CSI106-4

Choose 1 answer: ______ separated the programming task from computer operation tasks.

• Algorithms

• Data processors

• High-level programming languages

• Operating systems

Answer explanation

Operating systems manage hardware and software resources, allowing programming tasks to be executed independently from the underlying computer operations. This separation is crucial for efficient task management.

Choose 1 answer: THE(A) 17th-century computing machine that could perform addition and subtraction was the ______.

• Pascaline

• Jacquard loom

• Analytical Engine

• Babbage machine

Answer explanation

The Pascaline, invented by Blaise Pascal in the 17th century, was the first mechanical calculator capable of performing addition and subtraction, making it the correct answer.

Choose 1 answer: After the instruction is decoded, the control unit sends the task order to a component in the CPU. What is this phase?

• Fetch phase

• Decode phase

• Execute phase

• None of the others

Answer explanation

The phase where the control unit sends the task order to execute the decoded instruction is the Execute phase. This is when the actual operation is performed based on the decoded instruction.

Choose 1 answer: RAM is used as a short memory because it is ______.

• Volatile

• Has small capacity

• Is very expensive

• Is programmable

• None of the others

Answer explanation

RAM is considered short-term memory because it is volatile, meaning it loses its data when power is turned off. This characteristic makes it suitable for temporary storage during active processes.

Choose 1 answer: For surface organization of magnetic tape, the width of the tape is divided into nine tracks. Nine vertical locations can store 8 bits of information related to a byte plus a bit for ______.

• Next block

• Data

• Next tape information

• Error detection

Answer explanation

The correct answer is 'Error detection' because the additional bit is used for error checking, ensuring data integrity during storage and retrieval on magnetic tape.

Choose 1 answer: IBM-PC is an example of ______.

• A mainframe

• Machine-in-built

• Microcomputer

• Special purpose

• None of the others

Answer explanation

The IBM-PC is classified as a microcomputer because it is designed for individual use, featuring a microprocessor as its central processing unit, unlike mainframes which serve multiple users.

Choose 1 answer: Instructions and memory addresses are represented by ______.

• Character codes

• Binary codes

• Binary word

• Parity bit

• None of the others

Answer explanation

Instructions and memory addresses are represented by binary codes, as they are processed by computers in binary form (0s and 1s). This makes 'Binary codes' the correct choice.

Choose 1 answer: Computers are extremely fast and have fantastic memories. However, the only thing they can remember is ______.

• Instruction

• Series of 1s and 0s

• Boolean algebra

• Logic theorems

• None of the others

Answer explanation

Computers store and process information in binary form, which consists of a series of 1s and 0s. This is the fundamental way they remember data, making 'Series of 1s and 0s' the correct answer.

Choose 1 answer: Which of the following is equivalent to 12 in decimal?

• (1110)2

• (C)16

• (15)8

• None of the others

Answer explanation

The decimal number 12 is equivalent to (C)16 in hexadecimal. In base 16, 'C' represents the value 12, confirming that (C)16 is the correct answer.

Choose 1 answer: A group containing ______ bits in the binary system are represented as one digit in the octal system.

• 1

• 2

• 3

• 4

• None of the others

Answer explanation

In the binary system, 3 bits can represent values from 0 to 7, which corresponds to a single digit in the octal system. Therefore, a group containing 3 bits in binary is represented as one digit in octal.