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100+ Free OSAT Computer Science (OK181) Practice Questions

Pass your Oklahoma Subject Area Test (OSAT) Computer Science (181) exam on the first try — instant access, no signup required.

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100+ Questions
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1 / 100
Question 1
Score: 0/0

Which value most clearly requires a floating-point data type rather than an integer?

A
B
C
D
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2026 Statistics

Key Facts: OSAT Computer Science (OK181) Exam

OK181

Current CEOE Test Code for OSAT Computer Science

CEOE Tests Page

80 + 1

Selected-Response Questions + Constructed-Response Assignment

OSAT Computer Science (181) Test Page

4h testing

Testing Time

OSAT Computer Science (181) Test Page

4h15m

Total Appointment Time

OSAT Computer Science (181) Test Page

240

Passing Score

OSAT Computer Science (181) Test Page

$118

Current Test Fee

OSAT Computer Science (181) Test Page

30%

Programming and Program Development Weight

OSAT Computer Science (181) Test Design and Framework

15%

Pedagogy Constructed-Response Weight

OSAT Computer Science (181) Test Design and Framework

None

Reference Materials Provided

OSAT Computer Science (181) Test Page

Not publicly reported

Official Pass Rate

Official CEOE/Pearson pages reviewed

For 2026 planning, OSAT Computer Science (OK181) is a computer-based CEOE/Pearson exam with 80 selected-response questions, one constructed-response assignment, a 4-hour testing time inside a 4 hour 15 minute appointment, a 240 passing score, and a $118 test fee. The selected-response subareas are weighted 17% Computer System Concepts, 20% Computational Thinking and Algorithm Design, 30% Programming and Program Development, and 18% Learning Environments and Social Impacts of Computing; the pedagogy constructed-response assignment accounts for 15%. The official test page lists no reference materials provided for this test.

Sample OSAT Computer Science (OK181) Practice Questions

Try these sample questions to test your OSAT Computer Science (OK181) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1An uncompressed black-and-white image stores one bit per pixel. How many bits are needed to store an 8 by 8 image?
A.8 bits
B.16 bits
C.64 bits
D.256 bits
Explanation: An 8 by 8 image has 64 pixels. If each pixel uses one bit, the image data require 64 bits before considering any file headers or metadata.
2A photo-sharing site stores preview images using lossy compression. What is the main tradeoff of lossy compression?
A.It can reduce file size by permanently discarding some information
B.It always reconstructs the original file bit-for-bit
C.It prevents the file from being transmitted over a network
D.It turns all image pixels into executable instructions
Explanation: Lossy compression reduces data size by removing information considered less important for the intended use. The tradeoff is that the exact original data cannot be perfectly recovered.
3A student installs a new printer, but the computer cannot communicate with it until printer software is installed. What is the likely role of that software?
A.It acts as a device driver so the operating system can control the printer
B.It changes the printer into main memory
C.It encrypts all network packets by default
D.It sorts every document before printing
Explanation: Device drivers help the operating system communicate with hardware. Installing the correct driver can allow applications and the OS to send print jobs using the printer's expected commands.
4A user can connect to a website by typing its numeric IP address but not by typing its domain name. Which service should be checked first?
A.DNS name resolution
B.The monitor refresh rate
C.The keyboard language setting
D.The printer queue
Explanation: The Domain Name System maps human-readable domain names to IP addresses. If direct IP access works but the name does not, DNS resolution is a likely point of failure.
5A wireless laptop shows a strong Wi-Fi signal but cannot reach any websites. Which next step best narrows the problem?
A.Check whether the laptop has a valid IP address and default gateway
B.Replace the laptop screen
C.Convert all documents to PDF
D.Change the desktop wallpaper
Explanation: A strong wireless signal only shows local radio connectivity to an access point. Checking IP configuration and gateway information helps determine whether the device can communicate beyond the local wireless link.
6In an RGB color code written as hexadecimal #FF0000, what color component is at maximum intensity?
A.Red
B.Green
C.Blue
D.All three components equally
Explanation: In #RRGGBB notation, the first two hexadecimal digits represent red, the next two green, and the last two blue. FF is the maximum two-digit hexadecimal value, so red is at maximum while green and blue are 00.
7Which binary number is equivalent to decimal 13?
A.1011
B.1101
C.1110
D.1001
Explanation: Binary 1101 represents 8 + 4 + 0 + 1, which equals 13. Each bit corresponds to a power of 2.
8Which decimal value is represented by hexadecimal 2A?
A.20
B.32
C.42
D.210
Explanation: In hexadecimal, A represents decimal 10. The value of 2A is 2 * 16 + 10 = 42.
9Why can text, images, and sound all be stored on a computer as binary data?
A.They can be encoded as patterns of bits using agreed-upon representation schemes
B.They are all naturally made of only the digits 0 and 1
C.They must all be stored as the same file type
D.They cannot be transmitted over networks
Explanation: Computers store and process data as bits, but different media require encoding schemes. Text, images, and sound can each be represented by binary patterns interpreted according to formats or standards.
10Which component is primarily responsible for executing program instructions in a typical computer?
A.Central processing unit
B.Monitor
C.Speaker
D.External mouse
Explanation: The central processing unit, or CPU, fetches and executes program instructions. Peripherals such as monitors, speakers, and mice support input or output but do not primarily execute instructions.

