Module 1 Ppt 3

Question 1

What are the main categories of instructions in the IAS computer?

Answer 1

• Data transfer
• Unconditional branch
• Conditional branch
• Arithmetic
• Address modify

These categories help in understanding the functional capabilities of the IAS computer.

Question 2

Define data transfer in the context of the IAS computer.

Answer 2

Move data between memory and ALU registers or between two ALU registers.

This operation is fundamental for data manipulation within the computer.

Question 3

What is the role of an unconditional branch instruction?

Answer 3

Facilitates changing the normal sequential execution of instructions.

This is useful for implementing loops and repeated operations.

Question 4

What does a conditional branch instruction allow?

Answer 4

Makes branching dependent on a condition, allowing decision points.

This enhances the control flow of programs.

Question 5

What operations are performed by the ALU in the IAS computer?

Answer 5

Arithmetic operations.

The ALU is crucial for executing mathematical computations.

Question 6

What does address modify instruction permit?

Answer 6

Computes addresses in the ALU and inserts them into instructions stored in memory.

This provides flexibility in addressing within programs.

Question 7

What is the Von Neumann bottleneck?

Answer 7

The limitation where instructions can only be executed one at a time and sequentially.

This bottleneck restricts CPU performance despite enhancements.

Question 8

What is a key characteristic of the Harvard architecture?

Answer 8

Has two separate memory spaces for program code and data.

This separation allows for parallel fetching and execution.

Question 9

How many storage locations does the IAS memory consist of?

Answer 9

4,096 storage locations, called words.

Each word consists of 40 binary digits (bits).

Question 10

How is a number represented in the IAS computer’s memory?

Answer 10

By a sign bit and a 39-bit value.

This format allows for both positive and negative values.

Question 11

What are the two types of computers mentioned?

Answer 11

• Fixed Program Computers
• Stored Program Computers

These types differentiate between programmable and non-programmable systems.

Question 12

What is the stored-program concept?

Answer 12

A fundamental design approach where programs are stored in memory.

This concept is attributed to John von Neumann.

Question 13

What does the Von Neumann architecture utilize?

Answer 13

A single memory unit for both data and instructions.

This architecture forms the basis of most modern computers.

Question 14

What is the operation cycle of the Von Neumann processor?

Answer 14

Fetching and execution cycles in a serial manner.

This sequential operation is a characteristic feature of the architecture.

Question 15

What does the IAS computer’s instruction cycle consist of?

Answer 15

Two subcycles.

This structure allows for efficient processing of instructions.

Question 16

List the features of Harvard architecture.

Answer 16

• Separate data path and instruction path
• Simultaneous fetching of data and instructions
• Different sized cells in both memories
• Greater memory bandwidth
• Less chance of corruption

These features enhance performance and reliability.

Question 17

True or False: The Harvard architecture uses a single bus for memory access.

Answer 17

False

Harvard architecture utilizes separate buses for instructions and data.

Question 18

What is the maximum addressable memory location in the IAS computer?

Answer 18

Numbered from 0 to 999.

This range indicates the total number of addressable words in memory.

Question 19

Fill in the blank: The IAS computer is known as the _______ generation computer.

Answer 19

first

This highlights its historical significance in computer development.