2級電気通信工事施工管理学科過去問題/令和8年1次前期～R1

Past exam questions for the Level 2 Telecommunications Construction Management Engineer (Subject) exam, covering 12 sessions from the first half of the 8th year of Reiwa (2026) to the first half of the 2025 year (2024), including the second half of the 2023 year, the first half of the 2023 year, the second half of the 2022 year, the first half of the 2022 year, the second half of the 2021 year, the first half of the 2021 year, the second half of the 2020 year, the second half of the 2019 year, and the first half of the 2019 year.
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*This includes past exam questions from 2024 (first and second semesters), 2023 (first and second semesters), 2022 (first and second semesters), 2021 (first and second semesters), 2020 (second semester), and 2019 (first and second semesters).

*Question No. 51 from the first semester of 2024 is omitted due to display limitations.

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Reiwa 6 (2024) [1st Stage] First Semester Question [No. 1]
Which of the following is the appropriate value for capacitance C' [F] when the distance d [m] between electrodes is halved and the area S [m²] is doubled?
However, the edge effect of the capacitor is negligible.

4C [F]

Reiwa 6 (2024) [1st Stage] First Semester Question [No. 2]
In the bridge circuit shown in the figure below, when points A and B are at the same potential, which of the following is the appropriate value for R [Ω]?

Reiwa 6th Year [1st Stage] First Semester Problem [No. 3]
In the RL parallel circuit shown in the figure below, when the resistance R = 1 [Ω] and the inductive reactance XL = 1/√3 [Ω], which of the following is the appropriate value for the magnitude of the combined impedance Z [Ω]?

Reiwa 6th Year [1st Stage] First Semester Problem [No. 4]
Which of the following is the appropriate hexadecimal conversion of the binary number 1010 0100 1100 0010?

Reiwa 6th Year [1st Stage] First Semester Problem [No. 5]
Which of the following is the appropriate truth table for the logic circuit shown in the figure below?

Reiwa 6th Year [1st Stage] First Semester Problem [No. 6]
In the frequency shift modulation (FSK) shown in the figure below, when the pulse width T per transmission symbol of the digital signal is 2.5 [ms], which of the following is the appropriate value for the modulation speed B [baud]?

Reiwa 6th Year [1st Stage] First Semester Question [No. 7]
Which combination of words is appropriate to fill in (A) to (C) in the following description of amplitude modulation (AM)?
"In the frequency spectrum of amplitude modulation, [(A)] is the center, and [(B)] and [(C)] appear above and below it."
(A) Carrier frequency\n(B) Symmetric\n(C) Sideband
Reiwa 6th Year [1st Stage] First Semester Question [No. 8]
Which of the following descriptions regarding UHF band radio waves is incorrect?
Radio wave propagation is mainly due to surface waves and ionospheric reflection waves.
Reiwa 6th Year [1st Stage] First Semester Question [No. 9]
Which of the following is the appropriate name for the following description regarding audio data file formats?

"WAV is a file format that stores data sampled from raw sound, and is usually used uncompressed, resulting in large data sizes."
WAV
Reiwa 6th Year [1st Stage] First Semester Question [No. 10]
Which of the following descriptions regarding interpreters is correct?
An interpreter executes a source program by translating it into machine code line by line.
Reiwa 6th Year [1st Stage] First Semester Question [No. 11]
Which of the following descriptions regarding semiconductors is incorrect?
A p-type semiconductor has more free electrons than holes.
Reiwa 6th Year [1st Stage] First Semester Question [No. 12]
Which of the following descriptions regarding sequence control is incorrect?
The control variable and the target value are compared, and a correction operation is performed to make them match.
Reiwa 6th Year [1st Stage] First Semester Question [No. 13]
Which of the following descriptions regarding the types, structure, and characteristics of optical fibers is incorrect?
An optical fiber consists of a core with a low refractive index in the center and a cladding with a high refractive index surrounding it.
Reiwa 6th Year [1st Stage] First Semester Question [No. 14]
Which combination of words is appropriate to fill in (A) and (B) in the following description of Time Division Multiplexing (TDM)?
"Time Division Multiplexing is a multiplexing method that divides and allocates multiple digital signals to [(B)] in order to transmit them over [(A)] transmission paths."
(A) One (B) Time-based
Reiwa 6th Year [1st Stage] First Semester Question [No. 15]
Which of the following descriptions of UTP cables used in LANs is incorrect?
It is a cable with shielding applied to a twisted pair cable.
Reiwa 6th Year [1st Stage] First Semester Question [No. 16]
Which combination of words is appropriate to fill in (A) and (B) in the following description of Internet connectivity?

