2.1.4 Decision points, logical conditions and program flow Quiz: OCR Computer Science, Unit 6

The 20 questions

1. Which type of operator is used to evaluate conditions in decision-making statements?

   • Assignment operator
   • Relational variable
   • Arithmetic operator
   • Boolean operator

2. Which issue occurs when two processes wait endlessly for resources held by each other?

   • Race condition
   • Starvation
   • Deadlock
   • Livelock

3. What is the logical outcome of TRUE AND (FALSE OR NOT FALSE)?

   • FALSE
   • UNDEFINED
   • NULL
   • TRUE

4. Which parameter passing method passes a copy of the actual value to a procedure?

   • Pass by address
   • Pass by pointer
   • Pass by reference
   • Pass by value

5. What happens to the original variable when modified inside a subroutine using pass by reference?

   • Error raised
   • Variable deleted
   • No change occurs
   • Value changes

6. What essential component prevents a recursive subroutine from calling itself indefinitely?

   • Stack frame
   • Return address
   • General case
   • Base case

7. What data structure is used by the system memory stack during recursive calls?

   • Call stack
   • Binary tree
   • Linked list
   • Priority queue

8. What is the process of breaking down a complex problem into smaller sub-problems?

   • Visualisation
   • Abstraction
   • Generalisation
   • Decomposition

9. Which computational method recursively breaks a problem into identical smaller sub-problems until easily solvable?

   • Data mining
   • Dynamic programming
   • Backtracking
   • Divide and conquer

10. What computational technique removes unnecessary details to focus on essential features?

    • Backtracking
    • Pipelining
    • Abstraction
    • Modularity

11. Which problem-solving technique tries partial solutions and abandons them upon reaching an invalid state?

    • Data mining
    • Backtracking
    • Heuristics
    • Performance modelling

12. What approach uses empirical rules of thumb to find an adequate solution quickly?

    • Heuristics
    • Backtracking
    • Visualisation
    • Brute force

13. What technique allows multi-stage processing by feeding the output of one process into the next?

    • Pipelining
    • Modularity
    • Recursion
    • Encapsulation

14. Which task can be executed concurrently during a video rendering process?

    • Sequential file writing
    • System shutdown
    • Initialization setup
    • Independent frame processing

15. Which concept allows multiple tasks to make progress at the exact same time?

    • Abstraction
    • Sequence
    • Concurrency
    • Iteration

16. What type of variable is accessible only within the subroutine where it was declared?

    • Global variable
    • Universal variable
    • Public variable
    • Local variable

17. Which computational technique transforms complex data into graphical representations to aid human analysis?

    • Backtracking
    • Data mining
    • Pipelining
    • Visualisation

18. Which feature of programming languages allows subroutines to be defined and reused across programs?

    • Modularity
    • Iteration
    • Pipelining
    • Concurrency

19. What issue occurs when multiple concurrent threads attempt to modify shared data simultaneously without synchronization?

    • Deadlock
    • Livelock
    • Race condition
    • Starvation

20. Which computational method analyses massive datasets to discover hidden patterns and relationships?

    • Pipelining
    • Visualisation
    • Performance modelling
    • Data mining

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