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Computer Science

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Questions 501–525 of 1,397 Computer Science MCQs — start at page 1 for an overview.

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501

Read Mode

Memory and Storage

easy
Computer Science

How many bits are in one byte?

Correct answer: C

A
2
B
4
C
8
Correct
D
5
Explanation and memory cue

One byte consists of 8 bits, which is a standard unit of digital information storage in computer science.

502

Read Mode

Character Encoding

easy
Computer Science

The original 16-bit Unicode standard allowed representation of how many characters?

Correct answer: B

A
32,768
B
65,536
Correct
C
1,114,112
D
256
Explanation and memory cue

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.

503

Read Mode

Memory and Storage

easy
Computer Science

Which is the largest unit of digital storage among the following? Terabyte, Petabyte, Zettabyte, Yottabyte.

Correct answer: D

A
Terabyte
B
Petabyte
C
Zettabyte
D
Yottabyte
Correct
Explanation and memory cue

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.

504

Read Mode

Number Systems

easy
Computer Science

221 Binary coded decimal (BCD) numbers are represented in the form of ____:

Correct answer: D

A
0,1
B
1,1
C
1,2
D
None of these
Correct
Explanation and memory cue

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.

505

Read Mode

Character Encoding

easy
Computer Science

How many characters can an 8-bit ASCII code represent?

Correct answer: D

A
1000 characters
B
156 characters
C
390 characters
D
256 characters
Correct
Explanation and memory cue

An 8-bit ASCII code can represent 2^8 = 256 different characters, which is why the correct answer is 256 characters.

506

Read Mode

Character Encoding

medium
Computer Science

When Unicode was first introduced in 1991, how many bits were used?

Correct answer: C

A
8 bits
B
12 bits
C
16 bits
Correct
D
21 bits
Explanation and memory cue

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.

507

Read Mode

Memory and Storage

easy
Computer Science

A sequence of 4 bits is called a ____.

Correct answer: A

A
Nibble
Correct
B
Byte
C
Kilobyte
D
Megabyte
Explanation and memory cue

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'.

508

Read Mode

Memory and Storage

easy
Computer Science

A combination of 16 bits is called ____:

Correct answer: B

A
Bit
B
Word
Correct
C
Nibble
D
1024 Bits
Explanation and memory cue

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.

509

Read Mode

Binary Number System

easy
Computer Science

In the binary system, which value does 0 represent?

Correct answer: D

A
On
B
Off
C
Start
D
Low
Correct
Explanation and memory cue

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'.

510

Read Mode

Memory and Storage

easy
Computer Science

225 Bit is also called ____: Binary Unit, Binary Digit, Binary System, or Digital System?

Correct answer: B

A
Binary Unit
B
Binary Digit
Correct
C
Binary System
D
Digital System
Explanation and memory cue

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.'

511

Read Mode

Character Encoding

easy
Computer Science

How many bits does EBCDIC use?

Correct answer: C

A
7 bits
B
4 bits
C
8 bits
Correct
D
16 bits
Explanation and memory cue

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.

512

Read Mode

Memory and Storage

easy
Computer Science

One Megabyte (MB) is equal to ____:

Correct answer: B

A
1024 Bytes
B
1024 Kilo Bytes
Correct
C
1024 Giga Bits
D
Kilobyte
Explanation and memory cue

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.

513

Read Mode

Memory and Storage

easy
Computer Science

Which of the following is the smallest unit of storage?

Correct answer: A

A
Bit
Correct
B
Nibble
C
Byte
D
Megabyte
Explanation and memory cue

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.

514

Read Mode

Memory and Storage

easy
Computer Science

In computer science, a half-byte is also known as a ____:

Correct answer: C

A
Word
B
Four bits
C
Nibble
Correct
D
None of these
Explanation and memory cue

A half-byte consists of 4 bits and is commonly known as a nibble in computer science. This term is standard and widely accepted.

515

Read Mode

Character Encoding

easy
Computer Science

ANSI stands for____:

Correct answer: A

A
American National Standards Institute
Correct
B
American New Standard Institute
C
American New Standard Institution
D
Australian National Standard Institute
Explanation and memory cue

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.

516

Read Mode

Number Systems

easy
Computer Science

Which of the following is a binary number? 1001, 1002, 1005, 1006

Correct answer: A

A
1001
Correct
B
1002
C
1005
D
1006
Explanation and memory cue

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.

517

Read Mode

Graphics Printing

easy
Computer Science

Which printer is known for high-quality graphic printing?

Correct answer: D

A
Line Printer
B
Laser Printer
C
Digital Plotter
D
Inkjet Printer
Correct
Explanation and memory cue

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.

518

Read Mode

Printer Selection

easy
Computer Science

Which type of printer would you use for printing high volumes of text?

Correct answer: B

A
Digital Plotter
B
Laser Printer
Correct
C
Inkjet Printer
D
Daisy Wheel Printer
Explanation and memory cue

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.

519

Read Mode

Line Printer Metrics

easy
Computer Science

What is the printing speed of a line printer usually measured in?

Correct answer: C

A
Pages per minute
B
Characters per second
C
Lines per minute
Correct
D
Pixels per second
Explanation and memory cue

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.

520

Read Mode

Printer Types

easy
Computer Science

191 Dot Matrix is a type of ____:

Correct answer: B

A
Storage device
B
Printer
Correct
C
Special slot
D
None of these
Explanation and memory cue

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.

521

Read Mode

Buses In Computer Architecture

easy
Computer Science

What does a bus in computer architecture refer to?

Correct answer: B

A
A central processing unit
B
A pathway for transmitting data, addresses, and control signals
Correct
C
A type of storage device
D
A type of memory
Explanation and memory cue

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.

522

Read Mode

Virtual Printing Software

medium
Computer Science

198 ____ is a computer software whose user interface and API resemble that of a printer driver.

Correct answer: A

A
Virtual Printer
Correct
B
Plotter
C
Scanner
D
None of these
Explanation and memory cue

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.

523

Read Mode

Usb Communication

easy
Computer Science

USB can transfer data over a ____.

Correct answer: B

A
Long Distance Internet
B
Short Distance
Correct
C
None of these
D
Wireless connection
Explanation and memory cue

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.

524

Read Mode

Bus Functions

easy
Computer Science

Which bus carries the actual data being transferred between components?

Correct answer: C

A
Address Bus
B
Control Bus
C
Data Bus
Correct
D
Serial Bus
Explanation and memory cue

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.

525

Read Mode

Internal Data Transfer

easy
Computer Science

Which bus is used to transfer data internally in a computer?

Correct answer: A

A
Data bus
Correct
B
Control bus
C
Address bus
D
System bus
Explanation and memory cue

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.