WorksheetsCOA Unit 1
Total questions: 25
Worksheet time: 13mins
1. Abstraction in computers mainly helps to
A) Increase hardware size
B) Hide unnecessary details
C) Reduce memory
D) Slow execution
2. Which level of abstraction is closest to hardware?
A) Application level
B) Operating system level
C) Logic gate level
D) High-level language level
3. Abstraction allows programmers to focus on
A) Circuit design
B) Machine codes
C) Problem solving
D) Hardware faults
4. Which unit performs arithmetic and logical operations?
A) Control Unit
B) Memory Unit
C) ALU
D) Input Unit
5. Which unit controls the operations of all other units?
A) ALU
B) Control Unit
C) Output Unit
D) Register
6. Which unit stores instructions and data?
A) ALU
B) Control Unit
C) Memory Unit
D) Input Unit
7. Keyboard is an example of
A) Output unit
B) Storage unit
C) Input unit
D) Control unit
8. Von Neumann architecture uses
A) Separate memory for data and instructions
B) Single memory for data and instructions
C) Only registers
D) Cache only
9. The main drawback of Von Neumann architecture is
A) Large size
B) High cost
C) Von Neumann bottleneck
D) Low storage
10. Which component is common in Von Neumann model?
A) CPU
B) Separate instruction memory
C) Multiple ALUs
D) Cloud storage
11. In Von Neumann model, instructions are executed
A) Randomly
B) In parallel
C) Sequentially
D) Backwards
12. Moore’s Law states that the number of transistors on a chip doubles approximately every
A) 6 months
B) 1 year
C) 18-24 months
D) 5 years
13. Moore’s Law mainly refers to increase in
A) Memory size
B) Transistor count
C) Screen size
D) Power consumption
14. Moore’s Law was proposed by
A) Alan Turing
B) Charles Babbage
C) Gordon Moore
D) John von Neumann
15. Performance of a computer system is measured by
A) Size
B) Cost
C) Execution time
D) Color
16. Which factor affects computer performance?
A) Clock speed
B) Memory
C) CPU Design
D) All of the above
17. Faster CPU means
A) More heat
B) Less memory
C) Lower execution time
D) Larger size
18. Computers represent data using
A) Decimal number
B) Binary number
C) Octal number
D) Roman number
19. Binary system uses how many digits?
A) 2
B) 8
C) 10
D) 16
20. Which of the following is a binary number?
A) 123
B) 89
C) 1011
D) 77
21. ASCII is used to represent
A) Images
B) Number only
C) Characters
D) Sound
22. Addition, subtraction, AND, OR are examples of
A) Input operations
B) Storage operations
C) Logical operations
D) Processing operations
23. Which operation is used to compare two values?
A) Addition
B) AND
C) Logical operation
D) Shift
24. Left shift operation in binary is equivalent to
A) Division by 2
B) Multiplication by 2
C) Adding 1
D) Subtracting 1
25. Which unit performs basic operations on data?
A) Memory
B) Input unit
C) ALU
D) Output unit
