Answer:
(a) There is no high tech jobs available for the high-tech workers and hence they are unemployed. So, this is a type structural unemployment.
(b) A stay at home dad looking for a job for a Christmas holiday which indicates that it is a seasonal unemployment.
(c) A soldier is searching a job which shows that it is a frictional unemployment.
(d) There is a fall in the national income of a nation, this is due to the recession and because of recession, individuals loosing their jobs. Hence, reduction in the consumption level. Therefore, it is a type of cyclical unemployment.