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Quizzes > Computers & IT

IT Test: Check Your Information Technology Knowledge

Quick, free IT knowledge test with instant results.

Editorial: Review CompletedCreated By: In-Media KitaUpdated Aug 23, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration for IT quiz on a golden yellow background

This Information Technology quiz helps you check your skills in software, hardware, networking, and cybersecurity, with instant feedback to guide your study. For focused practice, try the computer networking quiz, review key parts with the computer hardware quiz, or build troubleshooting confidence in an it support quiz.

Which component is considered the 'brain' of a computer, responsible for executing instructions?
Random Access Memory (RAM)
Graphics Processing Unit (GPU)
Central Processing Unit (CPU)
Hard Disk Drive (HDD)
The central processing unit (CPU) executes program instructions and processes data, making it the 'brain' of the computer. It performs arithmetic, logic, control, and input/output operations specified by the instructions. Other components like RAM and GPU assist with specific tasks but do not execute the main instruction set. .
What does RAM stand for in computer memory?
Read-Only Memory
Runaway Allocation Memory
Random Access Memory
Readily Available Memory
Random Access Memory (RAM) allows data to be read or written in nearly the same amount of time regardless of its physical location. It is volatile memory used by the CPU for fast data access while running applications. Unlike ROM, RAM loses its content when power is off. .
At which layer of the OSI model does the Ethernet protocol primarily operate?
Data Link Layer
Transport Layer
Physical Layer
Network Layer
Ethernet defines the framing and MAC addressing at the Data Link Layer (Layer 2) of the OSI model. It encapsulates data from the Network Layer into frames and handles error detection and access control. The Physical Layer transmits the bits over the medium, but framing and addressing are Layer 2 functions. .
Which protocol is used to secure web traffic and is indicated by HTTPS in a URL?
Secure Sockets Layer (SSL)
Transport Layer Security (TLS)
Hypertext Transfer Protocol (HTTP)
Secure Shell (SSH)
HTTPS uses Transport Layer Security (TLS) to encrypt HTTP traffic between a client and server, ensuring confidentiality and integrity. TLS is the modern replacement for the older SSL protocol. Without TLS, data transmitted over HTTP would be in plain text. .
In a RAID 5 configuration, what method is used to provide data redundancy?
Striping without Parity
Parity
Disk Mirroring
Hot Spare Disks
RAID 5 uses block-level striping with distributed parity across all disks, allowing the array to recover from a single disk failure. Parity information enables the reconstruction of lost data. Disk mirroring is used in RAID 1, not RAID 5. .
Which IP address class provides up to approximately 16 million hosts on a single network?
Class C
Class D
Class B
Class A
Class A IPv4 addresses range from 1.0.0.0 to 126.255.255.255, allowing for 24 bits of host ID and about 16 million hosts. Class B and C provide fewer host addresses. Class D is reserved for multicast. .
Which Wi-Fi standard operates exclusively on the 5 GHz band?
IEEE 802.11n
IEEE 802.11a
IEEE 802.11g
IEEE 802.11b
IEEE 802.11a was the first WLAN standard to operate only in the 5 GHz band, offering up to 54 Mbps. Standards b and g use the 2.4 GHz band, while n can operate on both. Exclusive use of 5 GHz reduces interference. .
What type of hypervisor runs directly on the host's hardware without requiring an underlying operating system?
Type 2 Hypervisor
Container Hypervisor
Emulation Layer
Type 1 Hypervisor
A Type 1 hypervisor, or bare-metal hypervisor, installs directly on the physical server and manages guest operating systems. It does not require an underlying host OS, offering better performance and isolation. Type 2 hypervisors run on top of a host OS. .
Which routing protocol uses hop count as its primary routing metric?
Open Shortest Path First (OSPF)
Routing Information Protocol (RIP)
Border Gateway Protocol (BGP)
Enhanced Interior Gateway Routing Protocol (EIGRP)
RIP uses hop count as its sole metric to determine the best path, with a maximum of 15 hops. OSPF uses cost, BGP uses path attributes, and EIGRP uses a composite metric. RIP's simplicity makes it suitable for small networks. .
In Linux, what does the 'swappiness' parameter control?
Kernel's tendency to swap memory pages to disk
CPU scheduling priority
Frequency of cache flushes
Maximum disk I/O queue length
The swappiness parameter (0 - 100) defines how aggressively the Linux kernel swaps anonymous memory pages to swap space. A higher value increases swap usage, while a lower value favors keeping data in RAM. Tuning swappiness can improve performance on systems with limited memory. .
Which RAID level combines disk mirroring and disk striping for performance and redundancy?
RAID 6
RAID 01
RAID 5
RAID 10
RAID 10 (1+0) first mirrors pairs of disks (RAID 1) and then stripes data across those mirrored pairs, combining performance and redundancy. RAID 01 stripes first and then mirrors, but has different fault tolerance behavior. RAID 5 and 6 use parity instead. .
Which OSPF LSA type is used for summarizing routes between different OSPF areas?
Type 5 - AS-External LSA
Type 1 - Router LSA
Type 7 - NSSA External LSA
Type 3 - Summary LSA
OSPF Summary LSA (Type 3) is generated by area border routers to advertise networks from one area into another. Type 1 describes internal router links, Type 5 advertises external routes, and Type 7 is used in NSSA areas. Proper use of Type 3 LSAs optimizes routing information exchange. .
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Study Outcomes

