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What does HOTP stand for in cybersecurity?
a. Host-based One-Time Password
b. HMAC-based One-Time Password
c. Hardware-Oriented TOTP Password
d. High-security OTP
Answer: b. HMAC-based One-Time Password1kosmos+1
What is the primary use of HOTP in security systems?
a. Encrypting files
b. User authentication
c. Network routing
d. Virus detection
Answer: b. User authenticationbajajfinserv+1
Which core cryptographic principle does HOTP use to generate passwords?
a. Simple encryption
b. Hash-based Message Authentication Code
c. Steganography
d. Digital watermarking
Answer: b. Hash-based Message Authentication Codekzero+1
What are the two main components required to create an HOTP password?
a. Password and username
b. Secret key and counter
c. Device ID and timestamp
d. IP address and PIN
Answer: b. Secret key and counterrublon+1
HOTP is an example of which type of password?
a. Static password
b. One-time password
c. Default administrator password
d. Universal PIN
Answer: b. One-time passwordsharetru+1
What triggers the generation of a new HOTP password?
a. Time interval
b. A specific event or action
c. File access
d. User logoff
Answer: b. A specific event or actionloginradius+2
Which of the following correctly describes the “counter” in HOTP?
a. Counts failed login attempts
b. Increments each time an OTP is generated
c. Records the number of users
d. Tracks session duration
Answer: b. Increments each time an OTP is generated1kosmos+1
How are HOTP passwords delivered to users?
a. Printed mail only
b. Over secure digital channels or hardware tokens
c. Unsecured emails only
d. Written on paper
Answer: b. Over secure digital channels or hardware tokenssailpoint+1
When is an HOTP password considered invalid?
a. After it is used
b. When the system reboots
c. After one minute
d. After an hour
Answer: a. After it is usedsupertokens+1
What format is the typical output of an HOTP algorithm for human use?
a. Long alphanumeric string
b. 6-8 digit numeric code
c. Graphical barcode
d. Encrypted text file
Answer: b. 6-8 digit numeric codekzero+1
In HOTP, if the client and server counters are out of sync, what should happen?
a. Authentication is always denied
b. Server may validate OTPs within a look-ahead window
c. System automatically resets
d. User must restart their device
Answer: b. Server may validate OTPs within a look-ahead window1kosmos+1
What happens to the counter on both client and server after a successful HOTP authentication?
a. It resets to zero
b. It remains the same
c. It increments by one
d. It decrements by one
Answer: c. It increments by oneloginradius+1
Which hash algorithm is most commonly associated with HOTP by default?
a. MD5
b. SHA-1
c. SHA-512
d. SHA-256
Answer: b. SHA-1wikipedia+1
What differentiates HOTP from TOTP?
a. HOTP uses time as a factor
b. HOTP is event/counter-based, not time-based
c. TOTP is not used in authentication
d. HOTP never uses a counter
Answer: b. HOTP is event/counter-based, not time-basedrublon+2
What is the role of the shared secret in HOTP?
a. Encrypts all network data
b. Ensures passwords are unique per user and session
c. Used in combination with the counter to generate OTPs
d. Stores user PINs
Answer: c. Used in combination with the counter to generate OTPssailpoint+1
Why is it called “one-time password” in HOTP?
a. It is used only by one user
b. It is valid for a single authentication session
c. It is reused multiple times
d. It remains valid until the device is turned off
Answer: b. It is valid for a single authentication sessionsupertokens+1
Which RFC standard defines the HOTP algorithm?
a. RFC 1321
b. RFC 4226
c. RFC 3447
d. RFC 7231
Answer: b. RFC 4226wikipedia+1
What is the result after truncation in HOTP?
a. 160 bit hash
b. 31 bit integer, usually displayed as a numeric code
c. 500 character code
d. Binary file
Answer: b. 31 bit integer, usually displayed as a numeric codemojoauth+1
Which scenario is best suited for HOTP rather than TOTP?
a. When time synchronization is difficult
b. When passwords must change every minute
c. For offline password storage only
d. For Wi-Fi encryption
Answer: a. When time synchronization is difficultbajajfinserv+1
What happens if an HOTP code is intercepted before use?
a. It can be reused multiple times
b. It remains valid until used but is valid only once
c. It grants admin rights
d. It never expires
Answer: b. It remains valid until used but is valid only oncemojoauth+1
If an HOTP token generates codes without usage, what happens to the client-server counters?
a. Counters can become unsynchronized
b. Counters automatically realign
c. Codes expire immediately
d. The system stops working
Answer: a. Counters can become unsynchronizedkzero+1
How does HOTP help prevent replay attacks?
a. By using static passwords
b. By using a new code for each authentication event
c. By encrypting each OTP
d. Through time limitations
Answer: b. By using a new code for each authentication eventsupertokens+1
Why is strong key management important in HOTP?
a. Keys are public
b. A compromised key allows code generation
c. It prevents server restarts
d. To store passwords
Answer: b. A compromised key allows code generationsailpoint+1
What protocol is usually used by HOTP for code exchange?
a. SMTP
b. No specific protocol, as codes can be input manually
c. FTP
d. HTTP only
Answer: b. No specific protocol, as codes can be input manuallyrublon+1
What does HMAC stand for?
a. Hash-based Message Authentication Code
b. Host Message Authentication Check
c. Hypertext Mail Authentication Component
d. High-security Message Access
Answer: a. Hash-based Message Authentication Codeokta+1
In HOTP, which party needs to know the secret key?
