1000489
Descripción
Test por Zacchaeus Snape, actualizado hace más de 1 año
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Creado por Zacchaeus Snape
hace más de 10 años
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Pregunta 1
Pregunta
What is the role of an operating system?
Respuesta
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To manage the hardware and resources
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To provide software
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To provide a nice looking interface
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To make the computer easier to use
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To provide a virtual machine
Pregunta 2
Pregunta
What is an intractable problem?
Respuesta
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An unsolvable problem
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A problem that can be solved
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A problem that cannot be solved within a reasonable amount of time
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A problem that is too big
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A problem that is too abstract
Pregunta 3
Pregunta
How might we be able to solve an intractable problem?
Respuesta
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The way we would solve any other problem
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Using a heuristic approach
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By ignoring some of the contraints and producing a non-optimal solution
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By guessing randomly
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Using an algorithm
Pregunta 4
Pregunta
What are the features of an embedded operating system?
Respuesta
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Lower hardware requirements
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High processing power
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Limited or no user interface
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Designed to run many different types of software
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Designed to operate mostly on its own from within other hardware
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Never real-time
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Manages power consumption in battery-powered devices
Pregunta 5
Pregunta
What are the features of a desktop operating system?
Respuesta
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Must be able to support a wide range of peripherals
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Able to run on a wide range of hardware
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Limited memory capacity
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Supports a wide range of software
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Must work on mobile devices
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Must manage security
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Customisable by the user
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Hard to upgrade
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Supports networking protocols
Pregunta 6
Pregunta
What is overflow?
Respuesta
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Where a number is too large to be stored in the available number of bits
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Where a number is too large
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Where a number is too small to be stored in the available number of bits
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Where a number is too small
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Where a number overflows the boundary
Pregunta 7
Pregunta
Which of these situations might cause overflow?
Respuesta
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Multiplying two numbers together
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Dividing by a small number
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Converting a number from one type to another
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Adding two numbers
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Dividing by zero
Pregunta 8
Pregunta
What does Third Normal Form mean?
Respuesta
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No repeating groups of attributes
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They don't rely on eachother
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No non-key attribute depends on another non-key attribute
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All attributes depend on a non-key attribute
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They all depend on eachother
Pregunta 9
Pregunta
Why is putting a database in Third Normal Form important?
Respuesta
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Minimise data duplication
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Eliminate update anomalies
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To save space
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To keep the database from getting too big
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Eliminate overlap
Pregunta 10
Pregunta
When is an adjacency matrix appropriate?
Respuesta
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When there are more edges than vertices
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When there are a fewer edges than vertices
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When there lots of nodes
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When there are lots of edges
Pregunta 11
Pregunta
What are the properties of a tree?
Respuesta
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Every node must be connected
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There must be no cycles
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It must be branched
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It has cycles
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Every node must be connected by more than one edge
Pregunta 12
Pregunta
No computing device can be more powerful than a Turing machine
Respuesta
- True
- False
Pregunta 13
Pregunta
If a Turing machine cannot solve a problem then it is still possible that it could be solved
Respuesta
- True
- False
Pregunta 14
Pregunta
What is the purpose of a subnet mask?
Respuesta
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identifies which other computers are on the same segment
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tells the computer where it is
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shows which computers can have packets sent directly to them
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identifies which computers are on a different segment
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shows which computers must have packets sent to them via the router
Pregunta 15
Pregunta
What measures could be put in place to increase the security of a WiFi network?
Respuesta
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Reduce the power of the transmitter
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Check the MAC addresses trying to connect and only allow computers on a certain list to connect
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Require a password to connect to the network
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Send data unencrypted
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Use a router
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Allow all MAC addresses to connect
Pregunta 16
Pregunta
What is meant by overriding when writing programs that involve inheritance?
Respuesta
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redefining methods that are defined in the parent class
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using the same name for a method used in the parent class, but assigning new attributes to it
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defining a new method
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changing attributes of a class
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using a method that is defined in the parent class
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