| 2581 |
What does the readlines() method return? |
Computer Science/Informatics Practices
Text files |
Easy |
| 2582 |
A file contains the text PYTHON PROGRAM. After f = open(...) in read mode, s = f.read(6) is executed. What is… |
Computer Science/Informatics Practices
Text files |
Medium |
| 2583 |
For the same file containing PYTHON PROGRAM, f.seek(7) is followed by print(f.read(3)). What is printed? |
Computer Science/Informatics Practices
Text files |
Medium |
| 2584 |
A file has lines one, two and three. It is opened with 'w' mode, f.write("x") is executed and the file is clo… |
Computer Science/Informatics Practices
Text files |
Hard |
| 2585 |
Which module is used in Python to store objects such as lists in a binary file? |
Computer Science/Informatics Practices
Binary files |
Easy |
| 2586 |
Which file mode should be used to write pickled data to a new binary file? |
Computer Science/Informatics Practices
Binary files |
Easy |
| 2587 |
What is the correct form of the statement to write a dictionary d into the binary file object f? |
Computer Science/Informatics Practices
Binary files |
Medium |
| 2588 |
The process of converting a Python object into a byte stream is called |
Computer Science/Informatics Practices
Binary files |
Medium |
| 2589 |
A program writes a list and then a dictionary with two pickle.dump() calls, then reads the file with pickle.l… |
Computer Science/Informatics Practices
Binary files |
Hard |
| 2590 |
Which principle does a stack follow? |
Computer Science/Informatics Practices
Stack |
Easy |
| 2591 |
Removing an element from an empty stack is called |
Computer Science/Informatics Practices
Stack |
Easy |
| 2592 |
Starting with an empty Python list s, the operations s.append(10), s.append(20), s.pop(), s.append(30), s.app… |
Computer Science/Informatics Practices
Stack |
Medium |
| 2593 |
Which feature of a web browser is a typical application of a stack? |
Computer Science/Informatics Practices
Stack |
Medium |
| 2594 |
The characters of "CAT" are pushed one by one onto a stack and then all popped and joined in the order popped… |
Computer Science/Informatics Practices
Stack |
Hard |
| 2595 |
What is the postfix form of the infix expression A + B * C? |
Computer Science/Informatics Practices
Expression notation |
Easy |
| 2596 |
Which data structure is used to evaluate a postfix expression? |
Computer Science/Informatics Practices
Expression notation |
Easy |
| 2597 |
What is the value of the postfix expression 4 5 + 3 2 − *? |
Computer Science/Informatics Practices
Expression notation |
Medium |
| 2598 |
What is the postfix form of (A + B) * (C − D)? |
Computer Science/Informatics Practices
Expression notation |
Medium |
| 2599 |
What is the value of the postfix expression 8 2 3 * − 4 +? |
Computer Science/Informatics Practices
Expression notation |
Hard |
| 2600 |
Which principle does a queue follow? |
Computer Science/Informatics Practices
Queue |
Easy |