  1. Understand Core Software Concepts -

    Master fundamental principles of software architecture, operating systems, and application development through targeted it quiz questions.

  2. Identify Essential Hardware Components -

    Recognize and differentiate between CPUs, memory modules, storage devices, and peripherals to boost your hardware know-how.

  3. Analyze Networking Principles -

    Examine key networking protocols, topologies, and models to improve your grasp of data transmission and connectivity.

  4. Apply Cybersecurity Best Practices -

    Learn to spot common threats, implement basic security measures, and strengthen your defense strategies in IT environments.

  5. Evaluate Overall IT Knowledge -

    Use this information technology quiz as an engaging it test to assess your strengths across software, hardware, networking, and cybersecurity domains.

Cheat Sheet

  1. Operating System Principles -

    Review core OS concepts such as process scheduling, memory management, and file systems to ensure smooth multitasking. Understand how paging and segmentation optimize RAM usage by mapping virtual addresses to physical memory (e.g., page tables versus segments). Use the mnemonic "MPF" (Memory, Processes, Files) to quickly recall these pillars during your it knowledge test.

  2. OSI Model and Networking Basics -

    Master the seven layers of the OSI model - Physical, Data Link, Network, Transport, Session, Presentation, and Application - to diagnose connectivity issues and design robust networks. A popular mnemonic, "Please Do Not Throw Sausage Pizza Away," helps lock in layer order for it tests and it quiz questions. Don't forget to compare IPv4 and IPv6 addressing schemes (32-bit vs. 128-bit) when tackling real-world networking scenarios.

  3. Cybersecurity Fundamentals -

    Focus on the CIA triad - Confidentiality, Integrity, and Availability - to build a strong security mindset for any information technology quiz. Study common encryption algorithms (AES, RSA) and hashing functions (SHA-256) as they form the backbone of secure data transmission. Remember that multi-factor authentication (MFA) exponentially improves defense against unauthorized access.

  4. CPU Performance and Hardware Components -

    Analyze how CPU clock speed, cache hierarchy (L1, L2, L3), and instructions per cycle (IPC) affect overall performance; use the formula Execution Time = Instructions × CPI ÷ Clock Rate for quick calculations. Differentiate between DRAM and SRAM to understand why cache memory is faster but more expensive than main RAM. Reviewing motherboard bus speed and chipset functions can also give you an edge on your next IT test.

  5. Database Systems and Data Management -

    Understand relational database concepts, including primary keys, foreign keys, and SQL commands like SELECT, INSERT, UPDATE, and DELETE for efficient data operations. Memorize the ACID properties (Atomicity, Consistency, Isolation, Durability) to ensure transactional integrity in any it test scenario. A simple mnemonic, "ACID - Always Care In Data," helps cement these critical principles in your memory.

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