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Y10: OCR: Exam Preparation - Unit 1

Quiz by Teran Subasinghe

GCSE (OCR)
Computer Science (9-1), J277
English National Curriculum

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50 questions
Show answers
  • Q1
    What is the primary purpose of virtual memory in a computer system?
    To improve the resolution of the display
    To extend the available physical memory by using a portion of the hard drive
    To permanently store data
    To increase the processing speed of the CPU
    30s
    1.2.1e
  • Q2
    Which component typically uses virtual memory to manage running applications when RAM is full?
    The graphics card
    The operating system
    The CPU
    The power supply
    30s
    1.2.1e
  • Q3
    What is a common side effect of heavy reliance on virtual memory?
    Slower system performance due to increased disk I/O
    Faster internet speed
    Higher display resolution
    Increased battery life
    30s
    1.2.1e
  • Q4
    Which type of memory is used in virtual memory systems to temporarily store pages swapped out from the RAM?
    The ROM
    The CPU cache
    The graphics memory (VRAM)
    The hard disk or SSD
    30s
    1.2.1e
  • Q5
    When a computer uses virtual memory, what is the term for the area of the hard drive designated for this purpose?
    Paging file
    Cache memory
    Boot sector
    File system
    30s
    1.2.1e
  • Q6
    What happens when a computer experiences thrashing in the context of virtual memory?
    The system heavily swaps pages in and out, reducing performance
    Memory is automatically doubled
    The CPU speed increases
    The display resolution decreases
    30s
    1.2.1e
  • Q7
    In virtual memory systems, what is a 'page'?
    A fixed-length block of data stored in RAM or disk
    A complex software application
    An entire file on the hard drive
    A section of a web browser
    30s
    1.2.1e
  • Q8
    What is the purpose of the 'page table' in a virtual memory system?
    To schedule CPU tasks
    To store user data permanently
    To manage network connections
    To map virtual addresses to physical addresses
    30s
    1.2.1e
  • Q9
    Which of the following best describes the role of a 'swap file' in virtual memory management?
    A file that contains startup configuration for the OS
    A document stored in temporary memory
    A reserved space on the hard drive used to extend the RAM
    A backup file for system recovery
    30s
    1.2.1e
  • Q10
    What does 'page fault' mean in the context of virtual memory?
    A failure of the CPU
    An event that occurs when a program tries to access data not currently in RAM
    A security breach in the network
    A fault in the system's hardware
    30s
    1.2.1e
  • Q11
    Which type of encryption uses the same key for both encryption and decryption?
    Quantum encryption
    Hashing
    Symmetric encryption
    Asymmetric encryption
    30s
    1.3.2b
  • Q12
    What is the primary purpose of encryption in data transmission?
    To ensure data confidentiality
    To speed up data transmission
    To compress data
    To increase data size
    30s
    1.3.2b
  • Q13
    In asymmetric encryption, what are the two types of keys used?
    Static key and dynamic key
    Primary key and secondary key
    Master key and slave key
    Public key and private key
    30s
    1.3.2b
  • Q14
    What is the main difference between hashing and encryption?
    Hashing is a one-way function, while encryption is a two-way function
    Hashing is used only for text data, while encryption is used for all types of data
    Hashing requires less computational power than encryption
    Hashing uses a symmetric key, while encryption uses an asymmetric key
    30s
    1.3.2b
  • Q15
    What is the main advantage of asymmetric encryption over symmetric encryption?
    It does not require keys at all
    It provides enhanced security by using two separate keys
    It uses the same key for encryption and decryption
    It is faster than symmetric encryption
    30s
    1.3.2b

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