"FTTH is a communication method in which [(A)] is directly brought from the central office to the subscriber's building, and [(B)] is installed on the subscriber's side, and a router is generally connected to it, and then computers and communication equipment are connected."
(A) Optical fiber (B) ONU
Reiwa 6th year [1st stage] First semester Question [No. 17]
Which of the following is the appropriate name for the following description regarding spatial multiplexing used in LTE, a fourth-generation (4G) mobile phone system?
"It is a technology that uses multiple antennas on both the transmitting and receiving sides to perform multiplexed communication through multiple independent transmission paths."
MIMO
Reiwa 6th year [1st stage] First semester Question [No. 18]
Which of the following is the appropriate name for the following description regarding fading?

"This is fading that occurs when electromagnetic waves are reflected or penetrated by the ionosphere depending on the height and electron density of the ionosphere."
Jump Fading
Reiwa 6th Year [1st Stage] First Semester Question [No. 19]
Which combination of words is appropriate to fill in (A) and (B) in the following description regarding the gain of antennas used in wireless communication?
"The gain of an antenna is given by the ratio of the maximum radiated power of the antenna to the maximum radiated power of the reference antenna when the same input power is applied. The gain when the reference antenna is a [(A)] antenna that radiates radio waves equally in all directions is called the [(B)] gain."
(A) Isotropic (B) Absolute
Reiwa 6th Year [1st Stage] First Semester Question [No. 20]
Which of the following descriptions regarding DSRC (Narrow-Side Communication) used in ITS (Intelligent Transportation Systems) in Japan is incorrect?
It is used to provide traffic congestion information and travel time at Wi-Fi hotspots.
Reiwa 6th Year [1st Stage] First Semester Question [No. 21]
Which of the following descriptions regarding IP in TCP/IP is incorrect?
IP is a data link layer protocol in the OSI reference model.
Reiwa 6th Year [1st Stage] First Semester Question [No. 22]
Which of the following descriptions regarding a network device called a bridge is correct?
It is a device that connects multiple LANs and acts as a relay for the data link layer of the OSI reference model. It relays MAC frames, reads their MAC addresses, and performs relay forwarding or discarding processing.
Reiwa 6th Year [1st Stage] First Semester Question [No. 23]
Which of the following is the correct name for the following description regarding authentication technology?
"It is a technology that uses public-key cryptography to verify that the data of transmitted electronic information has not been tampered with and that it belongs to the person concerned."
Digital Signature
Reiwa 6th Year [1st Stage] First Semester Question [No. 24]
Which of the following descriptions regarding Class C, a method of representing IP addresses, is correct?
The first 3 bits of an IP address are "110". Reiwa 6th Year [1st Stage] First Semester Question [No. 25]
Which of the following is the correct name for the phenomenon that corresponds to the following description regarding computer virtual memory management?
"When the total memory capacity required for program processing is extremely large compared to the capacity of main memory, frequent swap-in/swap-out occurs, preventing the original processing from progressing."
Thrashing
Reiwa 6th Year [1st Stage] First Semester Question [No. 26]
Which of the following combinations of words is appropriate for (A) and (B) in the following description regarding USB?
"USB is a serial interface that connects a PC and peripheral devices, and can connect up to [(A)] peripheral devices, and the transfer speed of the USB 3.2 standard is a maximum of [(B)] Gbps."
(A) 127 (B) 20
Reiwa 6th Year [1st Stage] First Semester Question [No. 27]
Which of the following is NOT a type of semiconductor memory used for auxiliary storage in computers?

HDD
Reiwa 6th Year [1st Stage] First Semester Question [No. 28]
Which of the following is the appropriate name for the following description regarding information security?
"Obtaining security-related information from waste generated by companies."
Social Engineering
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