Problem Solving And Python Programming Set 29

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This set of Problem Solving and Python Programming Multiple Choice Questions & Answers (MCQs) focuses on Problem Solving And Python Programming Set 29

Q1 | On assigning a value to a variable inside a function, it automatically becomes a global variable.

true

false

Q2 | What happens if a local variable exists with the same name as the global variable you want to access?

error

the local variable is shadowed

undefined behavior

the global variable is shadowed

Q3 | print(a)

junk value

error

Q4 | f() x

error

junk value

Q5 | Which is the most appropriate definition for recursion?

a function that calls itself

a function execution instance that calls another execution instance of the same function

a class method that calls another class method

an in-built method that is automatically called

Q6 | Only problems that are recursively defined can be solved using recursion.

true

false

Q7 | Which of these is false about recursion?

recursive function can be replaced by a non-recursive function

recursive functions usually take more memory space than non-recursive function

recursive functions run faster than non- recursive function

recursion makes programs easier to understand

Q8 | ,i+j) print(test(4,7))

infinite loop

Q9 | 5 RECURSION

011

110

infinite loop

Q10 | What is tail recursion?

a recursive function that has two base cases

a function where the recursive functions leads to an infinite loop

a recursive function where the function doesn’t return anything and just prints the values

a function where the recursive call is the last thing executed by the function

Q11 | , tot-2)

both a() and b() aren’t tail recursive

both a() and b() are tail recursive

b() is tail recursive but a() isn’t

a() is tail recursive but b() isn’t

Q12 | Which of the following statements is false about recursion?

every recursive function must have a base case

infinite recursion can occur if the base case isn’t properly mentioned

a recursive function makes the code easier to understand

every recursive function must have a return value

Q13 | Recursion and iteration are the same programming approach.

true

false

Q14 | What happens if the base condition isn’t defined in recursive programs?

program gets into an infinite loop

program runs once

program runs n number of times where n is the argument given to the function

an exception is thrown

Q15 | Which of these is not true about recursion?

making the code look clean

a complex task can be broken into sub- problems

recursive calls take up less memory

sequence generation is easier than a nested iteration

Q16 | Which of these is not true about recursion?

it’s easier to code some real-world problems using recursion than non-recursive equivalent

recursive functions are easy to debug

recursive calls take up a lot of memory

programs using recursion take longer time than their non-recursive equivalent

Q17 | Which of the following commands will create a list?

list1 = list()

list1 = []

list1 = list([1, 2, 3])

all of the mentioned

Q18 | What is the output when we execute list(“hello”)?

[‘h’, ‘e’, ‘l’, ‘l’, ‘o’]

[‘hello’]

[‘llo’]

[‘olleh’]

Q19 | Suppose list1 is [2445,133,12454,123], what is max(list1)?

2445

133

12454

123

Q20 | Suppose list1 is [3, 5, 25, 1, 3], what is min(list1)?

Q21 | Suppose list1 is [1, 5, 9], what is sum(list1)?

error

Q22 | To shuffle the list(say list1) what function do we use?

list1.shuffle()

shuffle(list1)

random.shuffle(list1)

random.shufflelist(list1)

Q23 | Suppose list1 is [4, 2, 2, 4, 5, 2, 1, 0], Which of the following is correct syntax for slicing operation?

print(list1[0])

print(list1[:2])

print(list1[:-2])

all of the mentioned

Q24 | Suppose list1 is [2, 33, 222, 14, 25], What is list1[-1]?

error

none

Q25 | Suppose list1 is [2, 33, 222, 14, 25], What is list1[:-1]?

[2, 33, 222, 14]

error

[25, 14, 222, 33, 2]

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