Computer set 1 MCQs
Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.
Q.181
Which specific social engineering tactic focuses on highly customized, deceptive emails targeting C-level executives or high-ranking government officials?
A
Vishing
B
Smishing
C
Baiting
D
Whaling
Q.182
Why is a 'Ring 0' Rootkit considered exceptionally dangerous and difficult to detect?
A
It operates at the OS kernel level, allowing it to manipulate system calls and lie to the antivirus software running above it
B
It encrypts the hard drive within seconds
C
It physically damages the motherboard RAM
D
It spreads rapidly via Bluetooth
Q.183
What specific role does the DMARC protocol play in email security infrastructure?
A
It encrypts the body of the email
B
It scans attachments for macro viruses
C
It utilizes DNS records to dictate exactly how a receiving server should handle an email if it fails SPF and DKIM authentication checks
D
It provides a temporary disposable email address
Q.184
How does a BGP Hijacking attack severely disrupt global internet routing?
A
By launching DDoS attacks against local routers
B
By falsely announcing ownership of groups of IP addresses, causing global traffic intended for the victim to route to the attacker's servers instead
C
By deleting DNS root zone files
D
By physically cutting undersea fiber optic cables
Q.185
What significant privacy enhancement does the DNS over HTTPS (DoH) standard provide?
A
It prevents websites from utilizing cookies
B
It masks the user's MAC address from the local router
C
It blocks all third-party pop-up advertisements
D
It encrypts domain name lookup requests, preventing ISPs and network sniffers from seeing which websites a user is visiting
Q.186
How do Content Delivery Networks (CDNs) utilize 'Anycast' routing to improve website load times globally?
A
Multiple servers around the world share the exact same IP address, and routers direct user traffic to the geographically closest server
B
They compress HTML code using AI
C
They broadcast the website data to all users simultaneously like radio waves
D
They cache websites directly onto the user's hard drive permanently
Q.187
In Classless Inter-Domain Routing (CIDR) notation, what does the suffix in an IP address like '192.168.1.0 /24' signify?
A
The maximum number of devices allowed on the network
B
The port number dedicated to HTTP traffic
C
The number of continuous bits in the subnet mask used to define the network portion of the address
D
The expiration time of the DHCP lease in hours
Q.188
Which networking technology is primarily responsible for dramatically slowing down the exhaustion of the limited IPv4 address space?
A
DNS
B
Network Address Translation (NAT)
C
VLANs
D
MAC filtering
Q.189
What revolutionary internet capability does the WebRTC API standard provide natively to modern web browsers?
A
The ability to run full Windows games natively
B
The ability to mine cryptocurrency locally
C
The ability to permanently store websites offline
D
The ability to establish direct, peer-to-peer real-time voice and video communication without installing third-party plugins
Q.190
From a security perspective, what is the primary vulnerability associated with operating a Tor Exit Node?
A
Because it decrypts the final layer of traffic before sending it to the open web, the exit node operator can potentially intercept unencrypted plaintext traffic
B
It automatically downloads illegal files to the host machine
C
It forces the operator's IP address to become public to the internal Tor network
D
It requires disabling the OS firewall
Q.191
What explicit security protection is applied when a web server issues an HTTP cookie with the 'HttpOnly' flag enabled?
A
The cookie cannot be sent over WiFi networks
B
The cookie expires immediately when the browser is closed
C
The cookie is restricted from being accessed by client-side scripts, mitigating Cross-Site Scripting (XSS) theft
D
The cookie encrypts the user's password
Q.192
Why has SMTP port 587 largely replaced the legacy port 25 for modern email client submission?
A
Port 587 supports larger file attachments
B
Port 587 natively supports secure encrypted transmission (STARTTLS) and requires authentication, preventing spam relays
C
Port 587 routes emails through satellite links
D
Port 25 was officially retired by the IEEE in 2010
Q.193
In search engine optimization, what is the primary function of utilizing LSI (Latent Semantic Indexing) keywords?
A
To hide invisible text from users but show it to search engine bots
B
To generate artificial backlinks from blog comments automatically
C
To bypass search engine indexing delays
D
To provide conceptual context to search algorithms by using related terms, rather than simply repeating the main keyword
Q.194
What is the intended effect of implementing a 'Crawl-delay' directive inside a website's robots.txt file?
