A level Computing Quiz

Zacchaeus Snape
Quiz by , created about 5 years ago

A Levels Computing Quiz on A level Computing Quiz, created by Zacchaeus Snape on 06/12/2014.

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Zacchaeus Snape
Created by Zacchaeus Snape about 5 years ago
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Question 1

Question
What is the role of an operating system?
Answer
  • To manage the hardware and resources
  • To provide software
  • To provide a nice looking interface
  • To make the computer easier to use
  • To provide a virtual machine

Question 2

Question
What is an intractable problem?
Answer
  • An unsolvable problem
  • A problem that can be solved
  • A problem that cannot be solved within a reasonable amount of time
  • A problem that is too big
  • A problem that is too abstract

Question 3

Question
How might we be able to solve an intractable problem?
Answer
  • The way we would solve any other problem
  • Using a heuristic approach
  • By ignoring some of the contraints and producing a non-optimal solution
  • By guessing randomly
  • Using an algorithm

Question 4

Question
What are the features of an embedded operating system?
Answer
  • Lower hardware requirements
  • High processing power
  • Limited or no user interface
  • Designed to run many different types of software
  • Designed to operate mostly on its own from within other hardware
  • Never real-time
  • Manages power consumption in battery-powered devices

Question 5

Question
What are the features of a desktop operating system?
Answer
  • Must be able to support a wide range of peripherals
  • Able to run on a wide range of hardware
  • Limited memory capacity
  • Supports a wide range of software
  • Must work on mobile devices
  • Must manage security
  • Customisable by the user
  • Hard to upgrade
  • Supports networking protocols

Question 6

Question
What is overflow?
Answer
  • Where a number is too large to be stored in the available number of bits
  • Where a number is too large
  • Where a number is too small to be stored in the available number of bits
  • Where a number is too small
  • Where a number overflows the boundary

Question 7

Question
Which of these situations might cause overflow?
Answer
  • Multiplying two numbers together
  • Dividing by a small number
  • Converting a number from one type to another
  • Adding two numbers
  • Dividing by zero

Question 8

Question
What does Third Normal Form mean?
Answer
  • No repeating groups of attributes
  • They don't rely on eachother
  • No non-key attribute depends on another non-key attribute
  • All attributes depend on a non-key attribute
  • They all depend on eachother

Question 9

Question
Why is putting a database in Third Normal Form important?
Answer
  • Minimise data duplication
  • Eliminate update anomalies
  • To save space
  • To keep the database from getting too big
  • Eliminate overlap

Question 10

Question
When is an adjacency matrix appropriate?
Answer
  • When there are more edges than vertices
  • When there are a fewer edges than vertices
  • When there lots of nodes
  • When there are lots of edges

Question 11

Question
What are the properties of a tree?
Answer
  • Every node must be connected
  • There must be no cycles
  • It must be branched
  • It has cycles
  • Every node must be connected by more than one edge

Question 12

Question
No computing device can be more powerful than a Turing machine
Answer
  • True
  • False

Question 13

Question
If a Turing machine cannot solve a problem then it is still possible that it could be solved
Answer
  • True
  • False

Question 14

Question
What is the purpose of a subnet mask?
Answer
  • identifies which other computers are on the same segment
  • tells the computer where it is
  • shows which computers can have packets sent directly to them
  • identifies which computers are on a different segment
  • shows which computers must have packets sent to them via the router

Question 15

Question
What measures could be put in place to increase the security of a WiFi network?
Answer
  • Reduce the power of the transmitter
  • Check the MAC addresses trying to connect and only allow computers on a certain list to connect
  • Require a password to connect to the network
  • Send data unencrypted
  • Use a router
  • Allow all MAC addresses to connect

Question 16

Question
What is meant by overriding when writing programs that involve inheritance?
Answer
  • redefining methods that are defined in the parent class
  • using the same name for a method used in the parent class, but assigning new attributes to it
  • defining a new method
  • changing attributes of a class
  • using a method that is defined in the parent class