Class - XI Computer important question

Class - XI Half yearly Examination Important Questions

1	What does ALU stand for?
2	Which device is both an input and output device?
3	Identify the type of software: Operating System a) System Software                b) Utility Software c) Application Software         d) Firmware
4	Convert 1010 (binary) to decimal.
5	Which function is used to find the length of a string in Python?
6	Name the Python data type used to store key-value pairs.
7	Define syntax error with an example.
8	Write the output of the following: print(3 * "Hi")
9	RAM is _______ (volatile/non-volatile).
10	Name any two arithmetic operators in Python.
11	Write the purpose of the break statement in Python.
12	Which Python keyword is used to define a function?
13	What is the extension of Python files?
14	Name the component of the CPU that interprets instructions.
15	What is the function of the MAR in a computer system?
16	Write a Python statement to get an integer input from the user.
17	Identify the correct output: a = 10  b = 3  print(a % b)
18	Which logic gate gives a high output when both inputs are different?
19	What is the use of elif in Python?
20	Name any two Python libraries.
21	What is the purpose of comments in Python?
22	Differentiate between high-level and low-level languages.
23	What is the role of the interpreter in Python execution?
24	List any two differences between lists and tuples in Python.
25	Write a Python program to input a number and print whether it is positive or negative.
26	What is a variable? How is it declared in Python?
27	Write any two features of Python.
28	Explain the term “flow of control” with respect to conditional statements in Python
29	Write a Python program to print all even numbers from 1 to 50 using a loop.
30	Explain the Input-Process-Output (IPO) cycle with an example.
31	Define the following terms with examples: a) Keyword b) Identifier c) Operator
32	Write a Python program to input three numbers and print the greatest among them using if-else.
33	Explain primary memory and secondary memory with examples.
34	Write a program to calculate the factorial of a number entered by the user.
35	Explain the basic components of a computer system with a diagram.
36	(a) Write a Python program to count the number of vowels in a string. (b) Write a Python program to input a number and check if it is a palindrome.
37	(a) Explain five functions of an operating system. (b) Describe the Von Neumann architecture with a labeled diagram.