Free Web and Mobile Development MCQs with Answers

• A. 4322
• B. 2314
• C. 7334
• D. 3128

Explanation: Squid uses TCP port 3128 by default for its proxy service. Other ports can be configured, but 3128 is the standard default.

• A. UDP
• B. RARP
• C. FTP
• D. TELNET

Explanation: TELNET provides interactive remote terminal access over TCP. FTP transfers files, UDP is a transport protocol, and RARP maps hardware…

• A. 127 networks and 16,777,216 nodes per network
• B. 16,384 networks and 65,534 nodes per network
• C. 2,097,152 networks and 254 nodes per network
• D. All of the above

Explanation: A Class B address has 14 network bits and 16 host bits, giving 2^14 = 16,384 networks and 2^16 - 2 = 65,534 usable hosts per network.

• A. SSH
• B. time
• C. ntalk
• D. finger

Explanation: Traditional inetd commonly manages services such as time, ntalk, and finger, whereas SSH normally runs as its own persistent sshd service.

• A. Class A
• B. Class B
• C. Class C
• D. All of the above

Explanation: Class A networks provide a small number of network IDs but a very large number of host addresses per network.

• A. POP3
• B. FTP
• C. MAP
• D. All of the above

Explanation: POP3 is a mail-retrieval protocol that downloads messages from a mail server to a mail reader.

• A. TELNET
• B. TFTP
• C. FTP
• D. RARP

Explanation: TFTP is a simplified file-transfer protocol using minimal commands and overhead, commonly for booting or transferring configuration files.

• A. stream control transmission protocol
• B. internet control message protocol
• C. neighbor discovery protocol
• D. dynamic host configuration protocol

Explanation: SCTP, or Stream Control Transmission Protocol, operates at the transport layer like TCP and UDP.

• A. Control key
• B. Space bar
• C. Printer
• D. Mouse

Explanation: The space bar inserts a blank space and advances the cursor by one position.

• A. internet architecture board
• B. internet society
• C. internet research task force
• D. internet corporation for assigned names and numbers

Explanation: ICANN accredits domain-name registrars and coordinates the global domain-name system.

• A. Wand
• B. Light pen
• C. Mouse
• D. Touch tablet

Explanation: A wand, or barcode wand, is a handheld optical scanner that reads the patterns printed on products, labels, and shelves.

• A. 1950
• B. 1942
• C. 1948
• D. 1956

Explanation: The light pen is commonly dated to about 1950 in basic computer-history references, when early interactive display systems were being…

• A. Mouse
• B. Icon
• C. Keyboard
• D. Hard disk

Explanation: A mouse is commonly used to select items, highlight text, and position the pointer on screen.

• A. Monitor
• B. ALU
• C. CD-ROM
• D. RAM

Explanation: A CD-ROM is an optical disc that stores information permanently for normal users and is read by a laser.

• A. explode if exposed to high temperatures
• B. lose its contents if currents it turned off
• C. be used for data storage only
• D. be used to both read and write data

Explanation: Volatile memory requires electrical power to preserve its contents, so the data is lost when the current is switched off.

• A. uniform resource identifier
• B. unique resource locator
• C. unique resource identifier
• D. none of the above

Explanation: HTTP resources are identified by a Uniform Resource Identifier, or URI.

• A. Cache memory
• B. RAM memory
• C. cache
• D. hard disk

Explanation: A hard disk is a non-volatile storage device that retains data after power is removed.

• A. WAN
• B. NIC
• C. GPS
• D. LAN

Explanation: GPS is a space-based satellite navigation system that determines location from signals received from multiple satellites, commonly…

• A. Input Output
• B. World Viewer
• C. Internet Browser
• D. Computer Outlook

Explanation: An internet browser provides a graphical interface for accessing websites and web pages through an internet service provider.

• A. Bandwidth
• B. Broadband
• C. Capacity
• D. Bitrate

Explanation: Bandwidth is the maximum data-carrying capacity or throughput of a communication channel.