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WGU D684 Introduction to Computer Science Course –
Complete Study Guide, Assessments, and Exam Prep 2025
Master the WGU D684 Introduction to Computer Science course with this 2025 study guide
and exam prep resource. Learn key concepts in programming, algorithms, and computational
thinking with practical tips to pass assessments and performance tasks confidently.
• WGU D684 Introduction to Computer Science
• WGU D684 course guide
•
Which disk scheduling algorithm selects the request closest to the current head position?
- Elevator (SCAN)
- Circular SCAN (C-SCAN)
- Shortest seek time first (SSTF)
- First-come, first-served (FCFS) - ANSWER-Shortest seek time first (SSTF)
What is the main disadvantage of the first-come, first-served (FCFS) disk scheduling algorithm?
- Complexity of implementation
- High seek time
- Starvation of certain requests
- Unpredictable performance - ANSWER-High seek time
Which disk scheduling algorithm minimizes the total seek time by scanning in both directions across the
disk?
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- Elevator (SCAN)
- Circular SCAN (C-SCAN)
- First-come, first-served (FCFS)
- Shortest seek time first (SSTF) - ANSWER-Elevator (SCAN)
What is the primary function of the CPU in a computer?
- Store data for long-term use
- Manage network connections
- Perform calculations and execute instructions
- Display graphics on the monitor - ANSWER-Perform calculations and execute instructions
Which file extension is typically associated with a text file?
- .mp3
- .exe
- .jpg
- .txt - ANSWER-.txt
Which statement describes a binary file?
- A program source file with a .java extension
- A script file with a .sh extension
- An image file with a .png extension
- A file containing plain text - ANSWER-An image file with a .png extension
In a hierarchical file system, what is the top-level directory called?
- Root directory
- Subdirectory
- Parent directory
- Home directory - ANSWER-Root directory
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In a hierarchical file system, what is a subdirectory?
- The directory containing the operating system
- A temporary storage location
- The main directory of the file system
- A directory within another directory - ANSWER-A directory within another directory.
Which statement describes a relative path?
- The path that points to the root directory
- The path to a file or directory relative to the current working directory
- The complete path from the root directory to a file or directory
- The path the operating system uses to locate system files - ANSWER-The path to a file or directory
relative to the current working directory
What is the primary goal of disk scheduling algorithms?
- To increase the size of the disk
- To minimize seek time and maximize throughput
- To improve data compression
- To manage user permissions - ANSWER-To minimize seek time and maximize throughput
Which component is considered volatile memory?
- ROM
- Hard drive
- SSD
- RAM - ANSWER-RAM
Which storage device typically offers the fastest data access speed?
- Solid state drive (SSD)
- Hard disk drive (HDD)
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- Optical drive
- USB flash drive - ANSWER-Solid state drive (SSD)
Which component is directly responsible for executing the instructions of a computer program?
- Hard drive
- Power supply
- CPU
- RAM - ANSWER-Allocating fixed-sized blocks of memory.
Which memory component is an example of nonvolatile memory?
- Register
- Cache memory
- RAM
- ROM - ANSWER-ROM
Which type of memory is used to temporarily store data that the CPU needs while performing tasks?
- SSD
- ROM
- RAM
- Hard drive - ANSWER-RAM
Which term refers to the number of bits a computer can process at one time?
- Clock speed
- Core count
- Bus width
- Cache size - ANSWER-Bus width
What is the primary function of the ALU in a CPU?
- Storing frequently accessed data
WGU D684 Introduction to Computer Science Course –
Complete Study Guide, Assessments, and Exam Prep 2025
Master the WGU D684 Introduction to Computer Science course with this 2025 study guide
and exam prep resource. Learn key concepts in programming, algorithms, and computational
thinking with practical tips to pass assessments and performance tasks confidently.
• WGU D684 Introduction to Computer Science
• WGU D684 course guide
•
Which disk scheduling algorithm selects the request closest to the current head position?
- Elevator (SCAN)
- Circular SCAN (C-SCAN)
- Shortest seek time first (SSTF)
- First-come, first-served (FCFS) - ANSWER-Shortest seek time first (SSTF)
What is the main disadvantage of the first-come, first-served (FCFS) disk scheduling algorithm?
- Complexity of implementation
- High seek time
- Starvation of certain requests
- Unpredictable performance - ANSWER-High seek time
Which disk scheduling algorithm minimizes the total seek time by scanning in both directions across the
disk?
,2|Page
- Elevator (SCAN)
- Circular SCAN (C-SCAN)
- First-come, first-served (FCFS)
- Shortest seek time first (SSTF) - ANSWER-Elevator (SCAN)
What is the primary function of the CPU in a computer?
- Store data for long-term use
- Manage network connections
- Perform calculations and execute instructions
- Display graphics on the monitor - ANSWER-Perform calculations and execute instructions
Which file extension is typically associated with a text file?
- .mp3
- .exe
- .jpg
- .txt - ANSWER-.txt
Which statement describes a binary file?
- A program source file with a .java extension
- A script file with a .sh extension
- An image file with a .png extension
- A file containing plain text - ANSWER-An image file with a .png extension
In a hierarchical file system, what is the top-level directory called?
- Root directory
- Subdirectory
- Parent directory
- Home directory - ANSWER-Root directory
,3|Page
In a hierarchical file system, what is a subdirectory?
- The directory containing the operating system
- A temporary storage location
- The main directory of the file system
- A directory within another directory - ANSWER-A directory within another directory.
Which statement describes a relative path?
- The path that points to the root directory
- The path to a file or directory relative to the current working directory
- The complete path from the root directory to a file or directory
- The path the operating system uses to locate system files - ANSWER-The path to a file or directory
relative to the current working directory
What is the primary goal of disk scheduling algorithms?
- To increase the size of the disk
- To minimize seek time and maximize throughput
- To improve data compression
- To manage user permissions - ANSWER-To minimize seek time and maximize throughput
Which component is considered volatile memory?
- ROM
- Hard drive
- SSD
- RAM - ANSWER-RAM
Which storage device typically offers the fastest data access speed?
- Solid state drive (SSD)
- Hard disk drive (HDD)
, 4|Page
- Optical drive
- USB flash drive - ANSWER-Solid state drive (SSD)
Which component is directly responsible for executing the instructions of a computer program?
- Hard drive
- Power supply
- CPU
- RAM - ANSWER-Allocating fixed-sized blocks of memory.
Which memory component is an example of nonvolatile memory?
- Register
- Cache memory
- RAM
- ROM - ANSWER-ROM
Which type of memory is used to temporarily store data that the CPU needs while performing tasks?
- SSD
- ROM
- RAM
- Hard drive - ANSWER-RAM
Which term refers to the number of bits a computer can process at one time?
- Clock speed
- Core count
- Bus width
- Cache size - ANSWER-Bus width
What is the primary function of the ALU in a CPU?
- Storing frequently accessed data
