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WorksheetsAQA A-Level Grand Quiz
Total questions: 80
Worksheet time: 44mins
Calculate the decimal equivalent of the normalised floating point representation number with an 8-bit mantissa and a 4-bit exponent, both stored using two’s complement.
1.0110010 0010
(a)
With an 8 bit mantissa and a 4 bit exponent, write the normalised floating point representation of the decimal value 0.15625
(a)
The highest frequency component in a sound that is being sampled is 14,500 Hz. What should the minimum sample rate be?
(a)
Given an 8-bit mantissa and 4-bit exponent, write the normalised, two's complement representation of 58.5 in binary.
(a)
Using odd parity, what is the parity bit for the following data? 0101011
(a)
A band is recording and digitising a song to make available as a download from their website.
The song lasts 3 minutes. The sample resolution is 16 bits and a sample rate of 44 kHz has been used. Calculate the minimum amount of storage space, in megabytes (MB), for the song and leave your answer with a precision of two decimal places.
(a)
Horatio is on Discord voice with his mates but his computer gives him a warning message that his microphone's ADC has failed. What is an ADC?
(a)
What is the denary equivalent of the hexadecimal number D6?
(a)
Represent the decimal value -67 as an 8-bit two’s complement binary integer.
(a)
Calculate the minimum size of file that could be used to store the bitmap image in the figure above. Express your answer in bytes.
(a)
Calculate the decimal equivalent of the number.
(a)
Compress the above using Run-Length-Encoding.
(a)
Which theorem states that we need to be sampling at a frequency at least twice the rate of the highest frequency that can be present in the original signal?
(a)
Translate &DD00 into denary
(a)
What is abstraction?
Removal of certain details, keeping relevant the information
Stores data in a program for retrieval
Freedom from representing art
Detects errors while program is running
Selection is when...
...a program will execute instructions regardless of what the user does
...a program will execute certain instructions based on the user's actions
...a program will execute certain instructions based on conditions
....a program will execute all instructions regardless of what the user does
In computer programming 'iteration' is used to...
... loop around and around a piece of code until the correct answer is chosen
...loop around a piece of code until a condition is met that activates the next part of the program
...loop around and around a piece of code until a condition is met that ends the iteration
...loop twice around a piece of code until a condition is met that ends the iteration
A kibibyte has (a) bytes.
What subcategory of software does a virus checker belong to.
Operating System
Translators
Utilities
Defragmentation
Which of the following is not a resource managed by an operating system?
Processor
Memory
I/O Devices
Allocating Files on Secondary Storage
Provides Virtual Machine
Which layer of the TCP/IP stack determines which application layer software on the server should deal with a received request by using port numbers?
Application
Transport
Network
DataLink
In the case of dictionary compression, a dictionary ...
acts as a reference for a particular subject.
maps sequences of characters onto values.
is an electronic resource that lists words and gives their meaning.
is a set of words or other text strings made for use in applications such as spellcheckers or brute-force attacks.
In a DBMS, when a user starts to edit a record, others are prevented from accessing the record for the duration of the editing. What is this called?
(a)
Which form of transmission results in the clocks for the receiver and transmitter synchronising for the duration of a transmission?
(a)
A particular computer system uses a 32-bit address bus and a 32-bit data bus. What is the maximum amount of memory, in bytes, that could be accessed?
(a)
Given the machine in the exampled image, how many commands can it store and work with?
(a)
Fill the blanks in the following explanation of the above assembly code.
Check if the value stored in memory location ___ is ___ times the value stored in memory location ___
(a)
Which of the boolean equations above are incorrect? Select more than one.
Equation 1
Equation 2
Equation 3
Equation 4
Equation 5
What is the name of the logic gate above?
(a)
Which type of computer architecture is typically used for digital signal processing?
(a)
SSID Stands for?
(a)
Some compilers produce this instead of an exe. This allows it to be platform independent.
(a)
The number of signal changes (which may occur) in a given period of time/in a second is known as...
(a)
The range of frequencies that can be transmitted across a network connection is known as...
(a)
RTS / CTS Are protocols which stand for?
(a)
In direct addressing mode, how many memory locations could a processor that used the instruction format shown above could potentially make use of?
(a)
(a) communication is most notably evidenced with buses, where multiple bits are sent simultaneously.
