ICAS - ICAS Digital Systems and Programming Questions and Answers

Question 1

In a digital computing context, what is the primary reason for using the binary system (base-2) to represent data?

Accepted Answer

It directly corresponds to the two-state (on/off) nature of electronic circuits.

Answer

Binary code is easier for humans to read and write than decimal code.

Answer

Using two digits significantly reduces the amount of physical storage required for data.

Answer

The binary system allows for a greater range of numerical values to be represented.

Question 2

A developer is writing a device driver for a new piece of graphics hardware. Performance and direct control over memory are critical requirements. Which type of programming language would be most suitable for this task?

Accepted Answer

A low-level language like C or Assembly, for its minimal abstraction and direct hardware access.

Answer

A high-level language like Python, for its readability and extensive libraries.

Answer

A scripting language like JavaScript, for its cross-platform compatibility.

Answer

A database query language like SQL, for its data management capabilities.

Question 3

A network administrator is analyzing data packets and notices that a simple error-checking mechanism is being used. An extra bit is added to each byte of data to ensure that the total number of '1's is always even. Which of the following error detection techniques is being used?

Accepted Answer

Parity Check

Answer

Checksum

Answer

Cyclic Redundancy Check (CRC)

Answer

Forward Error Correction (FEC)

Question 4

A digital circuit contains a logic gate that produces a high output (1) only when both of its two inputs are high (1). What type of logic gate is this?

Accepted Answer

AND gate

Answer

OR gate

Answer

NOT gate

Answer

XOR gate

Question 5

A programmer creates a simple loop intended to display numbers. The pseudocode is as follows:

SET a TO 1
WHILE a < 5
  DISPLAY a
  SET a TO a + 1
END WHILE

What is the final number displayed by this algorithm?

Accepted Answer

4

Answer

1

Answer

5

Answer

6

Question 6

Which of the following is a key characteristic of high-level programming languages compared to low-level languages?

Accepted Answer

They offer greater abstraction from the hardware, making them easier to read and write.

Answer

They are machine-dependent and tied to a specific computer architecture.

Answer

They require the programmer to manage memory allocation manually.

Answer

They are translated into machine code using an assembler.