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Science (English Medium) Class 12 - CBSE Important Questions

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Draw the Logic Circuit of the following Boolean Expression

(U' + v).(V' + W')

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Application of Boolean Logic - Digital Electronic Circuit Design Using Basic Logic Gates (NOT, AND, OR, NAND, NOR)

Derive a Canonical POS expression for a Boolean function FN, represented by the following truth truth table:

X y z FN (X, Y, Z)
0 0 0 1
0 0 1 1
0 1 0 0
0 1 1 0
1 0 0  1
1 0 1 0
1 1 0 0
1 1 1 1
Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Obtaining Sum of Product (SOP) and Product of Sum (POS) Form the Truth Table

Reduce the following Boolean Expression to its simplest form using K-Map:

`G(U, V,W, Z) = sum(3,5 , 6 , 7 , 11 , 12 ,13, 15)`

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Reducing Boolean Expression (SOP and POS) to Its Minimal Form

State DeMorgan's Laws of Boolean Algebra and verify them using a truth table.

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: DeMorgan’S Law/Theorem and Their Applications

Draw the Logic Circuit of the following Boolean Expression using only NOR Gates

(A+B).(C+D)

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Application of Boolean Logic - Digital Electronic Circuit Design Using Basic Logic Gates (NOT, AND, OR, NAND, NOR)

Derive a Canonical POS expression for a Boolean function G, represented by the following truth table:

X Y Z G(X, Y, Z)
0 0 0 0
0 0 1 0
0 1 0 1
0 1 1 0
1 0 0 1
1 0 1 1
1 1 0 0
1 1 1 1

 

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Obtaining Sum of Product (SOP) and Product of Sum (POS) Form the Truth Table

Reduce the following Boolean Expression to its simplest form using K-Map:

`E (U, V, Z, W) = sum (2, 3 , 6, 8, 9, 10, 11 , 12 , 13 )`

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Use of Karnaugh Map for Minimization of Boolean Expressions (Up to 4 Variables)

Verify the following using Boolean Laws : U'+V = U'V'+ U' .V + U.V

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Commutative Law

Draw the Logic Circuit for the following Boolean Expression: (X'+Y).Z + W'

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Application of Boolean Logic - Digital Electronic Circuit Design Using Basic Logic Gates (NOT, AND, OR, NAND, NOR)

Derive a Canonical POS expression for a Boolean function F, represented by the following truth table

P Q R F(P,Q,R)
0 0 0 1
0 0 1 0
0 1 0 0
0 1 1 1
1 0 0 1
1 0 1 0
1 1 0 0
1 1 1 1

 

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Obtaining Sum of Product (SOP) and Product of Sum (POS) Form the Truth Table

Reduce the following Boolean Expression to its simplest form using K-Map

`F (X, Y, Z, W) = sum (0, 1, 4, 5, 6, 7, 8, 9, 11, 15)`

Appears in 1 question paper
Chapter: [9] C++ Boolean Algebra
Concept: Use of Karnaugh Map for Minimization of Boolean Expressions (Up to 4 Variables)

Which of the following is an invalid datatype in Python?

Appears in 1 question paper
Chapter: [1] Exception Handling in Python
Concept: Introduction of Exception Handling in Python

Which of the following statement(s) would give an error after executing the following code?

S="Welcome to class XII" # Statement 1
print(S)       #Statement 2
S="Thank you"    # Statement 3
S[0]= '@'      # Statement 4
S=S+"Thank you"   # Statement 5
Appears in 1 question paper
Chapter: [1] Exception Handling in Python
Concept: Built-in Exceptions in Python

Rao has written a code to input a number and check whether it is prime or not. His code is having errors. Rewrite the correct code and underline the corrections made.

def prime():
n=int(input("Enter number to check :: ")
for i in range (2, n//2):
if n%i=0:
print("Number is not prime \n")
break
else:
print("Number is prime \n’)
Appears in 1 question paper
Chapter: [1] Exception Handling in Python
Concept: Built-in Exceptions in Python

Predict the output of the Python code given below:

def Diff(N1,N2):
 if N1>N2:
 return N1-N2
 else:
 return N2-N1

NUM= [10,23,14,54,32]
for CNT in range (4,0,-1):
 A=NUM[CNT]
 B=NUM[CNT-1]
 print(Diff(A,B),'#', end=' ')
Appears in 1 question paper
Chapter: [1] Exception Handling in Python
Concept: Handling Exceptions in Python

Atharva is a Python programmer working on a program to find and return the maximum value from the list. The code written below has syntactical errors. Rewrite the correct code and underline the corrections made.

def max_num (L):
        max=L(O)
        for a in L:
                if a > max
                 max=a
        return max
Appears in 1 question paper
Chapter: [1] Exception Handling in Python
Concept: Syntax Errors in Python

Which of the following operators will return either True or False?

Appears in 1 question paper
Chapter: [1] Exception Handling in Python
Concept: Introduction of Exception Handling in Python

“In a Python program, if a break statement is given in a nested loop, it terminates the execution of all loops in one go.”

Appears in 1 question paper
Chapter: [1] Exception Handling in Python
Concept: Handling Exceptions in Python

An exception may be raised even if the program is syntactically correct.

Appears in 1 question paper
Chapter: [1] Exception Handling in Python
Concept: Exceptions in Python

The code given below accepts a number as an argument and returns the reverse number. Observe the following code carefully and rewrite it after removing all syntax and logical errors. Underline all the corrections made.

define revNumber (num) :
      rev = 0
      rem = 0
      While num > 0:
            rem ==num %10
            rev = rev*10 + rem
            num = num//10
            return rev
print (revNumber (1234))
Appears in 1 question paper
Chapter: [1] Exception Handling in Python
Concept: Syntax Errors in Python
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