1 In a system, the boundary is important because it: A shows what is inside and outside the system B replaces all components C removes the need for inputs D stops the system from working
2 The von Neumann architecture is based on the concept of: A Stored program B Parallel processing C Distributed computing D Quantum computing
3 What does the sign bit indicate in floating-point representation? A Whether the number is positive or negative B The exponent value C The number of bits D The precision of the number
5 What is one disadvantage of von Neumann architecture? A High cost B Limited speed due to shared memory C Too many input devices D No output devices
6 The von Neumann architecture is characterized by: A Separate memory for data and instructions B A single memory for both data and instructions C No memory unit D Multiple processors
7 What is the first step in converting a decimal number to binary? A Multiply the number by 2 B Divide the number by 2 and record the remainder C Add 2 to the number D Subtract 2 from the number
8 In computing systems, how are negative integers commonly represented? A Sign-magnitude B One's complement C Two's complement D Excess-3 code
9 Which type of system includes human-made systems like computers and social organizations? A Natural systems B Artificial systems C Biological systems D Physical systems
10 Which statement about ASCII is correct? A ASCII can represent all Unicode characters B ASCII uses 8 bits for each character C ASCII is a 7-bit encoding scheme D ASCII is used only for images
12 Natural systems are those that: A Are made by humans B Exist in nature without human intervention C Are purely artificial D Are designed by engineers
13 Which of the following best describes the Internet as a system? A A single computer with its own hardware and software. B A network of interconnected computers that share information using common protocols. C A software application for browsing web pages. D A type of natural system found in the environment.
14 Which of the following is NOT a component of the von Neumann architecture? A Memory B Control Unit C Arithmetic Logic Unit D Printer
15 Which of the following is an advantage of the von Neumann architecture? A Simple design B High speed due to separate memory C No need for a control unit D Unlimited memory
16 In double precision floating-point representation, how many bits are used for the mantissa (significand)? A 23 B 32 C 52 D 64
18 Which of the following is NOT an advantage of Unicode over ASCII? A Supports more characters B Supports multiple languages C Uses only 7 bits per character D Includes symbols and emojis
19 Which of the following is a type of computing system? A Personal computer B Natural system C Biological system D Chemical system
20 In two's complement, how is a negative number represented? A By inverting all bits of the positive number B By adding 1 to the positive number C By inverting all bits and adding 1 D By setting the sign bit to 0
21 The Internet is best described as a: A Single computer system B Network of networks C Chemical system D Natural system
22 Which of the following is a major disadvantage of the von Neumann architecture? A It cannot store programs B It uses separate memories for data and instructions C It has a bottleneck because it uses a single bus for data and instructions D It does not need a control unit
23 What does the term 'Internet' refer to? A A single computer network B A global system of interconnected computer networks C A type of software D A programming language
24 Which of the following is a natural science? A Computer Science B Physics C Engineering D Design Science
25 Everything outside a system that can affect it is called the: A input B output C environment D process