Test Series - python

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Test Number 65/108

Q: Python supports the creation of anonymous functions at runtime, using a construct called __________
A. lambda
B. pi
C. anonymous
D. none of the mentioned
Solution: Python supports the creation of anonymous functions (i.e. functions that are not bound to a name) at runtime, using a construct called lambda. Lambda functions are restricted to a single expression. They can be used wherever normal functions can be used.
Q: What will be the output of the following Python code?

y = 6
z = lambda x: x * y
print z(8)
A. 48
B. 14
C. 64
D. None of the mentioned
Solution: The lambda keyword creates an anonymous function. The x is a parameter, that is passed to the lambda function. The parameter is followed by a colon character. The code next to the colon is the expression that is executed, when the lambda function is called. The lambda function is assigned to the z variable.
The lambda function is executed. The number 8 is passed to the anonymous function and it returns 48 as the result. Note that z is not a name for this function. It is only a variable to which the anonymous function was assigned.
Q: What will be the output of the following Python code?

lamb = lambda x: x ** 3
print(lamb(5))
A. 15
B. 555
C. 125
D. 125
Solution: None.
Q: Does Lambda contains return statements?
A. True
B. False
C. 
D. 
Solution: lambda definition does not include a return statement. it always contains an expression which is returned. Also note that we can put a lambda definition anywhere a function is expected. We don’t have to assign it to a variable at all.
Q: Lambda is a statement.
A. True
B. False
C. 
D. 
Solution: lambda is an anonymous function in Python. Hence this statement is false.
Q: Lambda contains block of statements.
A. True
B. False
C. 
D. 
Solution: None.
Q: What will be the output of the following Python code?

def f(x, y, z): return x + y + z
f(2, 30, 400)
A. 432
B. 24000
C. 430
D. No output 
Solution: None.
Q: What will be the output of the following Python code?

L = [lambda x: x ** 2,
         lambda x: x ** 3,
         lambda x: x ** 4]
 
for f in L:
	print(f(3))
A. 27 81 343
B. 6 9 12
C. 9 27 81
D. None of the mentioned
Solution: None.
Q: What will be the output of the following Python code?

min = (lambda x, y: x if x < y else y)
 min(101*99, 102*98)
A. 9997
B. 9999
C. 9996
D. None of the mentioned
Solution: None.

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