DCET IT Skills Exam Trap Buster Sheet

🚫 TOP 10 DEADLY DCET MISCONCEPTIONS DEBUNKED

Exam Traps

#	Student Misconception (Trap)	The Technical Reality (KEA Key)
1	"Internet and WWW are identical terms" ❌	Internet is the global physical infrastructure/network. WWW is an information service operating on top of it using HTTP.
2	"HTML is a programming language" ❌	HTML is a Markup Language. It has no loops, variables, logic, or algorithmic computation.
3	"HTTP and HTTPS differ only in speed" ❌	HTTPS adds TLS/SSL cryptographic encryption over Port 443; protects against eavesdropping & tampering.
4	"V8 is a web page rendering engine" ❌	V8 is Google's JavaScript compiler engine. Blink is the rendering engine that draws HTML/CSS.
5	"IP address is permanently burnt into your NIC" ❌	MAC address is physical hardware identifier (48-bit). IP address is logical and dynamically allocated (DHCP).
6	"Browser cookies are executable software programs" ❌	Cookies are passive plaintext key-value text files stored by the browser. They cannot run code or viruses.
7	"TCP is faster than UDP" ❌	UDP is faster because it is connectionless without handshakes or retransmissions. TCP prioritizes reliability over speed.
8	"Ping command uses TCP protocol" ❌	Ping uses ICMP (Internet Control Message Protocol) operating directly at the Network Layer (IP).
9	"A Web Server can natively run dynamic PHP/Python code" ❌	Web servers serve static files. They need an Application Server, CGI gateway, or FastCGI process to execute scripts.
10	"Private IP addresses can be routed on the public Internet" ❌	RFC 1918 Private IPs (e.g. 192.168.x.x, 10.x.x.x) are non-routable on the Internet; they require NAT (Network Address Translation).

⚡ 15 RAPID TRUE / FALSE DCET DIAGNOSTIC DRILLS

Speed Challenge

1. DNS uses both UDP port 53 (queries) and TCP port 53 (zone transfers).

TRUE: Standard DNS lookups use fast UDP; large zone transfers use TCP.

2. JavaScript can directly modify files on the client machine's local hard drive.

FALSE: Browser sandbox security strictly prevents unauthorized local disk access.

3. HTTPS encrypts both the URL path and the payload body.

TRUE: TLS encrypts entire HTTP request except initial domain name in SNI.

4. IPv6 addresses are written using dotted-decimal notation.

FALSE: IPv4 is dotted-decimal; IPv6 uses colon-separated hexadecimal notation.

5. SMTP is a pull protocol used by clients to fetch emails.

FALSE: SMTP is a PUSH protocol (sends mail). POP3 and IMAP are PULL protocols (retrieve mail).

6. CSS Flexbox is a 2-dimensional layout system.

FALSE: Flexbox is 1-dimensional (row OR column). CSS Grid is 2-dimensional (rows AND columns).

7. A switch operates at Layer 2 (Data Link Layer) of OSI model.

TRUE: Switches forward frames using hardware MAC address tables.

8. HTTP response code 503 means 'Gateway Timeout'.

FALSE: 503 = Service Unavailable. 504 = Gateway Timeout.

9. Asymmetric cryptography requires both sender and receiver to share identical keys.

FALSE: That is symmetric encryption. Asymmetric uses Public/Private key pairs.

10. FTP uses separate control (Port 21) and data (Port 20) channels.

TRUE: FTP is an out-of-band dual-port protocol.

ADVITIYA ACADEMY OF LEARNING