Explanation

• There are 128 characters in standard ASCII, numbered from 0 to 127.
• (Note: Extended ASCII uses 8 bits to provide 256 characters, but the original standard ASCII uses a 7-bit code). 

Additional information:

• • ASCII: American Standard Code for Information Interchange.
  • Purpose: Character encoding standard.
  • Includes letters, numbers & symbols.
  • Work began in May 1961.
  • Definitive version published in 1967.

Explanation

• Compiler: Translates high-level language → machine language.
• Machine Language: Binary code (0s and 1s).
• Compiler: Translates the whole program before execution.

• Interpreter: Translates code line by line at runtime.
• Modem: Modulates and demodulates signals for communication; it does not translate programming languages.

Last updated NS on 13-09-2026

Explanation

• SATA: Serial Advanced Technology Attachment
• Type: Computer hardware interface
• Used for: Connecting storage devices
• Devices: HDDs, SSDs & optical drives
• Connection: Storage device → Motherboard

Last updated NS on 13-09-2026

Explanation

• Compiler checks: syntax errors and some semantic/type errors.
• The compiler does not check whether the sentence is grammatically correct in natural English.

Last updated: 13-09-2026

Explanation

• A firewall’s main function is to prevent or block unauthorized access to a computer network.
• It acts as a security barrier between trusted and untrusted networks (like the internet).
• It filters incoming and outgoing network traffic based on security rules.
• It helps protect systems from hackers and unwanted access attempts.

Last verified on 10-06-2026

Explanation

• FTP (File Transfer Protocol) is specifically designed to transfer files between computers over the internet.
• It allows uploading, downloading, and managing files on remote servers.

Last verified on 13-09-2026

Explanation

• The SQL command used to retrieve data from a database table is the SELECT statement.
• This command is fundamental to the Data Query Language (DQL) in SQL.

Last verified on 07-06-2026

Explanation

• Gateway — connects networks with different protocols; performs protocol conversion (works up to the application layer).

Additional information:

• Bridge — connects networks using the same protocol (data link layer).
• Router — connects networks using the same protocol, typically IP (network layer).

Last updated NA on 10-09-2026

Explanation

• A half-byte, also known as a nibble.
• Size: It consists of 4 bits, which is exactly half of an 8-bit byte.
• It can represent 16 different values, from 0000 to 1111.
• It is also called a tetrade, quadbit, or semi-octet

Last updated NA on 10-09-2026

Explanation

• Compiler/Windows XP is not hardware; it is software.
• Compiler: A program that translates computer code into machine language.
• Windows XP: An operating system that runs computer programs.

Additional information:

• CPU, RAM, Hard Disk, Monitor, and Chip are all hardware.
• A compiler is software that converts code into machine language.
• Windows XP is an operating system.

Last updated by NA on 09-09-2026