Operators, Expressions and Python Statements- Set 3

1. What will be the output of the following expression ?

    x = 4 
    print(x<<2) 
   

   1. 4
   2. 16
   3. 6
   4. 2
   Show Answer

   Answer : B
   Explain : In this use left shit (convert 4 into binary 0100 which become 010000- convert it into value - 16.)
2. What will be the output of the following expression ?
   print (7//2)
   print (-7//2)
   1. 3 -3
   2. 3 -4
   3. 4 -4
   4. 3 3
   Show Answer

   Answer : B
   Explain :
3. What will be the output of the following pseudocode, where ʌ represent XOR operation ?
   Integer a, b, c
   Set b = 4, a = 3
   c = a ^ b
   Print c
   1. 4
   2. 3
   3. 5
   4. 7
   Show Answer

   Answer : D
   Explain : Solve this using XOR operator.
4. What will be the output of the following ?
   Integer a, b
   Set a = 9, b = 5
   a = a mod (a - 3)
   b = b mod (b – 3)
   Print a + b
   1. 4
   2. 8
   3. 9
   4. 6
   Show Answer

   Answer : A
   Explain : a=9 % 6 = 3 and b=5%2 = 1. print(a+b)=print(3+1)=4.
5. What is the output of the following code ?
   print(bool(0), bool(3.14159), bool(23), bool(1.0+1j))
   1. True True False True
   2. False True False True
   3. False False False True
   4. False True True True
   Show Answer

   Answer : D
   Explain : bool(0) value is False, and every - True.
6. Which of the following operators has the highest precedence ?
   1. &
   2. *
   3. not
   4. +
   Show Answer

   Answer : B
   Explain : The highest precedence in these - * (multiplication).
7. Let us assume 4 is 100 in binary and 11 is 1011. What is the output of the following bitwise operators ?
   a = 4
   b = 11
   print(a | b)
   print(a >> 2)
   1. 15 or 1
   2. 14 or 1
   3. 16 or 2
   4. 17 or 2
   Show Answer

   Answer : A
   Explain : Use Or and right shit operator.
8. What will be the output of the following pseudo code, where ʌ represent XOR operation ?
   Integer a, b, c
   Set b = 5, a = 1
   c = a ^ b
   Print c
   1. 4
   2. 3
   3. 5
   4. 7
   Show Answer

   Answer : A
   Explain : Use XOR operation, first convert into binary and then perform xor operation.
9. What is the output of the following code ?
   a = 15
   b = 6
   print(a and b)
   print(a or b)
   1. True True
   2. False False
   3. 6 15
   4. 15 6
   Show Answer

   Answer : C
   Explain : Use and and or operator (Do it yourself).
10. What is the output of print((-3)** 2) ?
    1. -6
    2. -9
    3. 6
    4. 9
    Show Answer

    Answer : D
    Explain : ** is used for exponent. So -3**2=9.
11. What will be the output of the following Python code ? min(max(False,-3,-4), 2,7)
    1. -4
    2. -3
    3. 2
    4. False
    Show Answer

    Answer : D
    Explain : Value of False will be treated as 0.
12. What is the output of the following code ?
    a = 50
    b = a= a*5
    print(b)
    1. 250
    2. 10
    3. 50
    4. Syntax error
    Show Answer

    Answer : A
    Explain : b=25=50*5=250