About the OSAT Computer Science (OK181) Exam

OSAT Computer Science (181) is the Oklahoma Subject Area Test for prospective computer science educators. The official framework covers computer system concepts, computational thinking and algorithm design, programming and program development, learning environments and social impacts of computing, and a pedagogy constructed-response task based on lesson plans, student work, or assessment data.

Assessment

80 selected-response questions and 1 constructed-response assignment; selected-response content is weighted 85% and constructed-response pedagogy is weighted 15%.

Time Limit

4h 15m appointment (4h testing plus 15m CBT tutorial/NDA)

Passing Score

240

Exam Fee

$118 (Certification Examinations for Oklahoma Educators (CEOE) / Pearson Evaluation Systems)

OSAT Computer Science (OK181) Exam Content Outline

17%

Computer System Concepts

Data representation, hardware components, operating systems, application software, databases and data tools, web development, network media, architectures, hardware, IP and MAC addressing, protocols, packet switching, Internet structure, and security and privacy issues.

20%

Computational Thinking and Algorithm Design

Problem solving, algorithm design, abstraction, decomposition, sequence, selection, iteration, pseudocode, block-based visual programs, modeling and simulation, algorithm output, search and sort algorithms, correctness, efficiency, time-space trade-offs, and limits of computation.

30%

Programming and Program Development

Software development cycle, high-level language syntax and semantics, common errors, debugging, documentation, primitive data types, strings, constants, variables, classes, lists, arrays, statements, operators, conditionals, loops, methods, parameters, encapsulation, inheritance, constructors, libraries, and predefined classes.

18%

Learning Environments and Social Impacts of Computing

Digital artifact tools, innovative thinking, collaboration, developmentally appropriate instructional tools, assessment data, diversity, gender and equitable access, safe technology use, student privacy, legal and ethical use, cybersecurity, intellectual property, digital divide, data collection, commerce, culture, and computing history.

15%

Pedagogy

Constructed-response analysis of standards-based computer science learning goals, student work or assessment data, instructional strategies for diverse learners, future instruction, and lesson-plan effectiveness.

How to Pass the OSAT Computer Science (OK181) Exam

What You Need to Know

  • Passing score: 240
  • Assessment: 80 selected-response questions and 1 constructed-response assignment; selected-response content is weighted 85% and constructed-response pedagogy is weighted 15%.
  • Time limit: 4h 15m appointment (4h testing plus 15m CBT tutorial/NDA)
  • Exam fee: $118

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

OSAT Computer Science (OK181) Study Tips from Top Performers

1Prioritize Programming and Program Development because it is the largest selected-response subarea at 30%. Practice tracing code, identifying syntax versus logic errors, debugging loops, and applying object-oriented concepts.
2For Computational Thinking and Algorithm Design, practice pseudocode tracing, flowcharts, abstraction, decomposition, loops, conditionals, searches, sorts, and basic efficiency comparisons.
3For Computer System Concepts, review binary and hexadecimal representation, bytes, hardware components, the instruction cycle, operating system resource management, web technologies, network hardware, IP and MAC addressing, protocols, packet switching, and common security threats.
4For Learning Environments and Social Impacts, connect CS content to classroom practice: equitable access, inclusive tools, student privacy, cybersecurity, intellectual property, data collection, collaboration, and assessment-informed instruction.
5For the pedagogy constructed response, practice using evidence from student work to identify a strength, a specific need, and a targeted instructional next step that fits the computer science learning goal.

Frequently Asked Questions

How many questions are on the OSAT Computer Science (181)?

The official test page lists 80 selected-response questions and 1 constructed-response assignment. The selected-response portion is weighted 85% of the scaled score and the constructed-response pedagogy assignment is weighted 15%.

What is the passing score for OSAT Computer Science OK181?

The official OSAT Computer Science (181) test page and study guide list a passing score of 240.

How much does OSAT Computer Science (181) cost?

The current official test fee listed on the OSAT Computer Science (181) test page is $118.

How long is the OSAT Computer Science (181) exam?

The appointment is 4 hours and 15 minutes total, including 15 minutes for the CBT tutorial and nondisclosure agreement and 4 hours of testing time.

What is the most heavily weighted OSAT Computer Science content area?

Programming and Program Development is the largest selected-response subarea at 30% of the test, followed by Computational Thinking and Algorithm Design at 20%.

Are reference materials provided for OSAT Computer Science (181)?

No. The official test page lists reference materials provided for this test as none.