#7 Intro to programming/types of prog language

1. Which of these does not apply to the 'Sequence' programming construct?

• A. All instructions are executed
• B. Instructions are executed in their given order
• C. Program execution starts at the beginning and finishes at the end of the list of instructions
• D. Certain blocks of code may be bypassed

2. Which of the following is used to repeatedly execute a block of code?

• A. Sequence
• B. Iteration
• C. Selection
• D. Subroutine

3. A switch/case statement is an example of:

• A. Iteration
• B. Sequence
• C. Subroutine
• D. Selection

4. What is a variable?

• A. A part of a program that can be changed
• B. A named location in the computer's memory that stores a value permanently, not allowing it to be changed during execution
• C. A named location in the computer's memory that stores a value and that value can change during execution
• D. A built-in value in a computer program that can be used when needed

5. What is the main difference between a constant and a variable?

• A. The value stored in a constant cannot be changed during program execution
• B. The value stored in a variable cannot be changed during program execution
• C. Only variables can be created by the programmer
• D. Only constants can be created by the programmer

6. Do the precedence rules apply when constructing arithmetic expressions in programming?

• A. Yes
• B. No, there are different rules in programming
• C. No, there are no agreed precedence rules in programming
• D. No, they are not necessary when programming

7. Why will the following expression fail to calculate the mean of the integer values A, B and C? A+B+C/3

• A. The wrong division symbol is being used
• B. The precedence rules are not being applied correctly
• C. The numbers should be multiplied, not added
• D. There are too many numbers

8. What is the role of the assignment operator?

• A. It terminates a single statement
• B. It updates or initialises a variable
• C. It checks whether two values are equal
• D. It introduces a new line of code

9. When performing iteration using REPEAT {...} UNTIL (...), how should the structure be understood?

• A. Execute the body of the loop at least once and then keep iterating until the expression given after 'UNTIL' becomes false
• B. Execute the body of the loop at least once and then keep iterating until the expression given after 'UNTIL' becomes true
• C. Iterate until the expression given after 'UNTIL' becomes false, but this might mean that the body of the loop never gets executed
• D. Iterate until the expression given after 'UNTIL' becomes true, but this might mean that the body of the loop never gets executed

10. An integer variable called x is initialised to 100. If a WHILE loop is controlled by the Boolean expression x>0, which of the following is irrelevant in the design of the loop?

• A. It must be the case that x eventually drops to 0 or below
• B. Whether x was declared and initialised before the loop as opposed to within it
• C. Whether the value of x gets modified somehow within the body of the loop
• D. Whether there are other variables being updated within the loop