Question

1) Which of the following is NOT true about a Python variable?

a) A Python variable must have a value

b) A Python variable can be deleted

c) The lifetime of a Python variable is the whole duration of a program execution.  

d) A Python variable can have the value None.       

2) Given the code segment:

      

def f1(a, b = 2): if a: print(1) f1(1)

What is the result of executing the code segment?

a) Syntax error

b) Runtime error

c) No error     

d) Logic error

3) What is the output of executing the code segment?

a) A E    

b) B E

c) A

d) None of the above

4) Suppose k = {“a”: “apple”, “b”: "banana", “c”: "cherry"}  

Which statement(s) when executed does not cause a run-time error?

a) del k[“apple”]

b) k.sort(reverse = True)

c) k.get(“apple”, ‘Not found’)

d) All three statements do not cause a run-time error.

5) Which collection(s) is (are) the best choice for displaying the student scores and corresponding student numbers, in descending order of score?

a) A list where each element is a list. The element contains the student number and the score in a single list.    

b) A list with 2 elements which are lists. The first element contains the student numbers and the second element contains the scores.

c) A dictionary with student number as key and student score as value.

d) Two paired lists with student numbers in one list and the scores in another list

6) Which collection(s) is (are) the best choice for updating student score by student number?

a) A list where each element is a list. The element contains the student number and the score in a single list.

b) A list with 2 elements which are lists. The first element contains the student numbers and the second element contains the scores.

c) A dictionary with student number as key and student score as value.  

d) Two paired lists with student numbers in one list and the scores in another list

7) What is the output of executing the code segment?

a) A C E

b) C E   

c) A

d) C

8) Which control structure must always accompany the processing of data lines in a file?

a) selection

b) definite loop    

c) indefinite loop

d) All of the above

9) Which scenario requires a while loop?

a) Removing the negative numbers from a list

b) Reading user input for the student numbers of students who did not take an exam     

c) Reading each character in a file

d) Checking the score of a student based on student number given that the scores and student numbers are stored separately in two lists

10) Give the order of the precedence (from highest to lowest) for the operators: <, +, and, not.

a) not, and, <, +

b) +, <, not, and    

c) <, +, not, and

d) <, +, and, not

                 

Answer 1

`Hey,

Note: Brother if you have any queries related the answer please do comment. I would be very happy to resolve all your queries.

1) OPTION A IS CORRECT

2) OPTION C IS CORRECT

3) OPTION A IS CORRECT

4) OPTION C IS CORRECT

5) OPTION C IS CORRECT

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Kindly revert for any queries

Thanks.