J277.Paper1.OCR.Quizzes

J277.Paper1.OCR.Quizzes

by Mr. Currie

Multiple Choice

How many bits are used in ASCII?

• 16

• 4

• 7

• 8

Multiple Choice

How many Bytes are used in Unicode?

• 16

• 2

• 7

• 8

Multiple Choice

The ASCII code is represented by using 16 bits.

• True

• False

Multiple Choice

The ASCII is capable of representing non-European languages.

• True

• False

Multiple Choice

Upper and lower case letters have a different ASCII code?

• True

• False

Multiple Choice

What is the maximum number of values that can be represented in 8-bits?

• 16

• 256

• 65536

• 128

Multiple Choice

What is the maximum number of values that can be represented in 7-bits?

• 16

• 256

• 65536

• 128

Multiple Choice

A character set is...

• What language can be used in a computer system

• The fonts that a computer has installed.

• The possible characters that can be represented by a computer system.

Multiple Choice

ASCII can represent more characters than UNICODE.

• True

• False

Multiple Choice

ASCII Stands for

• American Standard Code for Information Interchange

• American Scientific Code for Information Interchanging

• Absolute Standard Codes for Instruction Interchange

Multiple Choice

What do we call the smallest unit of data that can be represented in an image?

• Pixel

• Dot

• Colour

• Bit

Multiple Choice

What is meant by colour depth?

• Number of pixels in the image

• The number of colours available for each pixel

• How pixelated the image is

Multiple Choice

How many colours can be represented with a 4 bit colour depth?

• 2

• 4

• 16

• 256

Multiple Choice

What is the term used to define what must be known about a bitmap, for it to be represented accurately?

• Microdata

• Metadata

• Megadata

Multiple Choice

In modern technology what unit of measurement would be used for screen resolution?

• Pixels per inch (PPI)

• Dots per inch (DPI)

• Pixels per meter (PPM)

Multiple Choice

Which of the following is not stored as metadata about an image?

• Height

• Colour depth

• Resolution

• Number of people in the image

Multiple Choice

Which of the following is not an image file?

• PNG

• JPEG

• Bitmap

• MPEG

Multiple Choice

What three colours are used to produce a broad array of colours in a computer system?

• Green, Red, Orange

• Red, Green, Blue

• Yellow, Green, Red

Multiple Choice

What is the name of the type of graphic that uses shapes of solid colour?

• Raster

• GIF

• JPEG

• Vector

Multiple Choice

Identify a false statement:

• Higher bit rates usually improve the sound quality and result in smaller file size.
• Higher bit rates usually improve the sound quality but result in larger file size.
• To record a sound into binary format, ADC will be applied rather than DAC.

Multiple Choice

What is the difference between analogue and digital data?

• Analogue is continuous data, whereas digital signals have two values, 0 and 1.
• Analogue has two values 0 and 1, whereas digital is continuous data.

Multiple Choice

What is sample resolution/bit depth?

• The number of bits used to store each sample

• The number of times a wave is sampled

• How loud a sound is

• How quiet a sound is

Multiple Choice

What is the sample rate?

• The number of times a sound wave is sampled per second

• The number of bits used to store each sample

• How loud a sound is

• The size of the sound wave

Multiple Choice

What is sample rate measure in?

• Bits

• Hertz

• GB

• amps

Multiple Choice

What is used to convert a sound wave in to a digital format?

• A sound wave converter

• A router

• An amplitude to digital converter

• Analogue to digital converter

Multiple Choice

Which of the following is not true if you increase the sample rate?

• Better quality of recording

• Needs greater storage space

• larger file size

• Decrease in quality

Multiple Choice

What is measured when the wave is sampled?

• Amplitude

• Hertz

• Bit rate

• Frequency

Multiple Choice

What sample rate is used for CD quality sound?

• 88,200 Hz

• 44,100 Hz

• 22,100 Hz

Multiple Choice

The purpose of a Digital to Analogue converter is to...

• Convert binary data into analogue form so we can hear it via a speaker

• Convert sound waves into binary so it can be understood by a computer

Multiple Choice

What piece of hardware would you use to input sound into a computer?

• Speaker

• Analogue to digital converter

• Microphone

• Digital to analogue converter

Multiple Choice

If you increase the bit depth of an audio file, you increase the quality.

• Tru

• False

Multiple Choice

What is compression?

• Converts one file to anothe

• Reduces the size of data to save space

• Minimizes the time taken for a file to be downloaded

• Compresses something by pressing it very hard

Multiple Choice

What does Lossy Compression do to files?

• Increases the file size and keeps the same quality

• Eliminates no information at all

• Decreases the file size and keeps the same quality

• Eliminates unnecessary information in a file to reduce file size

Multiple Choice

What does Lossy Compression do to files?

• Increases the file size and keeps the same quality

• Eliminates no information at all

• Decreases the file size and keeps the same quality

• Eliminates unnecessary information in a file to reduce file size

Multiple Choice

What is lossless compression?

• No information is lost but file size is increased

• There is no loss in information at all after compression

• Files which have the exact same data after compression

• Compression that involves an algorithm

Multiple Choice

What type of compression would you use to compress a video?

• Lossy

• Lossless

Multiple Choice

What type of compression does the ZIP format use?

• Lossy

• Lossless

Multiple Choice

What type of compression would you use to compress a text file?

• Lossy

• Lossless

Multiple Choice

What type of compression may remove some of the data?

• Lossy

• Lossless

Multiple Choice

Which of the following are not usually in a compressed format?

• JPEG

• MPEG

• Bitmap

• MP3

Multiple Choice

Uncompressed audio and video files require less memory than compressed files.

• Tre

• False

Multiple Choice

What does the acronym 'RAM' stand for?

• Rapid Automatic Memory

• Readily Accessible Memory

• Rapid Access Memory

• Random Access Memory

Multiple Choice

One characteristic of ROM.

• Volatile
• Non-volatile
• Large capacity in comparison to other types of primary memory external to the CPU
• Read and write

Multiple Choice

What is meant by the term volatile in the context of memory?

• Data is stored on the hard disk
• Data is lost when the power is turned off
• The changing state of the clock
• A description of ROM

Multiple Choice

What is a purpose of the RAM?

• A temporary store for instructions and data
• A permanent store for instructions and data
• To store the bootstrap
• To store the results of calculations from the ALU

Multiple Choice

The RAM might store…

• The instructions to do a power-on-self-test
• The instructions to load the operating system
• Data being used by currently loaded programs
• The instructions not needed at present by the CPU, currently in the virtual memory

Multiple Choice

One characteristic of ROM.

• Small capacity in comparison to other types of primary memory external to the CPU
• Large capacity in comparison to other types of primary memory external to the CPU
• Volatile
• Read and write

Multiple Choice

One characteristic of RAM.

• Volatile
• Read only
• Small capacity in comparison to other types of primary memory external to the CPU
• Non-volatile