A
To intentionally throttle the frequency at which search engine spiders request pages, preventing server overload
B
To force search engines to display the website faster in search results
C
To prevent users from navigating the site too quickly
D
To delay the execution of JavaScript on the homepage
Q.195
In information retrieval systems, classifying a user's query as 'Transactional' implies what kind of search intent?
A
The user is looking to navigate to a specific login page
B
The user wants a broad overview of a historical event
C
The user is positioned to perform an action or make a purchase immediately
D
The user is looking to download freeware
Q.196
What user behavior metric, closely monitored by search engine ranking algorithms, is known colloquially as 'Pogo-sticking'?
A
Refreshing the search engine homepage multiple times quickly
B
Clicking a search result, quickly realizing it is unhelpful, and immediately hitting the back button to try another result
C
Opening every single link on the first page in new tabs simultaneously
D
Scrolling to the bottom of the page without reading
Q.197
What is the specific function of Open Graph (OG) meta tags inserted into a webpage's HTML head?
A
They provide 3D rendering instructions for VR headsets
B
They dictate the color scheme for dark mode browsing
C
They prevent the page from being archived by the Wayback Machine
D
They dictate exactly which image, title, and description appear when the link is shared on social media platforms
Q.198
For large international websites, what is the critical SEO purpose of implementing the 'hreflang' HTML attribute?
A
It maps out the relationships between pages in different languages or regions, preventing duplicate content penalties and serving the correct local version
B
It translates the webpage text natively in the browser
C
It forces international visitors to use a VPN
D
It blocks traffic from specific blacklisted countries
Q.199
In the context of modern search architectures like Google's Knowledge Graph, how is information fundamentally structured rather than as simple text strings?
A
As sequential blocks in a decentralized blockchain
B
As a series of interconnected Excel spreadsheets
C
As entities (nodes) connected by defined relationships (edges), often stored as semantic triples
D
As purely mathematical vector hashes
Q.200
As part of Google's Core Web Vitals, what specific user experience metric does Largest Contentful Paint (LCP) measure?
A
The visual stability of the page while scrolling
B
The time it takes for the primary piece of content (like a hero image or main text block) to fully render on screen
C
The delay before the browser responds to a user's first click
D
The total file size of all uncompressed images on the page
Q.201
Which component of the CPU is responsible for performing arithmetic and logical operations?
A
Arithmetic Logic Unit (ALU)
B
Control Unit (CU)
C
Memory Unit
D
Cache
Q.202
During instruction execution, the control unit fetches an instruction from memory and decodes it. What is the immediate next step?
A
Execute the instruction
B
Store the result
C
Fetch the next instruction
D
Increment the program counter
Q.203
Which characteristic of cache memory most directly improves CPU performance by reducing average memory access time?
A
Its proximity to the CPU and high speed
B
Its non-volatile storage capability
C
Its large storage capacity
D
Its ability to execute instructions independently
Q.204
In the binary system, what is the decimal equivalent of the binary number 1101.101?
A
13.625
B
13.5
C
13.125
D
13.75
Q.205
A system has 32-bit address bus. What is the maximum directly addressable memory space?
A
4 GB
B
2 GB
C
16 GB
D
1 GB
Q.206
A byte consists of 8 bits. If a computer uses even parity, what is the parity bit for the data byte 10110011?
B
1
C
None needed
D
Depends on protocol
Q.207
Which generation of computers introduced the concept of integrated circuits and made systems smaller, faster, and more reliable?
A
Third generation
B
Second generation
C
Fourth generation
D
Fifth generation
Q.208
Firmware is typically stored in which type of memory?
A
ROM (Read-Only Memory)
B
RAM
C
Cache
D
Virtual Memory
Q.209
Which of the following is an example of a supercomputer?
A
PARAM
B
ENIAC
C
UNIVAC
D
IBM PC
Q.210
Which peripheral device uses a laser to interpret the reflected light pattern and convert it into digital data?
A
Barcode reader
B
OMR scanner
C
MICR reader
D
Flatbed scanner