Nat 5 Computer Systems

Front

Convert the decimal number 105 into 8-bit binary.

Back

01101001

Front

What is the largest number that can be represented using 8-bit binary?

Back

255 (11111111 in binary)

Front

Identify the mantissa and exponent in the floating-point number 0.18563 × 10⁴.

Back

Mantissa = 0.18563, Exponent = 4

Front

How many characters can be stored using 80 bits in extended ASCII?

Back

10 characters (each ASCII character uses 8 bits).

Front

What is the function of the Arithmetic Logic Unit (ALU)?

Back

It performs arithmetic calculations and logic operations (e.g., AND, OR, NOT).

Front

What part of the processor stores temporary data during execution?

Back

Registers

Front

What does the data bus do?

Back

It transfers data between the CPU and memory.

Front

What does the address bus do?

Back

It transfers memory addresses from the CPU to memory.

Front

What is the purpose of a firewall?

Back

It monitors and controls incoming and outgoing network traffic to prevent unauthorised access.

Front

How does encryption protect data?

Back

It converts data into an unreadable format so that only the intended recipient can decode it.