ICAS Programming and Digital Systems Questions and Answers

Question 1

In a computer program, a special container is used to store a value that can be changed later.
For example, it could hold a player's score, which starts at 0 and increases.
What is this container called?

Accepted Answer

A variable

Answer

A function

Answer

A constant

Answer

An operator

Question 2

Computers process and store all information using a base-2 number system. What is the name of this system and which two digits does it use?

Accepted Answer

Binary, using 0 and 1

Answer

Decimal, using 0-9

Answer

Hexadecimal, using 0-F

Answer

Octal, using 0-7

Question 3

Consider the following sequence of instructions:
1. SET a TO 5
2. SET b TO 10
3. SET a TO a + b
4. SET b TO a - b

After all instructions are executed, what is the final value of 'b'?

Accepted Answer

5

Answer

15

Answer

10

Answer

0

Question 4

A programmer wants to write a set of instructions that repeats a specific action exactly 50 times. Which of the following programming structures is the most appropriate for this task?

Accepted Answer

A FOR loop

Answer

An IF-ELSE statement

Answer

A variable declaration

Answer

A comment

Question 5

In digital electronics, a specific logic gate will only output a 1 (TRUE) if BOTH of its inputs are 1 (TRUE). If either input is 0 (FALSE), the output is 0 (FALSE). Which gate is this?

Accepted Answer

AND gate

Answer

OR gate

Answer

NOT gate

Answer

XOR gate

Question 6

A user is asked to enter their age into a program. The program then follows this logic:

IF age < 18 THEN
  DISPLAY "Child ticket"
ELSE
  DISPLAY "Adult ticket"
END IF

If the user enters the age 18, what will the program display?

Accepted Answer

Adult ticket

Answer

Child ticket

Answer

Both "Child ticket" and "Adult ticket"

Answer

The program will show an error

In a computer program, a special container is used to store a value that can be changed later.For example, it could hold a player's score, which starts at 0 and increases.What is this container called?

In a computer program, a special container is used to store a value that can be changed later.
For example, it could hold a player's score, which starts at 0 and increases.
What is this container called?