Peripheral devices usually make use of __________ communication.
Serial
Parallel
What would be the primary key for the RaceEntryAndResult table?
(a)
Which of these represents a natural number?
A
B
C
D
None
Which logic gate is represented by this truth table?
(a)
Complete the truth tables for the OR and NAND gates. Put them in order from top to bottom. Separate your two answers with a space.
(a)
Complete the statement.
(a)
The processor in Ella’s computer has four cores running at 2.8 GHz and the processor in Josephine’s computer has one core running at 3.2 GHz.
Which computer would be faster at serial processing?
Ella's
Josephine's
Using abbreviations only, state one of the registers used in the fetch part of the F-E cycle.
(a)
An attribute in one table which is a primary key attribute in another table is a (a) key
(a) addressing means the operand is the datum.
Another word for the mnemonic such as LDR, STR etc.
(a)
What is a register?
Memory location that is internal to the processor
Single bit memory circuit
Set of parallel wires inside a processor
Single unit of memory inside the Main Memory (RAM)
To connect a computer to a wired network - you need a 'NIC'. NIC stands for
Network Integration Circuit
Network Integration Card
Node Integration Card
Network Interface Card
At the ends of each bus network, to prevent signals reflecting back down the bus - what device is used?
A terminator
An exterminator
A repeater
An Ethernet jack
Every device connecting to a network has a unique MAC address. MAC stands for
Motherboard Access Circuit
Main Area Code
Machine Area Circuit
Media Access Control
What does the word "topology" mean?
The type of devices on the network
The way connections on a network are configured
The method of sending data on a network
The study of networks
What type of programming language am I describing here?
"A language based on giving the computer commands or procedures to follow."
Declarative
Object-Oriented
Functional
Imperative
What is meant by latency in the performance of a network?
The amount of time data takes to travel from the source to the destination
The maximum rate that data can be transferred at
The number of errors that are found in a data packet after transmission
The route a packet takes when it is being transmitted
What are the two types of RFID Tags?
Active and Passive
Aggressive and Passive
Wireless and Wired
Male and Female
This is an image of which type of drive?
Hard Disk Drive
Optical Drive
Solid State Drive
CD Drive
Which of these is not related to securing a wireless network?
WPA/WPA2
SSID broadcast
MAC whitelists
RTS/CTS
What is bandwidth measured in?
mm / cm / km
Nm
Hz
kg
Magnetic disks are organised into.....
circles and wedges
sectors and tracks
chunks and spirals
disks and docks
arcs and slices
This type of memory is usually located on the CPU. It is a fast access type of memory that is very expensive. Due to its cost, only small amounts of this memory are present in most computer systems. This type of memory improves the performance of the CPU as it is able to provide instructions and data to the CPU at a much faster rate than other system memory such as RAM. The more of this type of memory your system has, the better its performance is likely to be.
Cache memory
CPU memory
Bus memory
Secondary Storage
The three steps to processing instructions given by a currently running program
Fetch, decode, execute
Fetch, perform, operate
Collect, decode, operate
Collect, analyse, execute
What happens in FETCH immediately after the CPU reads the contents of the Program Counter to find the address of the next instruction to be fetched
The Program Counter is copied to the CIR
The Program Counter is incremented
The contents of the data bus is read
The contents of the MDR is read
In the EXECUTE stage the result of a calculation is stored in the ..
ALU
MDR
Control Bus
Accumulator
Operand
19.Which of the following represents characteristics of an entity?
Records
Attributes
Rows of a table
None of the above
What does URL stand for?
Uniform Resource Locator
Unique Repository Link
Underflow Recognition Liability
Universal Resource Locator
A server that contains domain names and associated IP addresses
Domain name scheduler
Domain name software
Domain name selection
Domain name server
When an IP address is combined with a port number it creates ...
a plug
an IPPN
a gateway
a socket
Subnet mask used to identify that the first 3 octets of an IP address are for the network
255.255.255.0
255.0.0.0
0.0.0.255
0.255.255.255
Which architecture is best suited to storing a program in read only memory (ROM)
Harvard
Von Neumann
Both
The python operator for exponentiation is
^
*
&
**
random.randint(a,b) returns
a random integer x, a < x < b
a random integer x, a <= x < b
a random integer x, a <= x <= b
a random integer x, a < x <= b
