McqMate
Chapters
| 1. |
Is Python case sensitive when dealing with identifiers? |
| A. | yes |
| B. | no |
| C. | machine dependent |
| D. | none of the mentioned |
| Answer» A. yes | |
| Explanation: case is always significant. | |
| 2. |
What is the maximum possible length of an identifier? |
| A. | 31 characters |
| B. | 63 characters |
| C. | 79 characters |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| Explanation: identifiers can be of any length. | |
| 3. |
Which of the following is invalid? |
| A. | _a = 1 |
| B. | a = 1 |
| C. | str = 1 |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| Explanation: all the statements will execute successfully but at the cost of reduced readability. | |
| 4. |
Which of the following is an invalid variable? |
| A. | my_string_1 |
| B. | 1st_string |
| C. | foo |
| D. | _ |
| Answer» B. 1st_string | |
| Explanation: variable names should not start with a number. | |
| 5. |
Why are local variable names beginning with an underscore discouraged? |
| A. | they are used to indicate a private variables of a class |
| B. | they confuse the interpreter |
| C. | they are used to indicate global variables |
| D. | they slow down execution |
| Answer» A. they are used to indicate a private variables of a class | |
| Explanation: as python has no concept of private variables, leading underscores are used to indicate variables that must not be accessed from outside the class. | |
| 6. |
Which of the following is not a keyword? |
| A. | eval |
| B. | assert |
| C. | nonlocal |
| D. | pass |
| Answer» A. eval | |
| Explanation: eval can be used as a variable. | |
| 7. |
All keywords in Python are in |
| A. | lower case |
| B. | upper case |
| C. | capitalized |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| Explanation: true, false and none are capitalized while the others are in lower case. | |
| 8. |
Which of the following is an invalid statement? |
| A. | abc = 1,000,000 |
| B. | a b c = 1000 2000 3000 |
| C. | a,b,c = 1000, 2000, 3000 |
| D. | a_b_c = 1,000,000 |
| Answer» B. a b c = 1000 2000 3000 | |
| Explanation: spaces are not allowed in variable names. | |
| 9. |
Which of the following cannot be a variable? |
| A. | __init__ |
| B. | in |
| C. | it |
| D. | on |
| Answer» B. in | |
| Explanation: in is a keyword. | |
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