increase the voltage to make the computer work faster;
enable the computer to work at a safe 240 volts ac;
reduce the voltage from 240 V dc to about 12 V ac;
to provide a very stable low voltage.
Which one of the following is NOT found on a motherboard?
RAM;
CPU;
HDD;
BIOS.
Which one of the following is a problem with RAM?
It is faster than HDD;
It is volatile;
It stores less than the HDD;
It can easily be increased.
A fan is often found on a CPU. It is there to:
keep the CPU cool when it is working;
to keep the BIOS cool;
to cool the electrons in the CPU down;
to indicate to the user that the CPU is working correctly.
Which one of these statements is true for a graphics card?
It converts analogue signals to digital signals for the monitor;
It can only handle signals from special graphics programs. It cannot handle photographs;
It changes digital signals to analogue for the monitor;
Its capability can be increased by adding RAM.
Which one of these following devices is NOT an auxiliary storage device?
CD writer;
USB flash drive;
BIOS
Floppy disk drive.
A computer program is described as having 8 bit colour. How many colours can it display
8;
64;
128;
256.
The layout of a computer is often called its…
map;
circuit diagram;
architecture;
mitre
What is meant by a bus on a computer?
Connections that carry data between components;
Heavy wires that connect the motherboard to the power supply;
A socket that is used to mount the CPU.
A special kind of charge carrier that can carry several hundred bits of data between the components on the motherboard at any one time.
An example of handshaking is…
the process used by computer professionals to bond;
when a computer passes a message to a printer to check it’s ready;
when feedback vibration is passed into a joystick in a flight simulator;
RSI after using a keyboard too long.
It is not a good idea to open up a hard disk drive. This is because:
dust could get in and cause a head crash;
data could escape;
the hard disk runs in a vacuum and would run slower if there is air;
air molecules could react with the data to corrupt it.
Which one of the following is NOT true of a floppy disk?
data can be protected by moving a plastic tab;
it is not a reliable medium as data can often be corrupted;
it has to be protected from heat and magnetic fields;
it can hold 5 megabytes of data.
Which one of the following sets of arithmetical calculations can a CPU do?
add, subtract, multiply, divide;
add and multiply only;
add only;
add and subtract only.
The data type of a telephone number would be entered as:
an integer (whole number);
a long integer (for very large whole numbers);
a real number (a number that can be a whole number or a fraction);
a set of alphanumeric characters (letters or numbers).
The binary number 00110110 is the decimal number
12.
54.
112.
110110.
A computer crash is MOST likely to be a result of when:
two programs attempt to access the same bit of memory causing a conflict;
the hard drive fails.
dirty electricity is used.
hexadecimal numbers are used by the CPU.
Sounds are processed in a computer by:
Manipulating analogue codes;
Manipulating binary codes, each of which represents a particular sound level of the sound wave;
Manipulating hexadecimal codes, each of which represents a particular sound level of the sound wave;
Vibrating electrons in special buffers.
The decimal number 30 is written in hexadecimal as:
30
20
1E
A2
What is meant by the term embedded computer?
A computer that is obsolete;
A computer that is mounted into a desk to prevent theft;
A computer dedicated to operating a particular device;
A computer built to military specification to withstand battlefield conditions.
During an ICT lesson a student complains loudly that "This computer is being gay". The teacher goes over to help him. The MOST likely reason for the student's difficulty is:
The student has misunderstood a sequence of instructions needed to perform a particular function.
The computer has crashed.
The computer has taken a dislike to the student and is refusing to cooperate with him.
The computer has developed a very powerful emotional and physical attraction to another computer on the network. The CPU is "off-task" sending electronic messages of an intimate nature to the CPU of its friend.