Machine-Level Data Representation: Class 10 Chapter 1 MCQ Guide
Class 10 Computer Science MCQs: Test your understanding of binary, hexadecimal, ASCII, operating systems, and memory management. Learn from detailed, solved MCQs for exam success.
Q1: What is the binary representation of the decimal number -43 using 8-bit two’s complement notation?
- a) 10101011
- b) 11010101
- c) 11010101
- d) 11101011
Answer: d) 11101011
Q2: Which of the following binary numbers corresponds to the hexadecimal number 3FA7?
- a) 0011 1111 1010 0111
- b) 1100 0011 1101 1000
- c) 1011 1100 0011 0111
- d) 0111 1011 1011 1100
Answer: a) 0011 1111 1010 0111
Q3: How does the ASCII code for the character ‘Z’ (90 in decimal) look in binary?
- a) 01011010
- b) 01001110
- c) 01011000
- d) 01101001
Answer: a) 01011010
Q4: In an 8-bit signed integer representation, what is the range of values that can be represented?
- a) -127 to 128
- b) -128 to 127
- c) 0 to 255
- d) -256 to 255
Answer: b) -128 to 127
Q5: How many different values can be represented with a 10-bit binary number?
- a) 256
- b) 1024
- c) 512
- d) 2048
Answer: b) 1024
Q6: Which of the following is NOT a task performed by an operating system?
- a) Process Management
- b) Memory Management
- c) Email Management
- d) Device Management
Answer: c) Email Management
Q7: Which type of operating system allows multiple tasks to be performed at the same time?
- a) Multiprogramming
- b) Single-tasking
- c) Batch Processing
- d) Real-Time
Answer: a) Multiprogramming
Q8: What does ASCII stand for?
- a) American Standard Code for Information Interchange
- b) Advanced System Code for Internet Interface
- c) Automated System for Character Input
- d) Analog Standard Code for Integrated Information
Answer: a) American Standard Code for Information Interchange
Q9: Which number system is based on 16 symbols?
- a) Binary
- b) Octal
- c) Decimal
- d) Hexadecimal
Answer: d) Hexadecimal
Q10: What is the decimal equivalent of the binary number 1101?
- a) 11
- b) 13
- c) 15
- d) 14
Answer: b) 13
Q11: Which register stores the address of the next instruction?
- a) Accumulator
- b) Program Counter
- c) Instruction Register
- d) Stack Pointer
Answer: b) Program Counter
Q12: The hexadecimal value 'A' equals what in decimal?
- a) 9
- b) 10
- c) 11
- d) 12
Answer: b) 10
Q13: Which component of the OS manages file creation and access?
- a) Memory Manager
- b) File Manager
- c) Scheduler
- d) Loader
Answer: b) File Manager
Q14: Which base is used in binary number system?
- a) Base 2
- b) Base 8
- c) Base 10
- d) Base 16
Answer: a) Base 2
Q15: What does GUI stand for in operating systems?
- a) General User Interface
- b) Graphical User Interface
- c) Guided User Interaction
- d) Graphics Unified Interface
Answer: b) Graphical User Interface