gate.

Input Format

The input string consists of multiple lines, with each line representing a gate. Each gate line follows the format gate(i, inp1, inp2), where i is a positive integer representing the gate number, and inp1 and inp2 are the input wires given as lowercase alphabets.

Output Format

The program should output a Markdown formatted text containing the gate numbers of all the AND gates in the circuit.

Sample Input

gate(1, a, b)
gate(2, c, d)
gate(3, e, f)

Sample Output

The AND gates in the circuit are:
- gate(1, a, b)
- gate(2, c, d)
- gate(3, e, f)

Implementation (Python)

Here's a sample implementation of the program in Python:

def find_and_gates(circuit):
    and_gates = []
    gates = circuit.split('\n')
    for gate in gates:
        if 'AND' in gate:
            and_gates.append(gate)
    return and_gates

input_circuit = '''
gate(1, a, b)
gate(2, c, d)
gate(3, e, f)
'''

and_gates = find_and_gates(input_circuit)
print('The AND gates in the circuit are:\n')
for gate in and_gates:
    print('- ' + gate)

Make sure to replace input_circuit with the actual input string when using the program.

Conclusion

In this question, we have discussed how to identify and print all the AND gates in a given gate-level circuit. This type of problem requires a good understanding of string manipulation and basic programming concepts. It is essential for programmers to be familiar with such problems as they are often encountered in real-world scenarios involving circuit design and analysis.