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Memory and Storage
How many bits are in one byte?
Correct answer: C
Explanation and memory cue
One byte consists of 8 bits, which is a standard unit of digital information storage in computer science.
Questions 501–525 of 1,397 Computer Science MCQs — start at page 1 for an overview.
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Memory and Storage
How many bits are in one byte?
Correct answer: C
One byte consists of 8 bits, which is a standard unit of digital information storage in computer science.
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Character Encoding
The original 16-bit Unicode standard allowed representation of how many characters?
Correct answer: B
The original 16-bit Unicode standard used 16 bits to represent each character, allowing for 2^16 = 65,536 possible characters. This is why option B is correct.
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Memory and Storage
Which is the largest unit of digital storage among the following? Terabyte, Petabyte, Zettabyte, Yottabyte.
Correct answer: D
Among the given options, Yottabyte is the largest unit of digital storage, followed by Zettabyte, Petabyte, and Terabyte. Yottabyte represents 10^24 bytes, making it the largest unit listed.
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Number Systems
221 Binary coded decimal (BCD) numbers are represented in the form of ____:
Correct answer: D
Binary coded decimal (BCD) represents each decimal digit using a 4-bit binary number, typically from 0000 to 1001 (0 to 9). The options given (0,1; 1,1; 1,2) do not correctly represent the form of BCD encoding, so 'None of these' is the correct choice.
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Character Encoding
How many characters can an 8-bit ASCII code represent?
Correct answer: D
An 8-bit ASCII code can represent 2^8 = 256 different characters, which is why the correct answer is 256 characters.
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Character Encoding
When Unicode was first introduced in 1991, how many bits were used?
Correct answer: C
When Unicode was first introduced in 1991, it was designed as a 16-bit character encoding system, allowing for 65,536 unique code points. This was intended to cover most characters needed at the time.
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Memory and Storage
A sequence of 4 bits is called a ____.
Correct answer: A
A nibble is a sequence of 4 bits. A byte consists of 8 bits, a kilobyte is 1024 bytes, and a megabyte is 1024 kilobytes, so the correct answer is 'Nibble'.
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Memory and Storage
A combination of 16 bits is called ____:
Correct answer: B
A combination of 16 bits is called a Word in computer terminology. A Bit is a single binary digit, a Nibble is 4 bits, and 1024 Bits is not a standard term for 16 bits.
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Binary Number System
In the binary system, which value does 0 represent?
Correct answer: D
In the binary system, the values are 0 and 1. Typically, 0 represents a low voltage or off state, while 1 represents a high voltage or on state. Therefore, 0 corresponds to 'Low'.
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Memory and Storage
225 Bit is also called ____: Binary Unit, Binary Digit, Binary System, or Digital System?
Correct answer: B
A 'bit' stands for 'binary digit,' which is the most basic unit of data in computing, representing a 0 or 1. Therefore, the correct term for 'bit' is 'Binary Digit.'
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Character Encoding
How many bits does EBCDIC use?
Correct answer: C
EBCDIC (Extended Binary Coded Decimal Interchange Code) uses 8 bits per character, allowing for 256 possible character codes. This is why the correct answer is 8 bits.
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Memory and Storage
One Megabyte (MB) is equal to ____:
Correct answer: B
One Megabyte (MB) is commonly defined in two ways: the decimal definition where 1 MB = 1,000,000 bytes (10^6 bytes), and the binary definition where 1 MB = 1,048,576 bytes (2^20 bytes). The binary definition is often used in computer memory contexts and corresponds to 1024 Kilobytes (KB), where 1 KB = 1024 bytes. Therefore, one Megabyte is equal to 1024 Kilobytes, not 1024 Bytes. Option B (1024 Kilo Bytes) is the correct answer in the binary context, which is the common usage in computer science for memory sizes. Option A (1024 Bytes) is incorrect because 1024 Bytes equals 1 Kilobyte, not 1 Megabyte. The other options are incorrect or incomplete.
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Memory and Storage
Which of the following is the smallest unit of storage?
Correct answer: A
A bit is the smallest unit of data storage in computing, representing a binary value of 0 or 1. Nibble, byte, and megabyte are larger units composed of multiple bits.
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Memory and Storage
In computer science, a half-byte is also known as a ____:
Correct answer: C
A half-byte consists of 4 bits and is commonly known as a nibble in computer science. This term is standard and widely accepted.
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Character Encoding
ANSI stands for____:
Correct answer: A
ANSI stands for American National Standards Institute, which is the correct full form among the options provided. It is a private non-profit organization that oversees standards for products, services, processes, and systems in the United States.
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Number Systems
Which of the following is a binary number? 1001, 1002, 1005, 1006
Correct answer: A
A binary number consists only of the digits 0 and 1. Among the options, only '1001' contains exclusively 0s and 1s, making it a valid binary number. The others contain digits 2, 5, or 6, which are not valid in binary representation.
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Graphics Printing
Which printer is known for high-quality graphic printing?
Correct answer: D
Inkjet printers are known for producing high-quality graphic prints with good color accuracy and detail, making them suitable for graphic printing. Digital plotters are typically used for large-scale line drawings and CAD designs, not for high-quality graphic printing.
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Printer Selection
Which type of printer would you use for printing high volumes of text?
Correct answer: B
Laser printers are designed for high-volume text printing due to their fast speed, high-quality output, and cost efficiency compared to inkjet or daisy wheel printers. Digital plotters are used for large-scale graphics, not high-volume text.
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Line Printer Metrics
What is the printing speed of a line printer usually measured in?
Correct answer: C
The printing speed of a line printer is typically measured in lines per minute because it prints an entire line of text at once, making this the most relevant metric for its speed.
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Printer Types
191 Dot Matrix is a type of ____:
Correct answer: B
A 191 Dot Matrix refers to a type of printer that uses a matrix of dots to form characters and images on paper, making it a printer rather than a storage device or slot.
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Buses In Computer Architecture
What does a bus in computer architecture refer to?
Correct answer: B
In computer architecture, a bus is a communication system that transfers data, addresses, and control signals between components of a computer. It is not a CPU, storage device, or memory type.
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Virtual Printing Software
198 ____ is a computer software whose user interface and API resemble that of a printer driver.
Correct answer: A
A virtual printer is a type of computer software that mimics the interface and API of a physical printer driver, allowing applications to 'print' to a file or another output format instead of paper. This matches the description given, making option A correct.
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Usb Communication
USB can transfer data over a ____.
Correct answer: B
USB (Universal Serial Bus) is designed for short-distance data transfer, typically within a few meters, such as connecting peripherals to a computer. It is not suitable for long-distance or internet data transfer.
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Bus Functions
Which bus carries the actual data being transferred between components?
Correct answer: C
The Data Bus is responsible for carrying the actual data being transferred between components in a computer system. The Address Bus carries address information, the Control Bus carries control signals, and Serial Bus refers to a type of data transmission, not a specific bus carrying data between components.
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Internal Data Transfer
Which bus is used to transfer data internally in a computer?
Correct answer: A
The data bus is specifically used to transfer data internally within a computer between components. The address bus carries memory addresses, and the control bus carries control signals, so they do not transfer data itself.