What is the forward beta of the BJT KN2222A?
And for what it's worth there are multiple \$\beta\$ factors to consider when designing BJT circuits:


\$\beta\$, \$\beta_{DC}\$, \$h_{FE}\$ - These refer to the BJT's DC forward current gain when the BJT is operating in forward-active mode (small signal amplification). Used when performing the DC design/analysis.
(n.b. The 'FE' refers to Forward current gain, common-Emitter configuration.)
(n.b. Parameters written with UPPERCASE subscripts typically refer to DC parameters.)
\$\beta_{ac}\$, \$h_{fe}\$ - These refer to the BJT's AC forward current gain when the BJT is operating in forward-active mode (small signal amplification). Used when performing the AC design/analysis. Typically, \$\beta_{ac}\ll\beta_{DC}\$.
(n.b. Parameters written with lowercase subscripts typically refer to AC parameters.)
\$\beta_{sat}\$ - Refers to the BJT's forward current gain when the BJT is operating in "hard" saturation mode (when the BJT is turned ON fully). Typical values are \$5 \le \beta_{sat} \le 30\$ with \$\beta_{sat}=I_{C(sat)}/I_{B(sat)}=10\$ being a fairly common value for low power and medium power transistors.
(n.b. Data sheets often use lowercase text for parenthetical text&mdash;e.g., \$I_{C(sat)}\$, \$V_{BE(sat)}\$, etc. This does not indicate or imply that these are AC parameters.)
(n.b. \$\beta_{sat}\$ is not an AC parameter because the transistor is not performing small-signal AC amplification when it is operating in saturation mode.)


And as a general rule do not use \$\beta\$, \$\beta_{DC}\$, \$h_{FE}\$ to perform saturation calculations. If you do, the BJT will likely operate in "soft" saturation&mdash;i.e., in the transition region between the BJT's forward-active mode and its "hard" saturation (fully ON) mode.