a. Only the server
b. Both the server and the client/token
c. Only the user
d. Only the bank
Answer: b. Both the server and the client/tokenkzero+1
What happens if the server’s counter is ahead of the client’s in HOTP?
a. Authentication always succeeds
b. Server may scan ahead by a window to resynchronize
c. Codes are always rejected
d. The client asks for a reset
Answer: b. Server may scan ahead by a window to resynchronize1kosmos+1
Which user action generates a new HOTP code in most physical tokens?
a. Clicking a button
b. Changing the password
c. Entering a PIN
d. Rebooting the device
Answer: a. Clicking a buttonmojoauth+1
What input values are combined in the HMAC function for HOTP?
a. Username and password
b. Counter and secret key
c. Time and user ID
d. Email and last login
Answer: b. Counter and secret keyrublon+1
Is an internet connection always required to use HOTP?
a. Yes, always
b. No, HOTP can be used offline
c. Sometimes
d. Only for the first setup
Answer: b. No, HOTP can be used offlineminiorange+1
Why do some applications prefer HOTP over TOTP?
a. Codes are valid longer and time sync is not needed
b. HOTP is always faster
c. TOTP is not secure
d. HOTP uses static passwords
Answer: a. Codes are valid longer and time sync is not neededbajajfinserv+1
Which attack is HOTP resistant to?
a. Brute force
b. Replay attack
c. Man-in-the-middle
d. SQL injection
Answer: b. Replay attacksupertokens+1
After initial setup, how do the client and server generate the same OTP?
a. Random generation
b. Both use shared secret and counter
c. Via email communication
d. Through a VPN
Answer: b. Both use shared secret and counterkzero+1
What could cause HOTP authentication to fail even if a correct code is entered?
a. Counter sync issue
b. Username case sensitivity
c. Incorrect password policy
d. Code too short
Answer: a. Counter sync issue1kosmos+1
HOTP codes are usually how many digits long?
a. 128
b. 3-4
c. 6-8
d. Unlimited
Answer: c. 6-81kosmos+1
Does HOTP require a synchronized clock between client and server?
a. Yes
b. No
c. Only during setup
d. Only in banking apps
Answer: b. Nosailpoint+1
What is the greatest risk if the HOTP secret key is exposed?
a. Service outage
b. Attacker can generate valid codes
c. Key cannot be reused
d. Server goes offline
Answer: b. Attacker can generate valid codesmojoauth+1
Why are HOTP values truncated from the full hash?
a. To save disk space
b. To produce human-readable codes
c. To improve hash strength
d. To send less data
Answer: b. To produce human-readable codesmojoauth+1
What is the purpose of the “look ahead window” in HOTP?
a. To allow codes for future logins
b. To enable counter synchronization between client and server
c. To prolong password expiration
d. To hide the hash function
Answer: b. To enable counter synchronization between client and serverkzero+1
Which application typically uses HOTP codes?
a. Music streaming
b. Two-factor authentication apps
c. Spreadsheet editing
d. Data backup
Answer: b. Two-factor authentication appspingidentity+1
What makes HOTP suitable for hardware tokens?
a. Its dependence on constant internet
b. It only works on Android
c. Event-based generation allows independence from time
d. Requires SMS for delivery
Answer: c. Event-based generation allows independence from timebajajfinserv+1
What security benefit does HOTP provide over static passwords?
a. Unlimited use
b. Usable across multiple users
c. Single-use prevents reuse and reduces risk
d. Never requires setup
Answer: c. Single-use prevents reuse and reduces risksharetru+1
In which way can HOTP codes be delivered other than via an authenticator app?
a. SMS
b. Spoken in a call
c. Both SMS and call
d. All of the above
Answer: d. All of the aboveminiorange+1
In HOTP, if a user requests multiple codes and doesn’t use them, what should the server do?
a. Reset the user
b. Allow a window of unused codes for synchronization
c. Reject all future logins
d. Ask for admin approval
Answer: b. Allow a window of unused codes for synchronization1kosmos+1
What kind of event typically increments the HOTP counter?
a. Hardware device reset
b. OTP generation or authentication event
c. Change of user’s email
d. Software update
Answer: b. OTP generation or authentication eventsupertokens+1
What is a human-readable OTP generated by HOTP commonly called?
a. API token
b. PIN
c. Passcode
d. Hash fragment
Answer: c. Passcodemojoauth+1
Why is HOTP considered “deterministic”?
a. It predicts future passwords
b. With same inputs, always produces the same OTP
c. It changes output each minute
d. It requires cloud access
Answer: b. With same inputs, always produces the same OTPrublon+1
If a 6-digit HOTP code is randomly guessed, what is the probability it’s correct?
a. 1 in 1000
b. 1 in 100
c. 1 in 1,000,000
d. 1 in 10,000,000
Answer: c. 1 in 1,000,000wikipedia+1
Why is HOTP still used if TOTP is available?
a. Not all systems support synchronized clocks
b. HOTP is less secure
c. HOTP is faster
d. TOTP is always free
Answer: a. Not all systems support synchronized clocksnordpass+1
Which statement about using HOTP in multifactor authentication is true?
a. It should always be the only factor
b. It can be used as a secondary factor to greatly improve account security
c. It is never recommended
d. It is used only for administrators
Answer: b. It can be used as a secondary factor to greatly improve account securitydzone+1

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